randyh
I use the spin jag also on my range rod, but that will not prevent the metal rod from rubbing the crown on your muzzle and eventually it will wear the crown unevenly - which will cause you problems. I do not use metal rods for that reason without a sliding bore guide.... For hunting it really is not that big of a deal for the most part but for range work or cleaning it will... For that reason I do not use metal rods... I use a Tipton carbon fiber rod
http://www.battenfeldtechnologies.com/tipton.html