Instead of a rifle, get a handgun. DUH.

It's a 500 S&W but it fires the round much faster.
I do want to get a rifle that hits harder than 5.56; maaaaaaaybe it has to do with the fact I just watched the first Tremor's movie, again, just a few minutes ago.
But I already have an AR-AK... I would probably get a 6.5 Creedmoor or .. I don't know. When you get to higher, more powerful calibers, you have to deal with a lot more PITA. Like, barrels only lasting so many rounds, rounds are heavy, rifle is heavy, lots of powder, etc. etc. I do want to get something that hits harder... something in between a 6.5 Creedmoor but definitely not as powerful as the .338 Lapua... I'd be ok with the .338 Lapua but I'd prefer something that didn't have a lot of caveats.