@ Jolly1,
I have loaded .45 ACP with a full case of Pyrodex (compressed charge of roughly 37 grains) and the pistol cycled fine, although the report was lower and recoil was lighter.
Same thing with 7.62 X 39mm.
Keep in mind that many smokeless powders, such as Hercules Bullseye, take very little powder (by volume) to do the job and it is possible to double and perhaps even triple charge a case...
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