+- 6.5 Grendel Forum (https://65grendel.com)
+-- Forum: MARKSMANSHIP TRAINING FORUM (https://65grendel.com/forumdisplay.php?fid=6)
+--- Forum: Technical Knowledge (https://65grendel.com/forumdisplay.php?fid=28)
+--- Thread: Help - Figureing out ballastic issues (/showthread.php?tid=13765)
Pages:
1
2
Help - Figureing out ballastic issues - Sticks - 07-25-2017
I have a Kestrel w/applied ballistics, and was trying to verify data with JBM ballistics calculator, and neither one agrees with the same data input.
Not sure where I am screwing up. The differences are fairly large (.2+mil at 700y) and can be the difference between a hit and air ball at longer ranges on a 2 MOA target with my skillset.
If someone could run the following info on an app, not one of the two above, and post the range data every 50y so I can see if I can get two to agree.
6.5 Grendel
1:8 RH
Bore Height 2.82"
Zero at 100y
123 gr ELD
.506 G1 BC
1.248 bullet length
2515 fps @ 6" from muzzle
Altitude 4880
latitude 40.4*
Ammo 70*
Ambient temp at 80*
Baro (station pressure) 25.31 inHg
Humidity 45%
I know I need to do a grouping at 800 or so to do a calibration..and this is where my head starts to swim a little if the Kestrel will extrapolate based on changing conditions or not.
Help - Figureing out ballastic issues - Bigs28 - 07-25-2017
I think i entered in everything correctly
Distance, yards Bullet speed, f/s Vert. correction, MRAD Hor. correction, MRAD
100.0 2379.9 0.0 0.16
150.0 2314.0 0.2 0.25
200.0 2249.0 0.5 0.34
250.0 2185.4 0.8 0.43
300.0 2123.0 1.3 0.52
350.0 2061.7 1.7 0.61
400.0 2001.3 2.2 0.71
450.0 1942.3 2.7 0.81
500.0 1884.5 3.2 0.91
550.0 1827.4 3.8 1.02
600.0 1771.7 4.4 1.13
650.0 1716.9 5.0 1.24
700.0 1663.4 5.6 1.36
750.0 1610.9 6.3 1.47
800.0 1559.4 7.0 1.60
850.0 1508.9 7.8 1.72
900.0 1459.6 8.5 1.86
950.0 1411.1 9.4 1.99
1000.0 1363.8 10.2 2.13
Help - Figureing out ballastic issues - Sticks - 07-25-2017
Thank you Bigs28.
What app or program did you use?
Help - Figureing out ballastic issues - Bigs28 - 07-25-2017
Strelok
Help - Figureing out ballastic issues - NugginFutz - 07-25-2017
[TABLE="align: center"]
[TR]
[TD]Ballistic AE
Input Parameters
[TABLE="align: center"]
[TR]
[TD]BC[/TD]
[TD]Bullet
Weight[/TD]
[TD]Muzzle
Velocity[/TD]
[TD]Zero
Range [/TD]
[TD]Sight
Height[/TD]
[TD]LOS
Angle [/TD]
[/TR]
[TR]
[TD] 0.506 G1 [/TD]
[TD]123gr[/TD]
[TD]2515[/TD]
[TD]100[/TD]
[TD]2.8 in[/TD]
[TD]0°[/TD]
[/TR]
[TR]
[TD]Altitude[/TD]
[TD]Pressure[/TD]
[TD]Temp[/TD]
[TD]RH [/TD]
[TD]Wind
Velocity[/TD]
[TD]Wind
Angle [/TD]
[/TR]
[TR]
[TD]4880.0[/TD]
[TD] 25.31 Hg. [/TD]
[TD]80.0 °F[/TD]
[TD]45%[/TD]
[TD]10.0[/TD]
[TD]90[/TD]
[/TR]
[TR]
[TD]Zero
Altitude[/TD]
[TD]Zero
Pressure[/TD]
[TD]Zero
Temp[/TD]
[TD]Zero
RH [/TD]
[TD]Min.
PBR[/TD]
[TD]Max.
PBR[/TD]
[/TR]
[TR]
[TD]4880.0[/TD]
[TD] 25.31 Hg. [/TD]
[TD]80.0 °F[/TD]
[TD]45%[/TD]
[TD]0[/TD]
[TD]221[/TD]
[/TR]
[TR]
[TD="colspan: 3"]Miller Stability[/TD]
[TD="colspan: 3"]2.35[/TD]
[/TR]
[/TABLE]
Bullet Trajectory
[TABLE="align: center"]
[TR]
[TD="colspan: 2"] Range
(yards)[/TD]
[TD]Drop
(in)[/TD]
[TD]Drop
(mrad)[/TD]
[TD]Wind.
(in)[/TD]
[TD]Wind.
(mrad)[/TD]
[TD] Veloc.
