I think the loose T7 fouls less and the cost is a lot less also. I do patch between shots because I find I get my best accuracy that way. You will see the "witness mark" move up if you don't clean between shots because the fouling reduces the volume in the bottom of the barrel forcing the powder up more. Not an inch after one shot though.

T7 is my sabot powder and I love it so much I put up with the swabbing between shots. There for I never get a crud ring or have to use a brush at the range.

T7 FFF is cleaner than FF I have also found.