It sounds like the whole caliber thing is a bit overwhelming to you. So I'll keep it simple. Some people obsess about calibers and ballistics. I'm one of those people. But I also realize you can keep it simple, and get great results.
Medium Game. I assume you mean deer, antelope, etc.? Or smaller, like varmints?
I don't know what the 223 would do for you. Too small for anything much bigger than a coyote.
For deer and smaller, the 243 is very popular. I think anything smaller than 243 is too small for deer. And it might not be legal. I'm not even too crazy about 243 for deer. Some like it because they can do both varmints and deer with it.
For deer-size game, the 308, 270, 30-06, in order of power, are all very common and capable. You'd be splitting hairs to choose one over the other. 270 is more powerful than 308, and has longer range than 308 or 30-06, but slightly smaller bullets. Want more power and range? Go 7mm Rem Mag.
For deer and larger, the 7mm Mag and 300 Win Mag are excellent choices. These are starting to get in the range of high-recoil rounds, though.
For big stuff, like big bears, a 338 Win Mag or 375 H&H would be good choices. I wouldn't go any smaller than 338.
Everyone has their pet rounds they will recommend to you. (I didn't list my pet rounds. Well, maybe one or two, but only because they are also very common.) But the test is: Is this a real common caliber I can find in common rifles? Can I get the ammo just about anywhere?
Personally, I like the idea of one rifle that can do it all. A 338 is a bit big for deer, maybe a bit small for grizzlies. And it's a handful to shoot. Adding big bears into the equation makes your selection difficult.
I recommend bolt guns, too. But a reliable hunting semi-auto could work fine for small-to-midrange. Anything more powerful than 30-06 (which is rare in an auto) and you'd have to go bolt.
FWIW,
David
Medium Game. I assume you mean deer, antelope, etc.? Or smaller, like varmints?
I don't know what the 223 would do for you. Too small for anything much bigger than a coyote.
For deer and smaller, the 243 is very popular. I think anything smaller than 243 is too small for deer. And it might not be legal. I'm not even too crazy about 243 for deer. Some like it because they can do both varmints and deer with it.
For deer-size game, the 308, 270, 30-06, in order of power, are all very common and capable. You'd be splitting hairs to choose one over the other. 270 is more powerful than 308, and has longer range than 308 or 30-06, but slightly smaller bullets. Want more power and range? Go 7mm Rem Mag.
For deer and larger, the 7mm Mag and 300 Win Mag are excellent choices. These are starting to get in the range of high-recoil rounds, though.
For big stuff, like big bears, a 338 Win Mag or 375 H&H would be good choices. I wouldn't go any smaller than 338.
Everyone has their pet rounds they will recommend to you. (I didn't list my pet rounds. Well, maybe one or two, but only because they are also very common.) But the test is: Is this a real common caliber I can find in common rifles? Can I get the ammo just about anywhere?
Personally, I like the idea of one rifle that can do it all. A 338 is a bit big for deer, maybe a bit small for grizzlies. And it's a handful to shoot. Adding big bears into the equation makes your selection difficult.
I recommend bolt guns, too. But a reliable hunting semi-auto could work fine for small-to-midrange. Anything more powerful than 30-06 (which is rare in an auto) and you'd have to go bolt.
FWIW,
David