BP substitutes in traditional arms

[Mr. 16 gauge]

Just out of curiousity, has anyone tried some of the newer BP substitutes in thier traditional arms, esp. in flintlocks? I'm curious as to how well the work. WHile I will always be a BP guy, I think the day may come were it will be next to impossible for me to obtain real BP due to rules, regulations, shops closing, ect. I am specifically looking at Goex Pinnacle and American Pioneer, if that helps, and I'm wondering if these can be set off with a pan of the stuff in a flintlock, or if it can be set off with a ffffg priming charge in the pan. Thanks for any info you can pass along.......