I put a McGowen varmint barrel on my Savage .223 in May of 2015 and it is already 'shot out'. (big grin here) The barrel has been a real good shooter with ragged hole accuracy and cold barrel one shot hits on rock chucks 487 yards away. I've got about 2000 rounds down the tube. Now that the lands are shot out another 1/10 of an inch from the original long throat I'm talking to my gunsmith about cutting off a thread or two and cutting a new chamber to get close to the lands again. McGowen tells me that the original chamber was cut with a standard PTG 223 reamer. The gun is used primarily for varmint hunting and the groups are opening up a bit and I can't reach the lands any longer due to magazine restrictions. My question is whether there would be any advantage in going with a match reamer vs the standard reamer to cut the new chamber. I assume that if I did that I could well wind up pulling the bullets on all of the rounds I now have loaded to resize cases because they may not chamber. (I neck size only). I recently built a case annealer to try to get consistent neck tension on my seated bullets and to help extend the life of the brass. It looks like the match chamber has slightly smaller dimensions than the standard chamber so I would think that expansion and contraction would also be reduced. Let me know what you think. Thanks ahead of time.