AJC1
Member
Look down through the top of the die with no ammunition installed. You can see the fingers move. I don't crimp hard with the collet die because you can generate enough force to deform the bullet. That is not something I try and do. I'm not a huge fan of crimping in rifle. But I have tube mag guns and it's important. I love a good roll crimp, probably because I started really crimping with 357 mag again in tube magazines. If you crimp hard your case mouths will have 4 lumps. It may not hurt anything but I don't like it.I noticed when I opened the collet crimp die package there were not any instructions included. I'm sure it's not rocket appliances but I will definitely have to figure out what works.