They say you learn something new every day- I did. Cleaning a rifle from the muzzle end puts the rifling at the muzzle at risk of damage from rubbing the rod against the rifling- especially if rod is tilted to one side in the slightest. Unfortunately, many rifles do not lend themselves easily to cleaning from the breech. Just found a great substitute for the store bought muzzle rod guide. Find a FIRED 12 gauge shotshell. Use a pocketknife to cut the hull, leaving an overall length pf about 1.5 inches. Use a punch to knock the fired primer out. You're done. This will now fit snugly on the muzzle of a heavy barreled 22, with the empty primer pocket neatly centered on the bore. A 22 cal rod fits right thru the #209 primer pocket. Insert rod thru, attach brush or patch holder, slip over muzzle, and clean til your heart is content. Have not checked yet, but a 16 or 20 gauge MAY fit regular sporter barrels.