I have yet to get my K-31 to shoot well. I do have hope.

I have hope, I have a 308 Savage action with an XC custom barrel I finally found a bullet/powder it not just like but really likes down to 1/4 inch groups. I would guess I have 2000 round through it and it was heading for a plant stake.

note: I am not impressed with XC and I am sure not impressed with Apache who uses a lot of those barrels. The problem with a dual sourced barrel is you don't know if its the chambering /threading or the barrel itself.