You're right Cay...

I bought a couple bags of MMP-12s and MMP-24s...Also bought some Hornady .451 250gr XTPs and 300gr XTPs....I had high hopes, but my gun just didn't like either of these....It would have been nice if this would have worked....

For years I shot 100 grs of Pyrodex R-S or Goex FFF and a 300 gr Barnes (gun didn't like the 250 Barnes either)...

I changed to a 250 T/C Shockwave (didn't like Hornady's, cause the sabots were different, didn't like 300s)...and 90 grains of Goex or Pyrodex...

Its funny, I've shot flintlocks for over 30 years, inlines for 10 or so, to me, its easier to work up a good load for a flinter than an inline...