I have over 800 rounds thru this rifle. With a patch the barrel seems tighter at the chamber end. I have reset the headspace to .043, floated the barrel as I said , and glass and pillar bedded both front and rear of the action ( I'm a machinist, so custom pillars are a breeze ). The crown looks good, going to give her a lap and see if this helps. The groups have came down some, from 7/8" to around 1/2" but I would think she should do better. Lilja is my next step.