Triming Cases

[J.B.]

Sam I use the Forster trimmer and find it works fine. Initially I ordered a custom collet (.622") for my 45/70 trimmer...and then found their Classic trimmer has four larger collets for some of the Sharps and larger express cartridges. The No.7 collet in the Classic Trimmer works a treat. I also ordered two different pilots via their custom order section on the website. Very happy with the result.
Having said that... I cant see myself trimming my Jamison brass at all as it's right on 2.25 at the start and fireforms down to 2.248-2.485). The RMC brass I ordered long so I could trim it back and comfortably trimming back to 2.266 - 2.271 without issue. The RMC brass barely dropped back at all in length on firing. It may or may not be of interest...but on fireforming the Jamison brass.. the case volume increased to the tune of 4.5grns of 1.5 Swiss.. so there was a lot of 'filling out' that occurred in my chamber. Had I not had three Forsters... I may have considered the Wilson...but so far I've been happy with what I've done. Hope this helps.