Ok so I am still relatively new to LRH, and obviously have much to learn. I have recently had a semi-custom rifle built, chambered in .260 with a Benchmark barrel, if it matters. I was wondering: 1) Does copper fouling change your point of impact/zero? like if there is some fouling and i use some Bore Tech CU2 and scrub it all off, is it going to change my zero? 2) Does copper fouling increase accuracy/consistency, does it hinder it, or does it help it and then eventually hurt it if there begins to be too much? 3) I know all this can vary from barrel to barrel, and i was wondering if anyone has had any experience with Benchmark's barrels (Carbon Steel Barrels)? Thank you ahead of time for your input.