| one way is to increase to size of the transfer hole between the valve tube and the barrel. not easily done, usually have to send it out to palmers unless you're handy with either a drill and tap or torch...is it a cartridge-valve type? another method is 'turbo valve'-ing it, which is just boring out the holes in the valve itself, or in the case of a cartridge valve, the transfer hole out the top...i doubt the bolt will affect it much, but the condition of the barrel will (a little) by causing drag if not polished and having a good paint/barrel match... |