My mk85 loves triple 7. I usually swab it out between shots at the range but I still have a lite crud ring. You can really notice it if you take 2-3 shots without running a patch. then when you do run one down the crud area will really grab at your jag and patch.my only problem with triple 7 so far in my mk85 is that the knight breech plug grease will just about cauterize to the point that the breech can be tough to get out. one of the guys here recommended nosler 300 hr bullets. I got 50 and i'm heading to my hunting cabin this weekend to test em out.triple 7 is super easy to clean out of your barrel after you finish shooting.