Pyro cartridge grade powder

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Joined
Nov 6, 2023
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Ohio
Straightening my reloading room I found two unopened cans of Pyro CTG grade powder. I opened one can and the powder looks and smells correct. I no longer reload BP type cartridges' and I'm wondering if I can use this volume for volume as a replacement for FFFG. Specifically in percussion revolvers.
 
I presently have no ML shotguns but do have rifles in 50 and 54, so either is possible. Looking at the grains of the CTG grade it looks to be smaller than RS but larger than P. That's why I was thinking a replacement for 3FG.
 

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