I like keeping my number of rifles relatively small and am not interested in getting many more.
Ammo availability has been a major issue lately for me, as it has been for most folks. I was fortunate enough to grab two boxes of ammo for deer season this year, which will last me a long time if I never practice with the thing.
Antero,
Less money to just pick up additional ammo, especially when there's not a crunch on.
Bullet placement will matter more than whether you are shooting a .308 Win or a 6.5 Creed. Best way to get there is with practice. A bolt 22 rifle will help with the fundamentals. Shooting your centerfire will give you familiarity with your rifle/cartridge ballistics, and mean more come crunch time than having two boxes of ammo sitting on the shelf
I pretty much buy No factory ammo, just reload. I enjoy the hobby a lot, and IF you stock up on components you won't even notice the shortages. Not really in-expensive to get into though.
Jerry