(fps)[/TD]
[TD]Energy
(ft-lbs)[/TD]
[TD]Time
(sec)[/TD]
[/TR]
[TR]
[TD] 0[/TD]
[TD]↓[/TD]
[TD]-2.84 [/TD]
[TD]0.00 [/TD]
[TD]0.00 [/TD]
[TD]0.00 [/TD]
[TD]2515 [/TD]
[TD]1728 [/TD]
[TD]0.00 [/TD]
[/TR]
[TR]
[TD] 50[/TD]
[TD][/TD]
[TD]-0.69 [/TD]
[TD]-0.38 [/TD]
[TD]-0.04 [/TD]
[TD]-0.02 [/TD]
[TD]2445 [/TD]
[TD]1632 [/TD]
[TD]0.06 [/TD]
[/TR]
[TR]
[TD] 100[/TD]
[TD]⊕[/TD]
[TD]-0.00 [/TD]
[TD]-0.00 [/TD]
[TD]0.02 [/TD]
[TD]0.01 [/TD]
[TD]2375 [/TD]
[TD]1540 [/TD]
[TD]0.12 [/TD]
[/TR]
[TR]
[TD] 150[/TD]
[TD][/TD]
[TD]-0.86 [/TD]
[TD]-0.16 [/TD]
[TD]0.22 [/TD]
[TD]0.04 [/TD]
[TD]2307 [/TD]
[TD]1453 [/TD]
[TD]0.19 [/TD]
[/TR]
[TR]
[TD] 200[/TD]
[TD][/TD]
[TD]-3.37 [/TD]
[TD]-0.47 [/TD]
[TD]0.61 [/TD]
[TD]0.08 [/TD]
[TD]2239 [/TD]
[TD]1369 [/TD]
[TD]0.25 [/TD]
[/TR]
[TR]
[TD] 221[/TD]
[TD]↑[/TD]
[TD]-5.02 [/TD]
[TD]-0.63 [/TD]
[TD]0.85 [/TD]
[TD]0.11 [/TD]
[TD]2211 [/TD]
[TD]1333 [/TD]
[TD]0.28 [/TD]
[/TR]
[TR]
[TD] 250[/TD]
[TD][/TD]
[TD]-7.62 [/TD]
[TD]-0.85 [/TD]
[TD]1.24 [/TD]
[TD]0.14 [/TD]
[TD]2173 [/TD]
[TD]1289 [/TD]
[TD]0.32 [/TD]
[/TR]
[TR]
[TD] 300[/TD]
[TD][/TD]
[TD]-13.73 [/TD]
[TD]-1.27 [/TD]
[TD]2.18 [/TD]
[TD]0.20 [/TD]
[TD]2108 [/TD]
[TD]1213 [/TD]
[TD]0.39 [/TD]
[/TR]
[TR]
[TD] 350[/TD]
[TD][/TD]
[TD]-21.80 [/TD]
[TD]-1.73 [/TD]
[TD]3.48 [/TD]
[TD]0.28 [/TD]
[TD]2044 [/TD]
[TD]1141 [/TD]
[TD]0.46 [/TD]
[/TR]
[TR]
[TD] 400[/TD]
[TD][/TD]
[TD]-31.96 [/TD]
[TD]-2.22 [/TD]
[TD]5.23 [/TD]
[TD]0.36 [/TD]
[TD]1981 [/TD]
[TD]1071 [/TD]
[TD]0.54 [/TD]
[/TR]
[TR]
[TD] 450[/TD]
[TD][/TD]
[TD]-44.36 [/TD]
[TD]-2.74 [/TD]
[TD]7.45 [/TD]
[TD]0.46 [/TD]
[TD]1919 [/TD]
[TD]1006 [/TD]
[TD]0.61 [/TD]
[/TR]
[TR]
[TD] 500[/TD]
[TD][/TD]
[TD]-59.13 [/TD]
[TD]-3.28 [/TD]
[TD]10.13 [/TD]
[TD]0.56 [/TD]
[TD]1859 [/TD]
[TD]944 [/TD]
[TD]0.69 [/TD]
[/TR]
[TR]
[TD] 550[/TD]
[TD][/TD]
[TD]-76.43 [/TD]
[TD]-3.86 [/TD]
[TD]13.29 [/TD]
[TD]0.67 [/TD]
[TD]1800 [/TD]
[TD]885 [/TD]
[TD]0.78 [/TD]
[/TR]
[TR]
[TD] 600[/TD]
[TD][/TD]
[TD]-96.43 [/TD]
[TD]-4.46 [/TD]
[TD]16.90 [/TD]
[TD]0.78 [/TD]
[TD]1742 [/TD]
[TD]829 [/TD]
[TD]0.86 [/TD]
[/TR]
[TR]
[TD] 650[/TD]
[TD][/TD]
[TD]-119.31 [/TD]
[TD]-5.10 [/TD]
[TD]20.96 [/TD]
[TD]0.90 [/TD]
[TD]1686 [/TD]
[TD]776 [/TD]
[TD]0.95 [/TD]
[/TR]
[TR]
[TD] 700[/TD]
[TD][/TD]
[TD]-145.27 [/TD]
[TD]-5.76 [/TD]
[TD]25.46 [/TD]
[TD]1.01 [/TD]
[TD]1632 [/TD]
[TD]727 [/TD]
[TD]1.04 [/TD]
[/TR]
[TR]
[TD] 750[/TD]
[TD][/TD]
[TD]-174.51 [/TD]
[TD]-6.46 [/TD]
[TD]30.38 [/TD]
[TD]1.12 [/TD]
[TD]1579 [/TD]
[TD]680 [/TD]
[TD]1.13 [/TD]
[/TR]
[TR]
[TD] 800[/TD]
[TD][/TD]
[TD]-207.27 [/TD]
[TD]-7.20 [/TD]
[TD]35.71 [/TD]
[TD]1.24 [/TD]
[TD]1527 [/TD]
[TD]637 [/TD]
[TD]1.23 [/TD]
[/TR]
[TR]
[TD] 850[/TD]
[TD][/TD]
[TD]-243.77 [/TD]
[TD]-7.97 [/TD]
[TD]41.43 [/TD]
[TD]1.35 [/TD]
[TD]1478 [/TD]
