Quote:
Originally Posted by Jeff Higgins
I use Sweet's 7.62 to take care of the copper fouling in my only rifle that has that problem. The stuff is amazing. Be careful with it, though, and follow the instructions to the letter. It will actually etch the barrel if you are careless with it.
Here's the offending rifle. It's a Ruger #1 with a 28" long 1:12" twist Lilja barrel chambered in .220 Swift, with a Leupold Vari-X III 6.5-20X scope. Handloads with the 60 grain Hornady Ballistic tip and either IMR 4350 or Reloder 22 just touch 3,800 fps.
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I don't recall but I think the Sweet's is ammonia based. I was trying to stay away from solvents with amonia in them simply because of the possibility of actually harming the barrel. The Cu+2 is a non ammonia base product that seemed pretty easy to use. Put it in with a cotton swab with a jag, let sit for three to five minutes, brush with a nylon brush then dry patch until clean.
Nice looking rifle by the way! I was hoping to push around 3800 FPS but couldn't find a load the gun liked well enough. I think the H380 at 40 grains and the IMR 4320 at 36 grains were the two fastest at about 3750 IIRC and neither would group well enough to satisfy me. I wanted dime groups at 100 in hopes that when shooting off the bipod I could hold quarter groups at 200+.