Comments on: New Info Site and Case Trimmer Tool from PMA Tool

By: Pat

Pat — Sat, 13 Oct 2012 18:46:19 +0000

The lathes I use in the video are a Benchrite Case Lathe and a Sinclair Case Prep Unit.

I absolutely agree, headspace is critical to trimming cases when indexing off the shoulder, but it’s also critical to safety and accuracy. If your sizing dies aren’t holding headspace within .001″ it’s either time for a new batch of cases, time to anneal or time to try a different die because something’s not right.

By: pdice

pdice — Fri, 12 Oct 2012 03:12:21 +0000

Good point. Whose lathe is that?

By: P1 Zombie Killer

P1 Zombie Killer — Fri, 12 Oct 2012 03:03:12 +0000

I use PMA cutters and shell holders. If this tool is as nice as their other products, I will most certianly be getting one.

By: Mike

Mike — Thu, 11 Oct 2012 23:06:42 +0000

IMO, this is a better advertisement for the lathe(which is very nice) than the trimming tool.
The tool is reliant on headspace, right?
If so, given headspace is typically the largest variant in sized cases, wouldn’t this tool cause trimmed length variances that we wouldn’t have otherwise?

EDITOR: Mike, you raise a good point. This tool is to be used with “properly fire-formed and full length re-sized case” according to PMA. With a good die and quality press, you should be able to hold .001 headspace uniformity on full-length sized cases. That means your trimmed case lengths, indexing off the shoulders, should likewise be within .001, or very darn close.