I recently received my first CVA Mt Rifle, a late model .50, with a Spain marked barrel. The rifle was unfired, excellent condition and has what appears to be very deep cut rifling. It'll make a great rb rifle i'm sure but when cleaning the barrel i noticed a constriction for the first inch or so at the muzzle. Seems like the barrel is choked. As i read lots of online stuff about the model, i saw a few other references to this as well. Were these barrels purposely choked or was this just a manufacturing issue? Does this cause any issues with accuracy? (only fired it once, subsonic velocities with rb's, seemed ok) Thanks in advance for any replies, J.R.