[TD]596 [/TD]
[TD]1.33 [/TD]
[/TR]
[TR]
[TD] 900[/TD]
[TD][/TD]
[TD]-284.28 [/TD]
[TD]-8.77 [/TD]
[TD]47.53 [/TD]
[TD]1.47 [/TD]
[TD]1430 [/TD]
[TD]559 [/TD]
[TD]1.43 [/TD]
[/TR]
[TR]
[TD] 950[/TD]
[TD][/TD]
[TD]-329.07 [/TD]
[TD]-9.62 [/TD]
[TD]53.97 [/TD]
[TD]1.58 [/TD]
[TD]1385 [/TD]
[TD]524 [/TD]
[TD]1.54 [/TD]
[/TR]
[TR]
[TD] 1000[/TD]
[TD][/TD]
[TD]-378.42 [/TD]
[TD]-10.51 [/TD]
[TD]60.74 [/TD]
[TD]1.69 [/TD]
[TD]1342 [/TD]
[TD]491 [/TD]
[TD]1.65 [/TD]
[/TR]
[TR]
[TD] 1050[/TD]
[TD][/TD]
[TD]-432.64 [/TD]
[TD]-11.44 [/TD]
[TD]67.80 [/TD]
[TD]1.79 [/TD]
[TD]1301 [/TD]
[TD]462 [/TD]
[TD]1.76 [/TD]
[/TR]
[TR]
[TD] 1100[/TD]
[TD][/TD]
[TD]-492.02 [/TD]
[TD]-12.42 [/TD]
[TD]75.13 [/TD]
[TD]1.90 [/TD]
[TD]1262 [/TD]
[TD]435 [/TD]
[TD]1.88 [/TD]
[/TR]
[TR]
[TD] 1150[/TD]
[TD][/TD]
[TD]-556.91 [/TD]
[TD]-13.45 [/TD]
[TD]82.70 [/TD]
[TD]2.00 [/TD]
[TD]1226 [/TD]
[TD]410 [/TD]
[TD]2.00 [/TD]
[/TR]
[TR]
[TD] 1200[/TD]
[TD][/TD]
[TD]-627.62 [/TD]
[TD]-14.53 [/TD]
[TD]90.47 [/TD]
[TD]2.09 [/TD]
[TD]1193 [/TD]
[TD]388 [/TD]
[TD]2.12 [/TD]
[/TR]
[TR]
[TD="colspan: 2"] Range [/TD]
[TD]Drop[/TD]
[TD]Drop[/TD]
[TD]Wind.[/TD]
[TD]Wind.[/TD]
[TD] Veloc. [/TD]
[TD]Energy [/TD]
[TD]Time[/TD]
[/TR]
[/TABLE]
[/TD]
[/TR]
[/TABLE]
Help - Figureing out ballastic issues - StoneHendge - 07-25-2017
Don't know if you or anyone else did it or if you programs do it automatically, but if your using station pressure, you need to zero the altitude. You should also really use a G7 model to go out to 700/800 yards and beyond. Maybe one (both?) program are making adjustments? G1 declines with velocity.
I used a G7 of .255 for ELD I pulled off the World Wide Web somewhere when I was breaking in my barrel and it seemed close enough
Help - Figureing out ballastic issues - NugginFutz - 07-25-2017
StoneHendge Wrote:Don't know if you or anyone else did it or if you programs do it automatically, but if your using station pressure, you need to zero the altitude. You should also really use a G7 model to go out to 700/800 yards and beyond. Maybe one (both?) program are making adjustments? G1 declines with velocity.
I used a G7 of .255 for ELD I pulled off the World Wide Web somewhere when I was breaking in my barrel and it seemed close enough
In the case of BAE, station pressure overrides ASL. I only plugged in G1 for the sake of consistency with the OP's data. By all means, use a G7 model when appropriate (most modern boat tail projectiles). G1 is still quite adequate for most flat based bullets.
Help - Figureing out ballastic issues - bj139 - 07-25-2017
I thought it would be about 10 MRAD at 1000 yds.
Help - Figureing out ballastic issues - Sticks - 07-25-2017
Now I have 4 drop charts that don't agree. All within .36...seems like a lot.
