I would say that the mosu common brake here would be the baffel style like the one that Darrel Holland make or Shawn Carlock , Nate Dagley(308Nate) Ithink Kirby is making some now. I think thety are more popular here because we are hunters and shoot from the gound alot and these style brakes keep from blasting you with dirt.
But I think the overall most common brake is the Vias , I've seen more of these than any other.
I personaly recomend Nate Dagley's brake , its very effective lookes realy cool and doesen't cost a fortune. I have one on a 260 and the gun barely even flenches on the bench when allowed to free recoil.
Nate installed one on Eddybo's factory Wby MK-V in 300 Wby (about 8lbs)and the recoil reduction on that thig was awsome , PM Eddybo and ask him about.