I have some 1 1/2 Ff black powder...

[rickevans]

I have come into some 1 1/2 Ff black powder.  Good (great) price thought i could use it for my fusils (62 cal).  Wnyone ever had opportunity to try it out? 

[Winter Hawk]

I've never even seen 1 1/2 Ffg, but it should work well in the larger smoothbore.  It might be too course and leave a lot of fouling; only use will tell.  We would of course, appreciate a detailed report on what you find out!

~Kees~

[Butler Ford 40]

Perfect for big bore cartridge rifles, should be about right for your 62

[RobD]

I stock and use only 3F and 1-1/2F Swiss black powder.

3F for ALL flintlocks, in both tube and pan, whether .32 or up to .62 in bore size.

1-1/2F for the .45-70 PPB (paper patched bullet) cartridges for Sharps falling block and Remington rolling block rifles.

1-1/2F works just fine in any flintlock, too, and have used it with flinters of all bore sizes.

For the very most part, back in the 18th century, the most common gunpowder was grained to about 1F at best,but I'd say that coarser cannon grade was most prevalent.  "Very fine" powder was at best 2F, and reasonably rare to find unless coarse powder was wetted and ground or screened finer.