I've used the Otis system with ALL of my Garands and been very happy. NEVER a bore snake. With the modern cleaning products, need for brushes is all but eliminated if you clean on a regular basis. Yes I will take a chamber brush to mine once a month during competition season. My comp Garand started out guaging .75 at the muzzle and this morning, 4 years of comp later, gauged it after cleaning up from yesterday's match it guaged .75. Probably 2000-3000 rounds since I bought her. She will still clean the SR-1 when I do my part.