I've had 3 done by JES. A CZ from 30-06 to 338-06, an Interarms Mark X from 30-06 to 9.3x62, and a Rem 700 from 30-06 to 9.3x62. No regrets what-so-ever. If ever come across another Ruger 77 tang safety in 30-06 that uses Rem 700 rings and bases and has iron sights, I'll send it off to JES and have him rebore it to 9.3x62.
FWIW, on the last 9.3x62 rebore (Rem 700) I asked Jes to mark the caliber, et al on the underside of the barrel shank rather than stamp X's and remark on an exposed surface. In turn, I milled out the existing caliber marking and had that mill cut engraved with the proper caliber.
