09-12-2013, 07:47 AM
XcountryRider Wrote:Anything an amatuer like me can measure?
Cracked bolt lugs using naked eye sight. I think you just have a barrel with a tight bore or strange throat and bore that builds pressure differently, yielding higher mv. My 16" Grendel has spit out factory 123gr Scenars at 2583fps before, which told me something is wrong, as great as it would have been to have that speed. Temp sensitive powders can do that to you. When I clocked that load again during cooler weather, I had 2450fps with 7fps ES, & a nice grouping gun.