Originally Posted by spug
The only insert we know of bolts getting stuck in is the reball insert, but it's not limited to a single bolt.
It's still ONLY THE REBALL INSERT.
It really has less to do with it being a freak barrel, and more to do with the inner diameter of the back being just slightly smaller than the tip of the bolt.
I'm sure that it being a freak insert has something to do with it though since there.s almost no chamfer on the inside edge of the insert compared to say a UL back.