I don't have one yet still doing my research on which one to buy but I do have 600 750 grain A max bullets. 200 rws pieces of brass and ordered my suppressor a month ago. I will have a rifle by February or March.
They are hard to beat for shoulder fired rilfes. Plenty of knock down power, even at long range. I suppose if you have a T-rex problem they are the answer. I spent some quality time behind an M2HB, an AMAC and an McMillan bolt rifle.
A flier will travel a few miles, so they are not rifle range friendly in most places. Most GI projectiles are steel core and prone to start fires in the areas I like to shoot.
I don't have one but I'd like a Barrett and may get one someday. I'm in the going to buy 1 eventually crowd. You might want to set a poll up like Len does, with a couple of answers. I'd love to see the results.