Responses will vary. Personally, I wouldn't do it. A heavy blackpowder load in 1911 was 5 drams with 1-1/4 ounces of shot. Bulk smokeless topped out at 4-1/4 drams with 1-1/4 ounces of shot. I have no idea what the pressures were. Drew Hause or Dave Noreen will have more in depth info. I wonder what RST shells have for pressures. Good Luck!
