rem 700,thats where you are wrong,it is the guns fault and TC has admited to me and others that gun design is causeing the problem but they are still not willing to change there breechplug design to fix it. the crud rings(FOULING JUST IN THE FIRST 1-1 1/2 WHERE THE BACK OF THE SABOT SETS)has become worse as the gun manufactors have tightened up there actions,the so called sealed breech. knight has had some problems ,but not near as much. doug,the seller of UBC says TC has been testing UBC and has found that it really helps the problem and may offer it as a option with there ml's next year. doug's company is the same company that applies the weathershield on the new triumph so they are working close with TC.