I was shipped the wrong barrel and considering keeping it but if I do I will want to rechamber it to something with less recoil. The barrel shipped was 6.5x47 and 8.5 twist. I ordered a 6.5x284 8 twist. I was thinking of rechambering this barrel to 6.5 Grendel. Is this possible? Would it be as simple as removing some material from the chamber end of the barrel and extending the barrel threads?