The original load that came out in the 20's or 30's was posted at 1330fps.for 3.750 dram and 1.250 ounce of shot.The older shells were paper and had fiber wads that shot a lot softer.A real nice load that works well in the field with these older guns is 3.250 dram 1.250 shot at 1220 fps or 3.5 dram 1.250 shot at 1250fps. These can be loaded with even fairly low pressures,if you like.