So quick question.. I use my 15-22 in Steel Challenge competitions. I almost exclusively use Federal Game Shok ammo as my rifle loves it, she shoots cleanly and I get good groupings from it. Out of 2K rounds I have only had one jam from it. Before my last match I cleaned the rifle. I used an oil I normally do not use, Lucas Oil. I normally do not use this oil as I find it sticky. Well I shot the match and it was COLD that day. About half way through the match I started to have jam after jam. I ran a bore snake through the gun, though I did not think that that was it. I helped for a mag or two, then it was back to jamomatic. Lots of FTE or stovepipes. So I figure that it was either the oil attracting gunk to the rails and thickening up because it was cold or the recoil spring is nearing the end of its life. I have put 2-3K round through the gun and I bought it used (I don't think the previous owner shot it a lot). I just got done cleaning it again to remove any of the Lucas Oil and I put the oil on it that I usually do. So hopefully that will fix it. But I was wondering what the life expediency was on the recoil spring. Bare in mind, the rifle has earned the nick name, Ole Reliable on the local Steel Challenge circuit because I never have issues with it.