Big Bore options
Which upper is more reliable, a RRA or Bushmaster in a big bore application. I will be hunting feral pigs in tight brush; I would like to have an upper that I can count on when shots can range from 50 yards to 5 yards. I like the use of regular mags for the 458, but factory ammo is costly, where as the 450 BM ammo is cheaper, but must have a mag with a dedicated follower. I am not looking at bashing either company just want the best factory upper for the application.