JohnKSa.........how true........the bore guides are so cheap, why even take a chance of damaging the crown........I also use mine on the Savage 99 in 308, and my Marlin 44 mag carbine, both of which are lever actions.....before I bought the guides, I tried to be very careful cleaning from the muzzle and even so hit the crown every once in awhile......just good insurance to buy the bore guides and not damage the crowns....revolvers and lever action rifles I use all the time and so the little extra time to put the bore guide on does not faze me..........