I might be the new owner of one, thinking heavily about dolling out a .38-55, I hate recoil, I sold my competition skeet gun yesterday, just might roll the $ into another Shiloh, what is the good maximum range on a .38-55 or is another caliber under the .40-65 better
BPCRS in something less than a .40-65 would be a .38-55 which is the minimum recommended by Venturino / Garbe.
A .38-56 might be a much better "less than .40-65 cal." The .38-55 is a straight wall while the .38-56 is a bottleneck and will accept fully 10%+ more FF BP per cartridge. Depending on your cartridge recipe and bullet choice, your results may vary. Now, a .38-55 will get the job done at a BPCRS 500 M course, but not with any headwind component much more than 3-5 MPH. It will hit the ram, but not knock 'em over. A .38-56 with a heavier bullet and higher muzzle velocity should do better.
I had that happen to a Shilo 1863 percussion .45 rifle once. Finished shooting at range..usually ran a wet patch thru until I could clean properly at home..this time in a hurry..left breech closed after last shot. Got home and breech wouldn't budge..figured something must have broken.... sweating bullets with a stuck closed black powder fouled gun! sprayed some WD40 on top of block..and it popped right open..black powder fouling combined with that conant breech seal tied it up.