By: Grimstod

Grimstod — Sun, 17 Apr 2016 12:07:16 +0000

I can see how case heads can be out and cause inconsistent trim lengths. So for those shooting a untrued Remington style rifles looks like indicated off the shoulder is best. For those of us with concentric chambers and trued up actions measuring from the base sounds best though slower.

By: Boyd Allen

Boyd Allen — Sat, 16 Apr 2016 19:17:32 +0000

I have one of the PMA trimmers and it is a great piece of equipment. They come with a carbide cutter, and are very easy to adjust to tight tolerances. Mine has a carbide turning mandrel, and I got the best expander that I have seen for expanding up .220 Russian cases to 6mm. It is carbide,and has a long taper. With proper technique, I can expand up without increasing runout, something that I had not been able to do before. Their expander die design is superior to others that I have, the mandrels have a thick flange at their back that shoulders inside the die, the mandrel is secured from behind with a large diameter set screw that is coaxial with the mandrel. This makes for a very square arrangement when compared with designs that use sets screws that are at 90 degrees to the mandrel.

Comments on: Helpful Advice on Case Trimming from PMA Tool

By: Grimstod

By: Boyd Allen