I bought a 5250 caseload of this stuff and all my .22 like it fine enough, and there is a mix of feeding types - a semi, a single shot, bolt action tube fed and bolt action mag fed. I did notice that the early groups were slightly unexplainable, but they started tightening up, and I am now 1/2 way through that caseload and have had 2 ftf, so I'm not complaining. I went out and picked up another 20k rounds.
I cleaned all the guns that I have been shooting thios with just last night, and did not notice any extraordinary filth.