Yes, I've used 3F, but quite a while back. I didn't contain it. I just laid the ematch on a 3" to 4" long piece of duct tape, creased it, pored the powder over the ematch and squeezed the tape together to seal it.
I did not see a significant difference in the power/gas pressure from the ejection. Now I never did comparative ground tests, and I suspect I had sufficiently large charges of both types that ejection was good with either.
What I did notice is that my nomex chute protectors had a lot more small burn holes in them when using 3F then when using 4F.
I've also found that putting the powder in a holder, I use copper pipe caps, and holding everything in with dog barf and masking tape makes for a noticeably stronger ejection.
Hope this helps.