This is at 30 yards, seated position, elbow resting on my shooters table and thumb on one of the pillars to steady the rifle. Frankly I get better groups at 100 yards with the same ammo in my 22/45 .22 pistol.
I've read some and found some people got great groups with their uppers, others not so much. I've found that there are two what seem to be plausible issues. One was that some barrels had microscopic imperfections and a Hoppes Tornado brush and some light polishing compound with a drill in the barrel solved the issue.. this seems like a bad idea to me, isn't that going to kill the rifling? the other was that some of the barrels left the factory without a proper barrel crown. I took my flash suppressor off and checked the crown, the barrel is recessed but it doesn't appear to have a proper crown on it. I plan on taking it to dobbs to solve this issue, but could an improper barrel crown really cause this much inconsistency?
I bought the upper used and there was a bunch of what seemed to be lead fouling inside the recessed area at the end of the barrel so I'm going to pop off some more rounds at a target tonight and see if that might have helped some. Any other advice as to possibilities and/or solutions? I have a PSA 9mm AR and I can put holes on holes at 30 yards with my cheap tasco red dot, and get about a 4 1/2-5" group at 100 (I really cant see that far without a magnified optic. My eyes are horribly bad, I get better groups with a scope) Target for reference is an 8"
