"prepping" the bore on that rifle is a massive waste of time. I have yet to clean my 6.5 creedmoor barrel in 6-700 rounds and its holding sub moa. If anything copper fouling helps with accuracy.
Next time you go out, dump 3 full mags into the berm. If it cant do that its not reliable enough to trust your life on. Buy a 556 upper, mags, and m193 and be done.
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