700 yards drop in mil
Applied Ballistics -5.58 (did not change with the BC changed to a G7 BC of .255)
JBM -5.4 (changes to 5.7 if I zero the altitude with station pressure)
Strelok -5.6
Ballistic AE -5.76
Ultimately I need to shoot at that range, or something close to and get dialed in and tweak numbers until they match POI.
Just kind of stunned that there is that much variance between 4 flavors.
Does one throw out the high and low? Puts Applied Ballistics and Strelok side by side at 700, more variation at 1k (Strelok 10.2 / AB 10.29)
Help - Figureing out ballastic issues - StoneHendge - 07-25-2017
NugginFutz Wrote:In the case of BAE, station pressure overrides ASL. I only plugged in G1 for the sake of consistency with the OP's data. By all means, use a G7 model when appropriate (most modern boat tail projectiles). G1 is still quite adequate for most flat based bullets.
Yeah - every program is different. I use Shooter and you need to make the pressure absolute. Otherwise my 123 gr Scenar wouldn't be going subsonic until 1700 yards at a station pressure of 23.9 adjusted for an altitude of 6600ft. Which would rock! Makes me want to put a target on top of a 14er and climb the next one over.....
Help - Figureing out ballastic issues - NugginFutz - 07-25-2017
Sticks Wrote:...
Applied Ballistics -5.58 (did not change with the BC changed to a G7 BC of .255)
...
Ultimately I need to shoot at that range, or something close to and get dialed in and tweak numbers until they match POI.
Just kind of stunned that there is that much variance between 4 flavors.
Does one throw out the high and low? Puts Applied Ballistics and Strelok side by side at 700, more variation at 1k (Strelok 10.2 / AB 10.29)
If your numbers didn't change with the .255 G7 BC, you've gone wrong somewhere.
Here's BAE with a .255 G7.
[TABLE="align: center"]
[TR]
[TD]Bullet Trajectory
[TABLE="align: center"]
[TR]
[TD="colspan: 2"] Range
(yards)[/TD]
[TD]Drop
(in)[/TD]
[TD]Drop
(mrad)[/TD]
[TD]Wind.
(in)[/TD]
[TD]Wind.
(mrad)[/TD]
[TD] Veloc.
(fps)[/TD]
[TD]Energy
(ft-lbs)[/TD]
[TD]Time
(sec)[/TD]
[/TR]
[TR]
[TD] 0[/TD]
[TD]↓[/TD]
[TD]-2.84[/TD]
[TD]0.00[/TD]
[TD]0.00[/TD]
[TD]0.00[/TD]
[TD]2515[/TD]
[TD]1728[/TD]
[TD]0.00[/TD]
[/TR]
[TR]
[TD] 50[/TD]
[TD][/TD]
[TD]-0.69[/TD]
[TD]-0.38[/TD]
[TD]-0.04[/TD]
[TD]-0.02[/TD]
[TD]2445[/TD]
[TD]1632[/TD]
[TD]0.06[/TD]
[/TR]
[TR]
[TD] 100[/TD]
[TD]⊕[/TD]
[TD]-0.00[/TD]
[TD]-0.00[/TD]
[TD]0.02[/TD]
[TD]0.01[/TD]
[TD]2375[/TD]
[TD]1540[/TD]
[TD]0.12[/TD]
[/TR]
[TR]
[TD] 150[/TD]
[TD][/TD]
[TD]-0.86[/TD]
[TD]-0.16[/TD]
[TD]0.22[/TD]
[TD]0.04[/TD]
[TD]2307[/TD]
[TD]1453[/TD]
[TD]0.19[/TD]
[/TR]
[TR]
[TD] 200[/TD]
[TD][/TD]
[TD]-3.37[/TD]
[TD]-0.47[/TD]
[TD]0.61[/TD]
[TD]0.08[/TD]
[TD]2240[/TD]
[TD]1370[/TD]
[TD]0.25[/TD]
[/TR]
[TR]
[TD] 221[/TD]
[TD]↑[/TD]
[TD]-5.02[/TD]
[TD]-0.63[/TD]
[TD]0.85[/TD]
[TD]0.11[/TD]
[TD]2212[/TD]
[TD]1334[/TD]
[TD]0.28[/TD]
[/TR]
[TR]
[TD] 250[/TD]
[TD][/TD]
[TD]-7.62[/TD]
[TD]-0.85[/TD]
[TD]1.24[/TD]
[TD]0.14[/TD]
[TD]2174[/TD]
[TD]1290[/TD]
[TD]0.32[/TD]
[/TR]
[TR]
[TD] 300[/TD]
[TD][/TD]
[TD]-13.72[/TD]
[TD]-1.27[/TD]
[TD]2.17[/TD]
[TD]0.20[/TD]
[TD]2109[/TD]
[TD]1214[/TD]
[TD]0.39[/TD]
[/TR]
[TR]
[TD] 350[/TD]
[TD][/TD]
