Alert readers may recall a thread I started awhile back about how much brass prep is necessay for M1 shooting. I had bought a bunch of LC brass from USSR (Don), and I sorted by weight until I had 25 cases all within 0.5 grains, then uniformed the primer pockets, reamed the flash hole, and turned the necks. I then loaded them with 46.5 gr I4895, a Federal match primer, and Hornady 168 gr. match bullet. Then I laoded another batch the same way with no brass prep.
The rifle is a 1950s H&R, glass bedded, rebarreled with a Douglas barrel, trigger job, NM sights, etc. by Roland Beaver.
Finally got a good day to do a comparison shoot. The loads chrono 2550 on average, with a standard deviation in the mid-teens.
The top target is prepped brass. Each is one 8-round clip from sandbags at 100 yd.
Unprepped brass gave a roughly 4" group extreme spread. Prepped gave me a hair over 2". Worth it? You be the judge.
The rifle is a 1950s H&R, glass bedded, rebarreled with a Douglas barrel, trigger job, NM sights, etc. by Roland Beaver.
Finally got a good day to do a comparison shoot. The loads chrono 2550 on average, with a standard deviation in the mid-teens.
The top target is prepped brass. Each is one 8-round clip from sandbags at 100 yd.
Unprepped brass gave a roughly 4" group extreme spread. Prepped gave me a hair over 2". Worth it? You be the judge.