Ok, so how much brass are you actually cutting, here? Are you talking .050", .300", or ? When I form 30 Herrett cases, I have to cut off almost .4", so a hand trimmer is out of the question. Also, due to ridiculous Indiana law, I'm considering a wildcat that would be based on the 356 case, shortened to 1.625", which would require a lot of neck to be cut/trimmed. As Uncle Nick said, be sure to look at your neck thickness and be prepared to ream cases to get proper neck tension. I have to do that on the Herrett, as well.Thanks guys. That all looks like good advice. I may try several of your ideas. I have an arrow cut off saw so I may start using that.
Broom Jm, the cartridge is based on a 308W cartridge with the shoulder set back .100 and an AI profile and shoulder angle. I assumed that setting the shoulder back would extrude the brass somewhat causing the over all length to increase, hence the need for the trimming. The idea behind the cartridge is to increase the power potential of a Marlin 336 while reducing bolt thrust. I've fooled around with the 307W cartridge in Marlins for the last several years and the first limiting factor appears to be bolt thrust. Anyway, it is just an experiment. We are calling the cartridge the 30 Lever Maximum (I hope I'm not plagiarizing anyone else's nomenclature.)