All good suggestions Frank, did a barrel break in but not sure if it helped anything. Crown should be ok, not sure how to measure run out on the brass? Only have about 100 rds through it don't know how much copper fouling it could have. Do wonder about the stock, don't want to put another 2 or 3 hundred into it unless pretty certain will get an improvement in accuracy. Slid a dollar bill between the stock and barrel and slid it down to make sure it wasn't touching anywhere and it wasn't. Have read where people have done different things (metal rod, epoxy, etc) to stiffen up the plastic stock, may try that soon and see if it has any effect.