The 44-100 caliber

[desert deuce]

Old Jim, if memory serves me correct the 44-100 RS was developed by Remington as a long range target cartridge and chambered in the Hepburn. The Hepburn was designed by L.L. Hepburn as a target rifle and the 44-100 for the same purpose. A later cartridge was also developed by Remington the 44-90 RS. I have rifles chambered for both.

I simply full length size the 45-100 case down to .44 makes the 44-100 case and full length sizing the 45-90 case down to .44 makes the 44-90 case. Best to anneal then full length size, then fire form with corn meal and then trim to length before the full charges are loaded.