Yesterday, I posed a question on the method to cut 45-90 cases to fit my 45-70 rifle. Several responses were received, to which I have chosen a method. My question today is what length would be best to first trim to. My chamber measures 2.114 inches and I plan to mostly shoot paper patched loads. What effect will fireforming and resizing have on the cartridge OAL. My experience with pp loads is to have the case dimension best matched to the chamber length. Most of my Starline cases have never been loaded, but some have been shot and resized in the 45-90.