There is some research on the Mexican Powder stuff. It's just been over 35 years since I read it. Only thing I remember was it was domestic and very low quality. I had a reenacting acquaintance who was also the NMLRA rep in texas back in the70's. Deceased now. But he had several kegs of powder that the Republic of Texas purchased in the early 1840's. They came out of Galveston. And were of US mfg.
Founder Ancient Order of the 1895 Winchester
"Come, shall we go and kill us venison? And yet it irks me the poor dappled fools, Being native burghers of this desert city, Should in their own confines with forked heads Have their round haunches gored."
