If 5.56 isn't good enough, buy 75-77gr 5.56.
Yes it costs more, but it's no more expensive than getting some obscure chambering you'll never find ammo for.
It's also proven and used the world over. Plus you can still use any regular 5.56.
I keep hearing of all these short comings and all these comparisons, but they're always comparisons to the most "meh" loading. 77gr is a whole different world from the 55gr. If your rifle can't handle 77gr bullets, then buy something that's in-spec next time.
Yes it costs more, but it's no more expensive than getting some obscure chambering you'll never find ammo for.
It's also proven and used the world over. Plus you can still use any regular 5.56.
I keep hearing of all these short comings and all these comparisons, but they're always comparisons to the most "meh" loading. 77gr is a whole different world from the 55gr. If your rifle can't handle 77gr bullets, then buy something that's in-spec next time.