06-05-2020, 08:14 PM
So after finding disappointing amounts of drop with Benchmark, I tried loading up a similar load with AR-comp, and the accuracy was good at first with lower charges, but as I worked up towards 28gr it spread out to about an inch larger grouping.
Something I noticed while loading the rounds was that I was getting some very minor compression at 27gr, and enough to noticeably effect the seating depth at 27.5gr. I didn't adjust my seating die, but I did end up with about .005" extra length on the OAL. Could that depth be causing my accuracy problems? Or should I start looking at a different powder?
Something I noticed while loading the rounds was that I was getting some very minor compression at 27gr, and enough to noticeably effect the seating depth at 27.5gr. I didn't adjust my seating die, but I did end up with about .005" extra length on the OAL. Could that depth be causing my accuracy problems? Or should I start looking at a different powder?