[TD]-21.79[/TD]
[TD]-1.73[/TD]
[TD]3.47[/TD]
[TD]0.28[/TD]
[TD]2045[/TD]
[TD]1142[/TD]
[TD]0.46[/TD]
[/TR]
[TR]
[TD] 400[/TD]
[TD][/TD]
[TD]-31.95[/TD]
[TD]-2.22[/TD]
[TD]5.21[/TD]
[TD]0.36[/TD]
[TD]1982[/TD]
[TD]1073[/TD]
[TD]0.54[/TD]
[/TR]
[TR]
[TD] 450[/TD]
[TD][/TD]
[TD]-44.33[/TD]
[TD]-2.74[/TD]
[TD]7.42[/TD]
[TD]0.46[/TD]
[TD]1921[/TD]
[TD]1007[/TD]
[TD]0.61[/TD]
[/TR]
[TR]
[TD] 500[/TD]
[TD][/TD]
[TD]-59.09[/TD]
[TD]-3.28[/TD]
[TD]10.10[/TD]
[TD]0.56[/TD]
[TD]1860[/TD]
[TD]945[/TD]
[TD]0.69[/TD]
[/TR]
[TR]
[TD] 550[/TD]
[TD][/TD]
[TD]-76.37[/TD]
[TD]-3.86[/TD]
[TD]13.25[/TD]
[TD]0.67[/TD]
[TD]1800[/TD]
[TD]885[/TD]
[TD]0.78[/TD]
[/TR]
[TR]
[TD] 600[/TD]
[TD][/TD]
[TD]-96.35[/TD]
[TD]-4.46[/TD]
[TD]16.87[/TD]
[TD]0.78[/TD]
[TD]1741[/TD]
[TD]828[/TD]
[TD]0.86[/TD]
[/TR]
[TR]
[TD] 650[/TD]
[TD][/TD]
[TD]-119.22[/TD]
[TD]-5.09[/TD]
[TD]20.95[/TD]
[TD]0.90[/TD]
[TD]1683[/TD]
[TD]773[/TD]
[TD]0.95[/TD]
[/TR]
[TR]
[TD] 700[/TD]
[TD][/TD]
[TD]-145.18[/TD]
[TD]-5.76[/TD]
[TD]25.48[/TD]
[TD]1.01[/TD]
[TD]1625[/TD]
[TD]721[/TD]
[TD]1.04[/TD]
[/TR]
[TR]
[TD] 750[/TD]
[TD][/TD]
[TD]-174.45[/TD]
[TD]-6.46[/TD]
[TD]30.47[/TD]
[TD]1.13[/TD]
[TD]1569[/TD]
[TD]672[/TD]
[TD]1.13[/TD]
[/TR]
[TR]
[TD] 800[/TD]
[TD][/TD]
[TD]-207.28[/TD]
[TD]-7.20[/TD]
[TD]35.89[/TD]
[TD]1.25[/TD]
[TD]1513[/TD]
[TD]625[/TD]
[TD]1.23[/TD]
[/TR]
[TR]
[TD] 850[/TD]
[TD][/TD]
[TD]-243.93[/TD]
[TD]-7.97[/TD]
[TD]41.74[/TD]
[TD]1.36[/TD]
[TD]1458[/TD]
[TD]581[/TD]
[TD]1.33[/TD]
[/TR]
[TR]
[TD] 900[/TD]
[TD][/TD]
[TD]-284.70[/TD]
[TD]-8.79[/TD]
[TD]48.01[/TD]
[TD]1.48[/TD]
[TD]1404[/TD]
[TD]539[/TD]
[TD]1.44[/TD]
[/TR]
[TR]
[TD] 950[/TD]
[TD][/TD]
[TD]-329.90[/TD]
[TD]-9.65[/TD]
[TD]54.68[/TD]
[TD]1.60[/TD]
[TD]1352[/TD]
[TD]499[/TD]
[TD]1.55[/TD]
[/TR]
[TR]
[TD] 1000[/TD]
[TD][/TD]
[TD]-379.89[/TD]
[TD]-10.55[/TD]
[TD]61.73[/TD]
[TD]1.71[/TD]
[TD]1300[/TD]
[TD]462[/TD]
[TD]1.66[/TD]
[/TR]
[TR]
[TD] 1050[/TD]
[TD][/TD]
[TD]-435.07[/TD]
[TD]-11.51[/TD]
[TD]69.15[/TD]
[TD]1.83[/TD]
[TD]1250[/TD]
[TD]427[/TD]
[TD]1.78[/TD]
[/TR]
[TR]
[TD] 1100[/TD]
[TD][/TD]
[TD]-495.85[/TD]
[TD]-12.52[/TD]
[TD]76.89[/TD]
[TD]1.94[/TD]
[TD]1201[/TD]
[TD]394[/TD]
[TD]1.90[/TD]
[/TR]
[TR]
[TD] 1150[/TD]
[TD][/TD]
[TD]-562.69[/TD]
[TD]-13.59[/TD]
[TD]84.94[/TD]
[TD]2.05[/TD]
[TD]1154[/TD]
[TD]364[/TD]
[TD]2.03[/TD]
[/TR]
[TR]
[TD="colspan: 11"][/TD]
[/TR]
[TR]
[TD]1168[/TD]
[TD][/TD]
[TD]-589.79[/TD]
[TD]-14.01[/TD]
[TD]88.06[/TD]
[TD]2.09[/TD]
[TD]1139[/TD]
[TD]353[/TD]
[TD]2.08[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD] 1200[/TD]
[TD][/TD]
[TD]-636.11[/TD]
[TD]-14.72[/TD]
[TD]93.24[/TD]
[TD]2.16[/TD]
[TD]1114[/TD]
[TD]339[/TD]
[TD]2.16[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="colspan: 2"] Range [/TD]
[TD]Drop[/TD]
[TD]Drop[/TD]
[TD]Wind.[/TD]
[TD]Wind.[/TD]
[TD] Veloc. [/TD]
[TD]Energy [/TD]
[TD]Time[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[/TABLE]
[/TD]
[/TR]
[/TABLE]
My experiences with BAE have all been positive. It has always been quite close when my data is good. Just be certain your MV is corrected for being measured 6" (inches) from the muzzle. I question this only because that is either too close for an optical Chronograph or seems a bit far for a magnetospeed.
