With an unloaded weapon, safety off, open the bolt draw to rear, press and hold trigger, and try to remove bolt. If that does not work, see a gunsmith.
They did make .270 barrels for conversions of other firearms, but I'm unable to find any references to them ever manufacturing a bolt action .270.
There is a button at the beginning of the breach that you pusy in and the bolt will pull straight back out of the breach.
You can download a manual for free at browning.com
I have a 270 firearms international .I think it's 1954 but no model number. All i see is 20 on all three spots Berle and the center. my dad bot-it 1954 for 275$
Try gun shops, gun shows, pawn shops, want ads, for sale ads, egunparts, estate sales, garage sales, Shotgun News, etc.
You have a browning a-bolt rifle chambered in .270 winchester caliber.
300 USD
50-450 usd
Torque Setting for VS Commodore Harmonic Balancer Bolt- between 270-320 NM. The Best way is to check the bolt torque setting before you remove it.
You need the services of a gunsmith.
To find a bolt for a 270 model 770 engine, you can do so by looking at junkyards. It is possible that the parts may not be found online, or through manufacturers.
If you are asking this question, you should not be removing the bolt from this rifle. If you do not get the bolt locking pins back correct you could be holding a bomb when fired. There are sporting rifle take down books that show the take down for the 7400. best of luck