Re: *Announcing the 2009 Sniper's Hide Build Rifle *
I shot the SH 260 rifle yesterday with all the test loads. I had some great results. The wind was blowing off and on with some switching mirage when looking through the scope. It was coming from my 4 to 5 o'clock at 5-15 mph. It shows in the groups, since they all string horizontally. If I could shoot them over on a more calm day, there is no doubt the groups would be tighter. Overall, the rifle shot very well, and would be a great rifle for precision shooting.
Here's the velocity readings and info I have on the test loads. Temp was about 65 F. Scope was a NF 5.5-22. Chrono is a CED M2 at 15 feet, shot in the prone position. My aiming point was the lower right diamond, and I moved the groups around by dialing the scope.
All were 5 shot groups shot at 300 yards
Brass: New Remington
Bullet: 139 Lapua Scenar, BC= .615
Load A and B were shot in the same spot, and printed 8 bullets into 2", with 2 called fliers. I couldn't tell which was which.
Load A
2565 fps avg 31 ES, 10.6 SD
Load B
2587 fps avg 13 ES, 4.0 SD
Load C
2.75" group
2603 fps avg, 13 ES, 5.0 SD
Load D
5.25" group (4 shot 2.5" group), bad horizontal spread. 1.25" vertical
2626 fps avg, 13 ES, 4.0 SD
Load E
4.6" group
2630 fps avg, 26 ES, 8 SD
2622, 2629, 2624, 2629, 2648
if you omit the 2648 round, then avg is 2626 fps and 7 ES
Load F
3" group spread horizotal.
2646 avg fps, 2 ES!! (4 rounds)
(I forgot to turn the chrono on for the first shot)
Load G
3" group (1.6" 4 shot) spread horizotal.
2672 fps avg, 26 ES, 8 SD
2672, 2684, 2672, 2658, 2678
if you omit the 2658, then you get 2676 avg and 12 ES
Load H
1.9" group with 3 bullets touching (Group is above bottom left diamond, not labeled)
2701 fps avg, 18 ES, 6 SD
2692, 2697, 2706, 2710, 2702
I tried Hybrid 100V, and got 2566 avg and 2594 avg. It shot good, but velocity is not there.
I think load F, G or H may be it. I may try some more powders, or see if I can get a few extra fps with it.