Overall 308 will vastly out penetrate m855 just cause it's got a lot more mass behind it and a thicker jacket.  There are some exceptions.  M855 will penetrate a slightly thicker steel plate.  Though a 308 AP round would go through the same like butter.

You give up stopping power for penetration by using m855 over JHP or JSP.

For peacetime purposes, a 20 round magazine is okay with aimed fire.  Capacity isn't as important as with pistols since a rifle is more accurate and require less hits to stop an attacker.  Unless the cartel is after you.

Same/similar for me.  For SHTF or even all-around use, commercial ammo availability for 5.56 and 7.62x39 are quite common for "2 legged" considerations.  For .308 and 6.5 I mostly have match ammo and heads.  I have some hunting ammo for them, but damn expensive.  Now thinking about things a but more, my AK is seeming quite attractive for all-around use, at least where I live.

so dumb. What's so hard about using correct terminology? Just like some people using concrete and cement terms as if they were the same thing.

their not the same thing?

their not the same thing?

their not the same thing?

Nope. . . not the same . . . just like their, there and they're are not the same.

Clips

no one would ever misspell it on purpose...

nice try

Bullet heads is correct