If you still use the stock barrel (.693) from time to time, then a good choice for bore size in the UL in my mind would be a .688 bore size. I currently have a Proto 1 piece barrel as my small paint barrel cause its made of the same material as the UL and only around 32 bucks
And then the Canadiens said, "Lets just ask them nicely to leave. If they don't, well beat em with our hockey sticks."
Austin Saints - #21 - Retired