by Seismic Sam on Tue Aug 01, 2017 7:33 am
The ONE thing you do NOT want to do is go down the road of trying to keep your bullets from moving by somehow "cooking up" a compressed load!!! It's not that compressed loads are inherently any more dangerous than non-compressed loads, but you NEVER, EVER, EVER, want to try to use the powder in a load to keep the bullet from setting back!!! There are ways to prevent setback with bullet choices, resizing dies choices, and crimp depth (i.e., a light .002" case mouth reduction for a 9mm vs. a heavy .005" case mouth reduction for a 500 S&W hot load.
In addition, it sounds like you are talking about crimp in a semi-auto pistol where the nose of the bullet is slamming into the feed ramp and causing the bullet to set back into the case. That could mean that you have a magazine and/or gun problem, and no amount of handloading tricks will fix something that is wrong with the gun and mag. For rxample, the feed ramps on some EAA pistols tend to be a bit on the short side, and a little dremel work on the bottom of the ramp can help a lot. Similarly, there is a hell of difference between high capacity mags with a plain oxide coating on the inside of the mag body, and a "more slippery" coating on the inner mag surface. The plain oxide coating may hold the bullet back until the full force of the recoil spring is brought to bear on the round, which then slams onto the ramp and into the chamber with as much force as possible. Sometimes putting 16 9mm rounds into a 17 round mag may solve the problem.
TO REPEAT: NEVER, EVER, TRY TO COOK UP A COMPRESSED LOAD JUST FOR THE SAKE OF KEEPING THE BULLET FROM SETTING BACK!!!