Some info on Bullberry barrels in general: I just ordered a pair of 10" contender barrels from Bullberry, in 25-20 and 218 Bee. In phone conversation with them, I was advised to use only new brass in loading for a Bullberry barrel. Cases fired in lever actions, for example, were likely to be too large at the base for the sizer to return to a good fit in the tight Bullberry chambers. It'll be some time before I see these barrels.