Thats all you need for a 12 ga. While they may be only good for in between cleanings on smaller calibers where the copper jacket rides on the rifling, you are talking a 12 gauge slug gun shooting sabot slugs. The grooves and lands are so big compared to regular medium or small bore rifles that the same cleaning issues rarely if ever arise. Unless you notice a big drop in accuracy ora buildup of plastic tailings etc I wouldn't even bother withregular cleaningsexcept maybe once a year if at all.With a slug gun your talking maybe 20 rounds a year at most. ( and if your shooting more than that for practice I think you should seriously consider a 22rimfire rifle as the cost of shooting sabot slugs is prohibitive at least for me and slug guns simplyain't fun to shoot) take care.