10-09-2021, 01:39 AM
took my ARC to the range today for its first outing. Had ejector swipes on the Black 105's (averaged 2724 fps, 9.2 SD over 20 rounds), but not on White 108's (2679, 15). Had time for 1 5-shot string of handloaded 107 SMK's over CFE223 in Starline Grendel brass - 2402, 10.9.
Called Berger tech support the other day to talk about loads with their 105 or 108 bullets, and speed ran between mid 220's and mid 2400's for each. To me, that would seem to suggest that the Hornady factory rounds are a little hot, maybe more appropriate for a bolt rifle? And that my SMK load was in the correct ballpark.
Should note my upper is from Sanders Armory and has a 20" barrel.
Called Berger tech support the other day to talk about loads with their 105 or 108 bullets, and speed ran between mid 220's and mid 2400's for each. To me, that would seem to suggest that the Hornady factory rounds are a little hot, maybe more appropriate for a bolt rifle? And that my SMK load was in the correct ballpark.
Should note my upper is from Sanders Armory and has a 20" barrel.