Help - Figureing out ballastic issues - Sticks - 07-25-2017
StoneHendge Wrote:Yeah - every program is different. I use Shooter and you need to make the pressure absolute. Otherwise my 123 gr Scenar wouldn't be going subsonic until 1700 yards at a station pressure of 23.9 adjusted for an altitude of 6600ft. Which would rock! Makes me want to put a target on top of a 14er and climb the next one over.....
ShootersCalculator (I am guessing the same one) spit out a number closer to JBM of 5.37.
NugginFutz Wrote:If your numbers didn't change with the .255 G7 BC, you've gone wrong somewhere.
Here's BAE with a .255 G7.
[TABLE="align: center"]
[TR]
[TD]Bullet Trajectory
[TABLE="align: center"]
[TR]
[TD="colspan: 2"] Range
(yards)[/TD]
[TD]Drop
(in)[/TD]
[TD]Drop
(mrad)[/TD]
[TD]Wind.
(in)[/TD]
[TD]Wind.
(mrad)[/TD]
[TD] Veloc.
(fps)[/TD]
[TD]Energy
(ft-lbs)[/TD]
[TD]Time
(sec)[/TD]
[/TR]
[TR]
[TD] 0[/TD]
[TD]↓[/TD]
[TD]-2.84[/TD]
[TD]0.00[/TD]
[TD]0.00[/TD]
[TD]0.00[/TD]
[TD]2515[/TD]
[TD]1728[/TD]
[TD]0.00[/TD]
[/TR]
[TR]
[TD] 50[/TD]
[TD][/TD]
[TD]-0.69[/TD]
[TD]-0.38[/TD]
[TD]-0.04[/TD]
[TD]-0.02[/TD]
[TD]2445[/TD]
[TD]1632[/TD]
[TD]0.06[/TD]
[/TR]
[TR]
[TD] 100[/TD]
[TD]⊕[/TD]
[TD]-0.00[/TD]
[TD]-0.00[/TD]
[TD]0.02[/TD]
[TD]0.01[/TD]
[TD]2375[/TD]
[TD]1540[/TD]
[TD]0.12[/TD]
[/TR]
[TR]
[TD] 150[/TD]
[TD][/TD]
[TD]-0.86[/TD]
[TD]-0.16[/TD]
[TD]0.22[/TD]
[TD]0.04[/TD]
[TD]2307[/TD]
[TD]1453[/TD]
[TD]0.19[/TD]
[/TR]
[TR]
[TD] 200[/TD]
[TD][/TD]
[TD]-3.37[/TD]
[TD]-0.47[/TD]
[TD]0.61[/TD]
[TD]0.08[/TD]
[TD]2240[/TD]
[TD]1370[/TD]
[TD]0.25[/TD]
[/TR]
[TR]
[TD] 221[/TD]
[TD]↑[/TD]
[TD]-5.02[/TD]
[TD]-0.63[/TD]
[TD]0.85[/TD]
[TD]0.11[/TD]
[TD]2212[/TD]
[TD]1334[/TD]
[TD]0.28[/TD]
[/TR]
[TR]
[TD] 250[/TD]
[TD][/TD]
[TD]-7.62[/TD]
[TD]-0.85[/TD]
[TD]1.24[/TD]
[TD]0.14[/TD]
[TD]2174[/TD]
[TD]1290[/TD]
[TD]0.32[/TD]
[/TR]
[TR]
[TD] 300[/TD]
[TD][/TD]
[TD]-13.72[/TD]
[TD]-1.27[/TD]
[TD]2.17[/TD]
[TD]0.20[/TD]
[TD]2109[/TD]
[TD]1214[/TD]
[TD]0.39[/TD]
[/TR]
[TR]
[TD] 350[/TD]
[TD][/TD]
[TD]-21.79[/TD]
[TD]-1.73[/TD]
[TD]3.47[/TD]
[TD]0.28[/TD]
[TD]2045[/TD]
[TD]1142[/TD]
[TD]0.46[/TD]
[/TR]
[TR]
[TD] 400[/TD]
[TD][/TD]
[TD]-31.95[/TD]
[TD]-2.22[/TD]
[TD]5.21[/TD]
[TD]0.36[/TD]
[TD]1982[/TD]
[TD]1073[/TD]
[TD]0.54[/TD]
[/TR]
[TR]
[TD] 450[/TD]
[TD][/TD]
[TD]-44.33[/TD]
[TD]-2.74[/TD]
[TD]7.42[/TD]
[TD]0.46[/TD]
[TD]1921[/TD]
[TD]1007[/TD]
[TD]0.61[/TD]
[/TR]
[TR]
[TD] 500[/TD]
[TD][/TD]
[TD]-59.09[/TD]
[TD]-3.28[/TD]
[TD]10.10[/TD]
[TD]0.56[/TD]
[TD]1860[/TD]
[TD]945[/TD]
[TD]0.69[/TD]
[/TR]
[TR]
[TD] 550[/TD]
[TD][/TD]
[TD]-76.37[/TD]
[TD]-3.86[/TD]
[TD]13.25[/TD]
[TD]0.67[/TD]
