02-19-2018, 02:34 AM
I guess the day could be considered successful given that the wind was a gusty 20-25 mph and I have some winter rust. Confirmed velocity of the "light" 25.3 gr Benchmark load (27 is Hodgdon max) at 2956 sd 6 es 21 with 7 shots. Given the wind, I'm pretty happy with how the 70 gr Varmageddons grouped. The group in the left was 5 shots and the right was 6. Both are right about MOA
[ATTACH=CONFIG]11100[/ATTACH]
10 mph of wind = 0.8" at 100, so with the way it was bouncing around today, i would attribute quite a bit of the horizontal stringing to the wind. I also set up right next to the wall with it on my left with a left to right wind (had no choice - it was busy) so I couldn't feel the wind and wait for lulls like I normally would, so there's also likely a bit a aerodynamic jump differential in there too.
Did very good on 6" plates at 350 and 450 and reasonably well at 550 given the target is a little over 2mph wide out there - misses weren't by much. Flat based bullets didn't seem to have more wind drift than projected - was holding same wind values for 120 gr scenars out of my 18" Grrrrrrrr.
25.2 gr of Benchmark with the 70 gr NBTVs shows even better promise. 5 shot 2954 sd 9 es 26 but accuracy potential seems better. This was with the Magnet to on and it may have shifted. There was also of course the wind.
[ATTACH=CONFIG]11099[/ATTACH]
MOA in total but the 3 on the right are < 1/2 MOA. Usually a group like that during development with Magnetto on does much better with it off (knock on wood)
Gonna work up a bunch of those to see how they do. Those are seated at 2.310 which is ASC mag length + a little wiggle room - and they are off the lands. Fits in the case real nice. Bearing surface protrudes just below the neck and the little spitzer boat tail doesn't really protrude much below the shoulder. I only went up to 26 gr and got 3068 sd 12 es 30 vs Hodgdons 27 gr max at 2960.
And on a Grendel note, I did manage a few hits out of my 18er at 1016 once I figured out what the jetstream was doing. Nothing like holding for 16' of wind on a 16" plate at 1k and getting 2 in a row
[ATTACH=CONFIG]11100[/ATTACH]
10 mph of wind = 0.8" at 100, so with the way it was bouncing around today, i would attribute quite a bit of the horizontal stringing to the wind. I also set up right next to the wall with it on my left with a left to right wind (had no choice - it was busy) so I couldn't feel the wind and wait for lulls like I normally would, so there's also likely a bit a aerodynamic jump differential in there too.
Did very good on 6" plates at 350 and 450 and reasonably well at 550 given the target is a little over 2mph wide out there - misses weren't by much. Flat based bullets didn't seem to have more wind drift than projected - was holding same wind values for 120 gr scenars out of my 18" Grrrrrrrr.
25.2 gr of Benchmark with the 70 gr NBTVs shows even better promise. 5 shot 2954 sd 9 es 26 but accuracy potential seems better. This was with the Magnet to on and it may have shifted. There was also of course the wind.
[ATTACH=CONFIG]11099[/ATTACH]
MOA in total but the 3 on the right are < 1/2 MOA. Usually a group like that during development with Magnetto on does much better with it off (knock on wood)
Gonna work up a bunch of those to see how they do. Those are seated at 2.310 which is ASC mag length + a little wiggle room - and they are off the lands. Fits in the case real nice. Bearing surface protrudes just below the neck and the little spitzer boat tail doesn't really protrude much below the shoulder. I only went up to 26 gr and got 3068 sd 12 es 30 vs Hodgdons 27 gr max at 2960.
And on a Grendel note, I did manage a few hits out of my 18er at 1016 once I figured out what the jetstream was doing. Nothing like holding for 16' of wind on a 16" plate at 1k and getting 2 in a row
Let's go Brandon!