Mounting A Forster 3-in-1 Case Mouth Cutter on A RCBS Trim Pro

Fire4EffectCA

Sergeant of the Hide
Full Member
Minuteman
Nov 28, 2019
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Has anyone incorporated a Forster 3-in-1 Case Mouth Cutter on the RCBS Trim Pro? I see the Forster 3-in-1 Case Mouth Cutter is designed for a.490" shaft diameter, but my RCBS Trim Pro shaft is 0.494” Any chance someone is offering a modified RCBS Trim Pro shaft to allow the attachment of the Forster 3-in-1 Case Mouth Cutter?

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Here is how I did mine.


Sell the RCBS and buy the giraud powder trimmer. Well worth the money!

I have a Giraud I purchased over a decade ago when I shot 50 BMG. It’s fast, but a PIA to set up. I find the uneven chamfer annoying. Too much play in Doug’s shell holders. I see some have solved this problem by having custom shell holders machined.

Btw, the guys over at the Accurate Shoot’s Forum provided an inexpensive method to ad the Forster 3 in 1 case mouth cutter to the RCBS Trim Pro. I’m good to go now.