You try putting a .308 cal bullet down a .284 bore, on that action, and you'll have first hand knowledge of what a grenade going off in your face is like.
You basically have a 7x57, that has been re-chambered to 7mm-06/.280 Rem/ 7mm Express, and most likely not exact enough for any of them to work, even "IF" the rolling block could handle those SAAMI pressures.
You really only have two choices, leave it as a wall hanging '06 blank firing gun, or re-barrel it.

You basically have a 7x57, that has been re-chambered to 7mm-06/.280 Rem/ 7mm Express, and most likely not exact enough for any of them to work, even "IF" the rolling block could handle those SAAMI pressures.
You really only have two choices, leave it as a wall hanging '06 blank firing gun, or re-barrel it.

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