Don't know. I just emailed them. I went to take it out. I rarely get to shoot it so it has been a while. I grabbed it by the barrel and it turned. I thought I was just imagining it. But no, it took no power at all to twist it. I have no clue how they lock the barrel in there but mine is definitely defective or missing it. I'm not very impressed. 50BMG is nothing to screw around with.
I haven't used any reloads and nothing out of the ordinary has happened while shooting it. It just seems like either the design was flawed or someone assembled it on a Friday afternoon.
375 Ruger is the NEW KING of the .375's. ALL HAIL THE NEW KING!