One approach to the current ammo shortage is to preserve the current calibers and use up less useful ammunition in practice. In my case, that means 7.62x54R gets used up in Mosins which are hardly useful for social purposes. The other approach is to bring older guns into service by because oddball ammunition is no longer any more expensive than .308. For example, 303British at $21.50/box is a deal compared to 308Win at $30/box.
If you have a surplus Enfield or a Mauser at home, a box of soft points gets it ready for the hunting season at lower cost than feeding an AR10. Even 6.5 Swedish suddenly looks relatively affordable, at the cost similar to 223Rem ball.