[TD]1800[/TD]
[TD]885[/TD]
[TD]0.78[/TD]
[/TR]
[TR]
[TD] 600[/TD]
[TD][/TD]
[TD]-96.35[/TD]
[TD]-4.46[/TD]
[TD]16.87[/TD]
[TD]0.78[/TD]
[TD]1741[/TD]
[TD]828[/TD]
[TD]0.86[/TD]
[/TR]
[TR]
[TD] 650[/TD]
[TD][/TD]
[TD]-119.22[/TD]
[TD]-5.09[/TD]
[TD]20.95[/TD]
[TD]0.90[/TD]
[TD]1683[/TD]
[TD]773[/TD]
[TD]0.95[/TD]
[/TR]
[TR]
[TD] 700[/TD]
[TD][/TD]
[TD]-145.18[/TD]
[TD]-5.76[/TD]
[TD]25.48[/TD]
[TD]1.01[/TD]
[TD]1625[/TD]
[TD]721[/TD]
[TD]1.04[/TD]
[/TR]
[TR]
[TD] 750[/TD]
[TD][/TD]
[TD]-174.45[/TD]
[TD]-6.46[/TD]
[TD]30.47[/TD]
[TD]1.13[/TD]
[TD]1569[/TD]
[TD]672[/TD]
[TD]1.13[/TD]
[/TR]
[TR]
[TD] 800[/TD]
[TD][/TD]
[TD]-207.28[/TD]
[TD]-7.20
[/TD]
[TD]35.89[/TD]
[TD]1.25[/TD]
[TD]1513[/TD]
[TD]625[/TD]
[TD]1.23[/TD]
[/TR]
[TR]
[TD] 850[/TD]
[TD][/TD]
[TD]-243.93[/TD]
[TD]-7.97[/TD]
[TD]41.74[/TD]
[TD]1.36[/TD]
[TD]1458[/TD]
[TD]581[/TD]
[TD]1.33[/TD]
[/TR]
[TR]
[TD] 900[/TD]
[TD][/TD]
[TD]-284.70[/TD]
[TD]-8.79
[/TD]
[TD]48.01[/TD]
[TD]1.48[/TD]
[TD]1404[/TD]
[TD]539[/TD]
[TD]1.44[/TD]
[/TR]
[TR]
[TD] 950[/TD]
[TD][/TD]
[TD]-329.90[/TD]
[TD]-9.65[/TD]
[TD]54.68[/TD]
[TD]1.60[/TD]
[TD]1352[/TD]
[TD]499[/TD]
[TD]1.55[/TD]
[/TR]
[TR]
[TD] 1000[/TD]
[TD][/TD]
[TD]-379.89[/TD]
[TD]-10.55[/TD]
[TD]61.73[/TD]
[TD]1.71[/TD]
[TD]1300[/TD]
[TD]462[/TD]
[TD]1.66[/TD]
[/TR]
[TR]
[TD] 1050[/TD]
[TD][/TD]
[TD]-435.07[/TD]
[TD]-11.51[/TD]
[TD]69.15[/TD]
[TD]1.83[/TD]
[TD]1250[/TD]
[TD]427[/TD]
[TD]1.78[/TD]
[/TR]
[TR]
[TD] 1100[/TD]
[TD][/TD]
[TD]-495.85[/TD]
[TD]-12.52[/TD]
[TD]76.89[/TD]
[TD]1.94[/TD]
[TD]1201[/TD]
[TD]394[/TD]
[TD]1.90[/TD]
[/TR]
[TR]
[TD] 1150[/TD]
[TD][/TD]
[TD]-562.69[/TD]
[TD]-13.59[/TD]
[TD]84.94
[/TD]
[TD]2.05[/TD]
[TD]1154[/TD]
[TD]364[/TD]
[TD]2.03[/TD]
[/TR]
[TR]
[TD="colspan: 11"][/TD]
[/TR]
[TR]
[TD]1168[/TD]
[TD][/TD]
[TD]-589.79[/TD]
[TD]-14.01[/TD]
[TD]88.06[/TD]
[TD]2.09[/TD]
[TD]1139[/TD]
[TD]353[/TD]
[TD]2.08[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD] 1200[/TD]
[TD][/TD]
[TD]-636.11[/TD]
[TD]-14.72[/TD]
[TD]93.24[/TD]
[TD]2.16[/TD]
[TD]1114[/TD]
[TD]339[/TD]
[TD]2.16[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="colspan: 2"] Range [/TD]
[TD]Drop[/TD]
[TD]Drop[/TD]
[TD]Wind.[/TD]
[TD]Wind.[/TD]
[TD] Veloc. [/TD]
[TD]Energy [/TD]
[TD]Time[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[/TABLE]
[/TD]
[/TR]
[/TABLE]
My experiences with BAE have all been positive. It has always been quite close when my data is good. Just be certain your MV is corrected for being measured 6" (inches) from the muzzle. I question this only because that is either too close for an optical Chronograph or seems a bit far for a magnetospeed.
