I do get a slight build up of a crud ring shooting Triple Seven 2f. Slight meaning I can feel it when I load, but it does not stop me from loading. When I change powders or bullets I like to swab a barrel clean, to be fair to the powder and the new projectile I am trying.
I really think that with the Pyrodex P it was starting to come around, but I was a little surprised with the group. And my other two White rifles shoot the Triple Seven 3f real good, but this Ultra Mag shoots the 2f fantastic.
I was a coward. After I saw that three shot group I have to admit, I was scared to try and make it five shot. Too many times I have tried only to blow a perfect group. But that clover leaf was sure a shock when I walked up to the target.