I have had a .30-06 rebored to .35 Whelen by Randall Redman and two .357's rebored to .44 Special by Cliff La Bounty. All three shoot extremely well, JES has an excellent reputation as far as workmanship. While I have yet to use JES, I understand that their turn-around time is amoung the best, sometimes little more than a couple of weeks. I waited 6 months or more for my REdman and La Bounty rebores.