M1 GARAND 30-06

[browningautorifle]

Hello Jim

Hey Eddie, I somehow wonder if maybe you're having a go at us again like the carbine you showed us...

But seriously, there have been replacement barrels for the M1 rifle in various calibers, other than .30 such as .308, 25/06, .270. That's a rebarrel though, not an ammo swap.