I say that if it broke into the barrel channel, so what ? It gives you room to adjust; it doesn't show; it is centered (which can be a big deal if it is not). As far as the folks that say you should do it yourself, OK fine, but if the drill wanders you still get the same results, or worse. I don't see it as a problem. A minor aggravation in that it is not perfect, but again, so what. Use a tapered ramrod, go on with the build, and you will be the only one that knows, and with time, that won't matter either.