Using the grease that came with my Dillon, and Tightgroup is not a powder I like. I'm still able to go a long while without cleaning.
Last Wens. night the guy at the safe table next to me says it's been about 300 rounds since he cleaned it, and he hopes it will run. I laugh, say I 've gone about 2000 rounds, and won't be looking to clean for a good while yet. I lean over and look at his Caspian. Barely any soot. I lock my P-16 open and show him, you could make mud pies. Gun is still tight, smooth, and runs forever.
I did admit, that it does take a long time to get all the gunk out.