I watched an old gentleman shooting his flint fowling piece, using 3f for both the load and the prime. Seemed the ignition was pretty much instantaneous. It was easily as fast as my Lyman GPR percussion rifle. The flash channel is more important than the granulation of the priming load.
Dan
"It's a source of great pride, that when I google my name, I find book titles and not mug shots." Daniel C. Chamberlain
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