I got an Otis kit for my Henry .17HMR. Trying to force a patch on a rod was just not working well. The Otis system works well and I'm very satisfied with it. The cable is plastic coated and won't harm the bore and is pulled straight out so it has minimal, if any, contact with the bore. An excellent system if you can't remove the barrel and don't want to use a bore guide IMO.
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