mongoosesnipe Wrote:i think you may have mixed up minutes and mils in your drop estimate
123 sst calculated at 2400fps
Range Drop Drop Windage Windage Velocity Mach Energy Time Lead Lead
(yd) (MOA) (mil) (MOA) (mil) (ft/s) (none) (ft•lbs) (s) (MOA) (mil)
0 *** *** *** *** 2405.6 2.155 1580.3 0.000 *** ***
100 -0.0 -0.0 0.8 0.2 2239.6 2.006 1369.7 0.129 21.7 6.3
200 -2.6 -0.8 1.6 0.5 2080.0 1.863 1181.4 0.268 22.5 6.6
300 -6.0 -1.8 2.5 0.7 1927.3 1.726 1014.3 0.418 23.4 6.8
400 -10.0 -2.9 3.4 1.0 1781.8 1.596 867.0 0.580 24.4 7.1
500 -14.4 -4.2 4.4 1.3 1644.5 1.473 738.5 0.755 25.4 7.4
600 -19.5 -5.7 5.5 1.6 1516.4 1.358 627.9 0.945 26.5 7.7
700 -25.1 -7.3 6.7 1.9 1398.8 1.253 534.3 1.151 27.6 8.0
800 -31.5 -9.2 7.9 2.3 1293.5 1.159 456.9 1.375 28.9 8.4
900 -38.7 -11.2 9.2 2.7 1202.2 1.077 394.6 1.615 30.2 8.8
1000 -46.7 -13.6 10.5 3.1 1126.5 1.009 346.5 1.874 31.5 9.2
also i would range whitetail from biscuit to back because if it is standing in the grass you will be guessing at the ground height similarly with humans it is best to mil from crotch to head as one meter as most height variation is in the legs
also the calculation is easier if you measure target in yards..
(height in yards/mil)*1000= distance in yards and since your multiplying by 1000 you can just move the decimal 3 places which is easier to do in your head compaird to multiplying by 27.78
so assuming a 18 inch chest on a deer which is 0.5 yards
(.5 yards hieght/ 5mils)=.1 *1000= 100 yards
(.5 yards/4mils)=.125*1000= 125 yards ...
using deer chest
5 mils=100 yards
4 mils=125
3 mils=166
2.5 mils=200
2 mils=250
1.5 mils=333
1 mill=500
honestly past 300 you are getting to the point where exact yardage is becoming more and more important if you want to shoot at deer past that i would recommend a rangefinder and a nice scope with zero lock and good repeatable turrets
MGS:
Nope. I didn't confuse mils with minutes and my table is giving come ups (elevation changes) like yours does. In fact, the two are almost identical.
Your table shows a come up between 100 and 200 as 1.6 Minutes. Mine is 1.5 minutes. Yours shows a come up between 200 and 300 as being 2 1/2 minutes. Mine is 2 1/2 minutes. Yours from 300 to 400 as 3.4 minutes and mine as 3.5. Yours from 400 - 500 as 4 1/2 and mine as 4 minutes.
Mine is based on a BC of about .5 at about 2550 which is a decent mean when a guy is using a relatively well designed bullet at a relatively slow speed. As I said before, all decent small arms have close to the same trajectory to 300 and once you get to 500 you start seeing some differences. Past 500 and you see much bigger differences.
I would not use a cheat sheet in this situation. It isn't necessary. And, the table that MGS produced showed how easy it is to mistake things like come ups with bullet drop, minutes with mils, etc.
Memorize one or two key pieces of information and practice them on a range to make sure they are workable when you are under stress. You would be amazed at how complex some brilliant ideas are when a guy tries to implement them! I will always test a 'brilliant idea' first. And by doing so, I normally find out it wasn't so brilliant after all.
LR1955