Jimmy: With any gun, try both 3F and 2F powders and see what seems to work the best. I found that when I began using fillers, and then an OP wad instead of fillers in my rifles, using FFg powder, I got much better compression, and the residue was much less- as little as I normally expect when shooting FFFg powder in the same gun, without the wad or filler. The downside of FFFg is that it does burn hotter, and will burn a cloth patch with the same volume of powder when FFg will not do so. Using the OP wad took care of the problems of residue size, and amount, as well as the burned and torn patches.
Some guns will just prefer one powder over the other. I had a friend who worked for a couple of weeks shooting FFg powder in his new .62 cal. rifle, and could not get a decent group. Then he used some FFFg simply because he picked up the wrong powder horn when heading out to the range, and BINGO! the gun started shooting good groups. He was astounded, and embarrassed, because he was one of those guys that kept preaching the old " rule " about using only FFg powder in those large caliber rifles. He had the targets he shot to show he was wrong, and actually, when he found out that the rest of were not laughing at him, or giving him a hard time, but were rather very interested in knowing that each rifle is different, he was very proud to admit he had been wrong!
So, try both powders in your guns. ( On the other end of the picture, I know one very good shooter who could not get his .36 rifle to work well until he accidently brought the wrong powder horn to the range and tried some FFg powder in the gun. Again, instant small groups! Who would have figured? )
Best wishes.