My guess is that mine was an isolated case, a slip up in the QC. Every one else I've talked to with a Pedersoli has had no problems. I've got all the problems corrected except the slow ignition and that may be corrected with the new Green Mountain liner I put in, haven't had a chance to shoot it yet. In a 54 I would recommend the Lyman GPR for PRB only because of the slower twist, the heavier the ball the less it likes a fast twist. Only my opinion, still your choice, you have to live with it and you are the one spending the money. Look them both over real good and figure out which one feels the best to you, then go for it, you only have to please you. Take care, Rick.