What kind of bolt gun? It may be possible to modify the bolt face to accept 30-30, maybe not. Depends on the design of the bolt face, extractor, and ejector. But 30-30 is a rimmed round, and rimmed rounds present problems when fed from a stacked magazine due to the rim. The new 6.8SPC has the same rim diameter as the 30 Remington, so that might be a good option if the rifle is strong enough.
Also, if the gun is not capable of taking a 308, don't try to chamber it for 307 Win either, as it has similar working pressures.