07-25-2019, 01:59 AM
I'm shooting a 16" AA fluted barrel with 6.5 Grendel bolt purchase at the same time from AA a few years back. I'm just now working up loads and have found a load using 123gr hornady over 27.7gr of ARComp to group 5 round groups under 1" consistently at 100 yards single loading as I normally do during load development.
I moved to 500 yards and shoot those loads into 5" without difficulty, but when I mag feed, my group vertically strings 10-12". Horizontally the rounds fall within a 4-5" spread. Manually cycling loaded rounds I've seen no damage to bullet or brass.
I've tried no crimp, light crimp, heavy crimp and lapua and hornady brass but nothing has helped.
What do I try next?
I moved to 500 yards and shoot those loads into 5" without difficulty, but when I mag feed, my group vertically strings 10-12". Horizontally the rounds fall within a 4-5" spread. Manually cycling loaded rounds I've seen no damage to bullet or brass.
I've tried no crimp, light crimp, heavy crimp and lapua and hornady brass but nothing has helped.
What do I try next?