Ok guys go easy I am a new member lol. I have a similar issue with my build and I'm looking for input. I have a Kidd 18" threaded, bull barrel, not fluted that fit tight in a factory receiver. It has the BX trigger, its in a Magpul stock, and it's topped with a Diamondback 4-16x44. I am, IMO a decent shot and have especially shot a lot of 22LR stuff but it has all been in a factory Ruger American and this 10/22 before I succumbed to modifying it. After carefully installing the barrel and having a little fun I set down to do some real work and have so far tried Winchester 36gr, Aguilla 40gr, CCI mini mag 40gr, CCI mini mag36 gr, CCI standard velocity 40 gr, Federal Automatch 40gr and I also tried that CCI copper-22 21 gr for fun. Each ammo was shot from a rock solid prone at 50 yards and no wind. I shot each one approximately 5 groups of 4 shots and struggled to keep it under an inch. my best grouping was basically a tie between the Federal, the CCI Standard velocity and the CCI Mini mag 40 gr. Federal shot a 5/8" and the CCI shot a 3/8" but only once and the next group might be 1" or slightly more. I am aware that switching ammo effects accuracy and it was indeed visible in the first two groups after switching ammo. I am wondering what to do next. Should I try top notch ammo like Ely or Lapua or something? Besides the fact that Ely has such a wide variety of selections and I'd have no idea which one to try first, I hesitate to try expensive ammo because it seems like some others are getting far better accuracy out of similar rifles with the more basic ammos. I have a friend who has a some random semi auto 22 that I can't remember right now and all he did was put a heavy barrel in it and is getting groups that almost touch at 50 yrd with the same federal ammo I used. So guys what should I do...