My wife and I went to the pistol range today. Had the bay to ourselves. I brought the chrono as I wanted to see what some 410 slug loads I was working on were doing. I am using a 148 grain .358 hollow base lead wad cutter in a shot sleeve. Cylinder bore 20" barrel. Minimum load for 1/2 oz. 1250 fps/514 fpe. These have been working at least to 30 yards without key holing. Now to start increasing the charge. While I was at it I ran 36 grain fed HV bulk through my 22-45 lite. 1064 fps so I can run them in the suppressor. Hit 1250 fps in the Charger so I need SV or SS for the suppressor. Aguila 40 grain Target went 1020 fps in the Charger. I made up some 45 Colt shot loads. 140 grains (1/3 oz) of #8 lead and they work very well in the 410. At 7 yards I had a dense 8" pattern. 12" at 10 yards and very even. They would make a good snake or rat load.