I have a few M77's that have been re-barreled, some up to 3 times.
This is a straight forward job on a M77, much less involved that a M70, M700.
You might use your computer "search engine" an look for "rifle barrel makers" then see if they have "pre fit barrels" - this means they are short chambered and threaded so they may be fitted to a specific action. After being screwed into the action the chamber is finished reamed to provide correct head space. This type of barrel is considerably less expensive than an installed custom barrel, like 60-75%. A custom barrel installed will cost about $500.
The gun & shooting store, Midway might have some "pre-fit" barrels. .270's are real popular.
Last edited by BassMan; January 7th, 2017 at 10:43 PM.