[Roundsworth]

Brian, I use my 1929 vintage Trojan 20 gauge for hunting only. I go through a few boxes of cartridges per year, and do not mind spending a few dollars more for RSTs or Polywads. My Trojan has 2-1/2" chambers. If I ever planned on shooting it a lot, I would simply load my own 2-1/2" cartridges. Most of my 'shooters', rifles and handguns, were made prior to 1900. For numerous reasons, I keep my handloads toned down a bit for recreational shooting. If I chose to hunt with any of them, I can bump the loads up a bit and still be safe. I am a firm believer in using the correct ammunition in my guns.

Added note: Today I procured a brass 3" 12 gauge shell with the Parker headstamp. I wonder how receptive an 1870s vintage Parker would be to firing a modern 3" commercial load.