I've built my Grendel with a Lija 20" barrel, Giesselle SSA-E, and Vortex 6-20. I've been shooting 123 A-maxes with 8208xbr and looking to get 1/2 moa. Shooting the factory Hornady 123 A-max I can get about 1" or a little bigger. (bottom right group) On this target I've loaded 28.3gr, 28.5gr, and 28.7gr. 28.5gr seems to be the better of the three loads. C.O.L. was the same as factory Hornady, 2.245 and Win small primers were used.
I shot 4 groups of 28.5gr yesterday and all groups were 2 inch or better. Today, one group of 28.5gr seemed to group somewhat consistent to the Hornady load.
Velocity for 28.5gr averages 2473 fps, on this target it was shot last and velocity averaged 2503 fps. The factory Hornady's load averages 2485 fps.
Sounds like everyone has good luck with 28.5gr except me, can anyone help?
I shot 4 groups of 28.5gr yesterday and all groups were 2 inch or better. Today, one group of 28.5gr seemed to group somewhat consistent to the Hornady load.
Velocity for 28.5gr averages 2473 fps, on this target it was shot last and velocity averaged 2503 fps. The factory Hornady's load averages 2485 fps.
Sounds like everyone has good luck with 28.5gr except me, can anyone help?
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