Author: britrifles
Subject: 1950 mk7 DA
Posted: March 19 2022 at 2:02am
Subject: 1950 mk7 DA
Posted: March 19 2022 at 2:02am
 Olddust wrote:If “crimping is detrimental to accuracy”, not crimping the 7.62 loads I made up would make them shoot even better? The 39.5 grain load was 1-1.5 moa and the 40.5 was 1.0 moa What improvements should I expect with not using my collet crimp die? |
You may get sub-MOA groups. When the barrel in my .303 Fulton No. 4 was fairly new, it gave 10 shot groups off the bench under 1 MOA with handloads and no crimp. With crimp, just over 1 MOA.
The crimp die will give varying amounts of crimp (neck tension) depending on case length. Variability is detrimental to accuracy. You will never see a bench rest shooter use a crimp die.