Thanks for your reply and info!Over the years I have seen a pattern with the amplitude of offsets depending on the scale of the cartridge. Most of my short action barrels (6.5x47L, .308WIN, 6mm Creed) are +/- 0.5 of zero, while all of my magnums (.300NM, 338LM and wildcats are +/- 1.5 of zero. This is true of my old Gen 1 as well as the new M2. But thankfully all of these offsets are consistent and repeatable.
I have thought about charting the barrel POI shifts in the past, never got around to it. Now that I have settled on three cartridges and have worked up loads for two of them I figured it's time.