Anyone running a 22-24" 6arc in an ar? Looking at the ballistic advantage 24" dmr barrel, it's 1/7 twist which should be good to run some berger 109lrht through. Looking to see if anyone has some experience running a similar setup, wondering if you'd do it again, or maybe go to a 20-22" over the 24". I would really like to see 2700fps-2800fps.
The main purpose would be for gasser prs type shooting. Chances are i'll run some factory loads for a bit then start hand loading.
My experience is similar to
@TripleBull.
Gun is set up for PRS type shooting.
22” Rainier UM 7T. Just got back from the range. It was 96 degrees & heat index over 100 so I was a little worried about the Lever. Especially since I was trying to find upper end loads. Using Lever the SD’s don’t seam to get happy till the top end.
No issues with brass at all.
Edit: All these loads below except 95 Senecas are top end that I worked up to albeit in cooler temps.
109 Berger loaded 2.290/1.735 with 29.8 Lever = 2732 & SD of 6.7 for 8 shots.
108 eldm 2.270 29.8 Lever = 2780 SD 7.4
105 berger Hyb @ 2.270 30.0 Lever = 2782 SD 7.0
100 TGK @ 2.250 with 30.5 Lever = 2851 SD 3.8
95 Berger VLD @ 2.27 with 30.7 & 31.0 mixed the 2 on Chrono but combined avg = 2933 SD 12.8
All above was Lapua brass. Necks measure +.002 on loaded round & it holds tighter groups vs Hornady brass in my rifle.
Hornady Brass was shooting triangle holes and scattering 100g PVA Senecas so I figured I’d try worst case brass wise for the 95 Senecas.
Hornady Brass
95 Seneca @ 2.372 windowed mag fed 30.7 Lever
=2847 SD 24.5
All holes round even down at 2812 with 30.1g
Despite the shitty SD I shot 4 of the 2847 loads at steel @400y. 1st shot was over the plate using .281 G7 in Kestral. Hell kestral spit out 1.9 for 400, I dialed 1.8 & was over the plate holding center (10” plate). Held bottom plate & hit .4 mill high. Put 3 in 3” @ 400 shooting fast, but I need to get that SD way down. Lapua brass next time now that I know there stable.