The absolute best bore guide, so far, is and has been the Barrel Saver by T.K. Nollan. Price starts a $190. for standard actions (Rem, etc) and over $200. for others. The guide fits the action and chamber, and a fitted guide within the guide aligns the cleaning rod. Top end benchrest shooters and other accuracy specialists swear by them. Problem is, however, that T.K. has announced that he will take no more orders after first of year. Another loss to the shooting world. I'm glad I bought three more sets as spares.