Yours is still showing 5.76 for 700y
Magneto speed was the Chrono, I split the difference between the two sensors (Front and Rear)
Help - Figureing out ballastic issues - NugginFutz - 07-25-2017
StoneHendge Wrote:Yeah - every program is different. I use Shooter and you need to make the pressure absolute. Otherwise my 123 gr Scenar wouldn't be going subsonic until 1700 yards at a station pressure of 23.9 adjusted for an altitude of 6600ft. Which would rock! Makes me want to put a target on top of a 14er and climb the next one over.....
Yeah, but how do you breathe? I've been up a few, including Pike's Peak. Just driving made me light headed.:eek:
Help - Figureing out ballastic issues - LR1955 - 07-25-2017
Sticks Wrote:Now I have 4 drop charts that don't agree. All within .36...seems like a lot.
700 yards drop in mil
Applied Ballistics -5.58 (did not change with the BC changed to a G7 BC of .255)
JBM -5.4 (changes to 5.7 if I zero the altitude with station pressure)
Strelok -5.6
Ballistic AE -5.76
Ultimately I need to shoot at that range, or something close to and get dialed in and tweak numbers until they match POI.
Just kind of stunned that there is that much variance between 4 flavors.
Does one throw out the high and low? Puts Applied Ballistics and Strelok side by side at 700, more variation at 1k (Strelok 10.2 / AB 10.29)
Sticks:
If all are within .36 m, they are within about around a minute of each other. Find what their average is and use what ever program is closest to that average.
LR55
Help - Figureing out ballastic issues - Sticks - 07-25-2017
Quick look at the numbers shows a 15" variance at 700y between the high and low.
I need to do some more reading, and shooting. This match that I am shooting next weekend is looking sketchy for those targets past 500 unless I get this data and math solved on my end.
Help - Figureing out ballastic issues - StoneHendge - 07-26-2017
Corrected:
Shooter puts 700 yds at -5.7 using the G7 .255
The -5.4 from JBM is meaningless. All you care about is the actual air pressure - i.e. Station pressure. Barometric pressure readings can be adjusted to what they would be at sea level. In those instances, altitude adjusts them back to absolute pressure. My guess is that with the 5.4, the program is adjusting a 25.3 sea level pressure to what it would be at your altitude...
Throwing that out, No output is really more than 0.1 mils off the mean. That's about 1/3 MOA on a 2 MOA target.....
Help - Figureing out ballastic issues - LRRPF52 - 07-26-2017
Hornady has doppler radar data for that bullet in their program.
Not sure how accurate it will be, but I would try that too.
Help - Figureing out ballastic issues - Klem - 07-26-2017
They are all slightly different and are theoretical simulations anyway. None are likely to match exactly your gun in whatever conditions on the day. In your shoes I would shoot the 800yds (and at as many other ranges as I could) to get a feel for your ballistic curve. Then see which calculator is the closest match. Any of the estimations will get you on paper.
I use Applied Ballistics on the Kestrel for careful shooting and Bullet Flight on the phone for quick and nasty calculations.
Help - Figureing out ballastic issues - Sticks - 07-26-2017
Thank you everyone for their help on this.
Trying to run before I've learned to walk properly.
Help - Figureing out ballastic issues - LR1955 - 07-26-2017
Sticks Wrote:Thank you everyone for their help on this.
Trying to run before I've learned to walk properly.
Sticks:
Not really. You are simply falling into the technocrat trap. Not seeing the forest from the trees.
Your target at 700 is two minutes. 14 inches. In your first post you said the differences between the various programs was .2 mils. .2 mils is about 3/4 of one minute. Any of your programs would give you a hit on the target somewhere and apparently all of them are pretty much center.
If I were you and I couldn't get to that exact range and shoot that exact target, I would average the differences in your programs and use the result for an elevation. Just understand that no matter what one of the computer programs spits out, your particular rifle and ammo combination may not match up.
If you go into your competition focused on the insignificant differences of elevation between your computer programs, you will not perform well. And most likely you will not be real happy about it.
Use the computer for what it is worth, a pretty decent estimation of elevation. Then you are allowing yourself to focus on the important things that are more likely to bring success. Such as position, wind doping, the shot(s), and maybe even spotting trace through your optic which is quite possible with the Grendel.
LR55