Well to clarify some things. I dont personally hold 23 records, those are customers, and records dont mean anything in this discussion anyhow. I am capable of separating the competition stuff from hunting stuff. I work with hunting rifles at distance more than competition rifles by a long shot. In fact this post would not apply if we were using br rifles to hunt with, they still shoot more than good enough even out of tune to kill cleanly. The magnums that wear the throats so fast and the sporter contour barrels that have a much higher amplitude can shoot pretty big at distance if they go out of tune. 1.5 moa would be a disaster if your talking about a clean kill at 1200 yards. Heavy barrels still go out of tune but because the amplitude of their harmonics are smaller, they dont shoot as poorly out of tune. My last 28 nosler's throat moved .017" in 100 rounds, it needed the throat chased and .3gn more powder to get back in tune from barrel wear alone, not including weather changes. Like I said earlier, most of this stuff just doesnt matter at mid range, but past 800 or so it really starts to show up. Most well built rifles will shoot Bergers into 5" or better at 1k if they are tuned, nothing crazy either, no sorting or fussing. Add in all the other variables and mistakes we make, and its still not easy to cold bore at 1k and beyond. Many forget the other variables and mistakes, An moa rifle at these distances requires every thing else to happen perfectly.