Quote:
Originally Posted by 260 Rem
I think the early sign of copper fouling is the occasional unexplained flier ... the fliers eventually becoming the norm. I have never personally tracked the effect of progressive fouling but I suspect groups do not fall off dramatically and I think it would take a lot of fouling to move a consistent 1/2 MOA shooter up to 1 MOA ... but at some point, it will happen.
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Great points. In my case, my .223 is a varmint gun..only range time/punching paper is during load tests, or in the spring to check zero. Everything checked out there. After a few outings (5-10 shots per, rarely ever a shot more frequent than 10 minutes apart) I had a few hits that made successful contact, just didn't land exactly where I was aiming. I hit the range, and only then discovered I couldn't get it down around 1/2" reliably.