I have 500 Lapua cases to convert and been looking for the easy way to trim off the excess neck before finishing on my Wilson. Found it! $50 bucks Harbor Frt mini chop saw + 3d printed case holder jig made for the saw. $20. Spare blades $2. Cuts real straight. just a FYI in case there are any other masochist wildcat case formers out there who didn't know about this tool. The jig has a ball bearing +spring detent that goes into the extractor groove. The jig is adjustable for cutting length.

