I have a die that will derim a 22 mag like the 22 spent case. The result is a 1.260 jacket. I use a Lee case trimmer with an 8-32 allen bolt turned down to fit inside the jacket to trim jackets. I chuck the case in a cordless drill and hold the trimmer by hand. So for the guys who sort this may be helpful.
My question is what length jacket do you use for what weight bullet or core weight to jacket length. I have the corbin swage kit that does fine with most 22lr jackets for HP bullets. I use a lee mold I drilled to make cores.. I have a lathe and mill so adjusting depths for core weight is no problem.