It would be a cinch for you to turn that into a 300 H&H yourself. Get a P14 bolt and rent a 300 H&H reamer and buy or rent belted magnum head space guages. Although it would be much better to remove the barrel and have it chambered in a lathe, you can chamber it by hand with it on the action. Then you will have to work on the magazine a bit and get it feeding smoothly. M1917 and P14 Enfield barrels are very tightly threaded into the receivers and many have cracked the actions trying to remove the barrels. Most people turn the barrel down at the receiver to relieve the pressure to insure they don't crack the receiver ring. This ruins the barrel anyway. Do it by hand yourself and enjoy the whole procedure.
Ooops I didn't see there were 5 pages. I thought I was the last poster!
