Like Muskrat Mike, i shoot 3F. I think it fouls less. I agree that it is one of the best hunting and shooting calibers, good ballistics per weight. I started with 80 gr. at 50 yds and the rifle was dead on first time shot. I saw no reason to experiment further. I do have a small jaeger style folding leaf rear sight that i filed to shoot dead on at 100 yds. I'm happy with it and have been shooting it pretty regularly since the early '90's.
I have heard often, here and elsewhere, where guys say this or that powder fouls less. I've never experienced this myself, since switching (back in the mid 1970's) to the load combinations
we still use to this day. That generic combination is a ball that is .005" smaller than the bore and a .020" to .0225" patch, usually denim = easy loading.
There is no fouling buildup, no noticeable fouling at any time, whether using 3F or 2F or even 1F. The gun loads the same, shot to shot, no wiping, no matter what powder granulation is used
thus there is no 'fouling' noticed.