I had the pleasure of shooting the Barret M-82(semi-auto version) years ago. It took days to wipe the smile off my face.
Always wanted to get me one of those but I got to wondering where the hell would I ever be able to shoot it. In my mind, if you can't take it out and stretch it's legs to at least 1000 yards you're just insulting it.
So, I opt for the little 223/556. Figuring a little something is better than a lot of nothing.
We gotta do what we can do.