bowbender,I have a .45 and I've used FFG so far. I use 777 and I've checked with Hogdgon to see if FFFG would be better - the only difference I've seen is that the printed loads show a slightly higher velocity with FFFG - but it's not a huge difference. So I think either would work fine, but you might get a few more fps with FFFG. Hope this helps.