Help me decipher M70 barrel markings

[schmijar]

A lot of knowledgeable guys here, I'm sure i can get some insight with what is going on with this barrel.
It's marked normally as .300H&H, however just above the threads its stamped .300 Weatherby. Is this an H&H barrel that was rechambered to Weatherby? Any input is appreciated!

 

[MRBlack]

My guess is it has been rechambered to 300 Weatherby. Chamber cast would be your best and safest bet for a definitive answer

 

[KEC]

Yes, it was rechambered. I agree with the chamber cast for safety.