Just buy a Montana in 243 or 257 and send it to JES reboring and have him bore it out for the creedmor…..thats my next project. You'll be at or even maybe less money than buying the 18" Adirondack.
I'd make sure a Creedmore reamer would clean up the old chamber before I invested any money. I don't think it will, since the 243 is longer and the 257 is a lot longer.
