Bullet Seating Question

[Brisco Darlin]

I just started loading 45 acp. i followed the directions for the crimp on the bullet seater. i'm loading 230 gr FMJ target rounds. a couple of the cases had a small horizontal crease after i seated the bullet. could i not be belling out the case enough before i seat the bullet? it only did it on a few cases.

 

[rdl65]

Did you check case length? Just a small variance will make a difference. If your dies were set using a short case, then the long ones will be crease when crimped. Try to find a happy medium.