So until today I had not developed a load for my AIAE Mk III. I am running the AINA 1/10 18” Barrel.
I had some .308 loads worked up for a different rifle, which worked ok with 1-moa’ish results. In the mayhem of reloading scarcity I picked up a few boxes of FGMM 175 loads which shot 3/8 MOA. This motivated my load development.
On to the test,
175SMK
Varget 42.3-45.0
Hornady match once fired brass, FL Sized, Trimmed, Prepped
FGMM LR Primer’s
COAL 2.800”
I am new to interpreting OCW results as a new user. I was impressed the entire range of loads shot within MOA mostly.
I hit some pressure signs at 44.4 concluding with a sticky bolt on 45.0. Although I wish the 45.0 load would have worked, as it was basically a dead ringer and probably has some good velocity behind it.
From 42.6 to 43.8 all shot very similar minus the round I pulled. Although 42.9 and 43.5 trend left POI. 42.6 shot identical to the FGMM 175 but were too close on the low side to 42.3 which scattered. I am inclined to interpret the results as loading to 43.0 grains (to make it easy) would be a pressure tolerant load. That gives enough change from 42.6-43.8 to fall in the same accuracy realm.
I have other head stamps, which will be used in the future such as Winchester (WIN) and a gaggle of once fired Federal (FC). What is the best way to pick a load which should work across the spectrum?
Thanks
I had some .308 loads worked up for a different rifle, which worked ok with 1-moa’ish results. In the mayhem of reloading scarcity I picked up a few boxes of FGMM 175 loads which shot 3/8 MOA. This motivated my load development.
On to the test,
175SMK
Varget 42.3-45.0
Hornady match once fired brass, FL Sized, Trimmed, Prepped
FGMM LR Primer’s
COAL 2.800”
I am new to interpreting OCW results as a new user. I was impressed the entire range of loads shot within MOA mostly.
I hit some pressure signs at 44.4 concluding with a sticky bolt on 45.0. Although I wish the 45.0 load would have worked, as it was basically a dead ringer and probably has some good velocity behind it.
From 42.6 to 43.8 all shot very similar minus the round I pulled. Although 42.9 and 43.5 trend left POI. 42.6 shot identical to the FGMM 175 but were too close on the low side to 42.3 which scattered. I am inclined to interpret the results as loading to 43.0 grains (to make it easy) would be a pressure tolerant load. That gives enough change from 42.6-43.8 to fall in the same accuracy realm.
I have other head stamps, which will be used in the future such as Winchester (WIN) and a gaggle of once fired Federal (FC). What is the best way to pick a load which should work across the spectrum?
Thanks
