9 mm crimp size

#1 · August 15, 2014, 4:05 am

Hello could you please advise the correct size for the crimp on a 9 mm 124 grain round nose. My problem is that the bullet will not push into the case and the gun runs very well. But the bullet spins in the crimped case. Very strange.

#2 · August 16, 2014, 5:41 pm

Sound like too much crimp. Most people don't know it but too much crimp will loosen the bullets.

The correct crimp diameter regardless of bullet type or weight on 9mm is .375-.376"

#3 · December 4, 2014, 12:20 pm

So, basically it's a very very small or say light crimp. To much crimp and loose bullets are a possibility.