Poper
Member
Has anybody done any primer comparison testing?
I have a decent load for my 6.5x55SM that is not near maximum. I ran short of RP 9-1/2 primers and substituted some MagTech 9-1/2's. What had been running a 130gn Berger at 2550 fps and producing 7/8" to 1-1/4" five round groups blew out to 5" on the small side to 14" on the larger side! Holy Moley!
Are the MT primers really that inconsistent? Or did the primer change the recipe that much?
Poper
I have a decent load for my 6.5x55SM that is not near maximum. I ran short of RP 9-1/2 primers and substituted some MagTech 9-1/2's. What had been running a 130gn Berger at 2550 fps and producing 7/8" to 1-1/4" five round groups blew out to 5" on the small side to 14" on the larger side! Holy Moley!
Are the MT primers really that inconsistent? Or did the primer change the recipe that much?
Poper