what are you using & where are you getting it?

For example:
the only 4F for pan priming I can find is Goex, none locally.

With that, I might duplex 5 grains with Triple7 2F as a main charge.

4fg goex. Bought it at a local mountain man store near colorado springs back in 2006. It lasts a LONG time.

that was my plan but none available within 100 miles which means 1 lb will cost @ $65...

wondering about 3f Triple7 as a pan primer?

btw, what is your main charge?

Depending on the rifle my charge is 80 - 100 gr of FFg. You can get by easily using just FFFg as both your main charge and your pan. Give it a shot!!

MP...

FFFg will work as a priming powder, but the granules are larger so it won't trickle from a charger very well. You may have to use a small horn or another device as a pan charger and put just a few grains in the pan, don't fill it up!! If the vent hole is on the small side you may not get good ignition and may need to open it a bit or replace it with one that has a larger hole (.068-.078) is good.
There have been a number of studies and observations made to prove that 4f is faster than 3f when used as a priming powder and it is faster by 1000ths of a second. The difference is so miniscule that it's indiscernible.

BPS

Using T7 in the pan would be like spitting into a 100 acre forest fire.

In my flintlocks, I use 2fg goex or olde eynsford.

You know you can order around 5lbs of the real stuff for around $125-135 shipped right? Mix and match powder grades as well.

graf & sons, powder inc are two of the main places folks order from.

I use 4f Goex. But if you can't find that 3f will work fine. But use black powder only. The sub powder just have too high of a flash/ignition temperature to work.

So, T7 as a pan primer is out altogether?

How about as a main charge?

out & out.

MD's correct... save the sub-powders for the percussion and in-line guns. When you think flintlock, think BLACK POWDER ONLY!!

BPS