The "Good" gunsmith idea is a good one. I've seen pictures of cross sections of early breechloaders opened to 2 3/4", which leaves a too-thin area in the chamber where the early gun outside taper came in towards the bore. That extra 1/4" in length made a big difference - it showed.

It is easy to shorten 2 3/4" to 2 1/2". Roll crimp heads are available for dril press or hand drill operation.
Lyman used to make them and Will Bilozer of Alberta makes one for sure.

If you don't handload - there's a lot of rounds in a pallet.