Frank, I’ve been tracking this thread and quite frankly it challenges my humble scientific brain. You shoot lights out (not at all surprising), out at what looks like Ft Morgan (I’ve taken your class there) in wind and environmental conditions I have experienced there, with 3 completely different rounds, all other parameters and dope equal, and you have the same result at 600yds with all three rounds - no other independent variables In science speak! This racks my brain!
So, what does this mean? We spend dozens of attempts to just tweak a load - just one load trying different bullets, powder, primers, cases, and charges just to get one that works best for a given rifle.
What you just demonstrated (in my humble brain) was that it’s not BC, or SD, or velocity, or powder, or bullet weight, primers(?), all cartridge parameters except case varied in your shoot and all three different cartridges performed - I’ll call it equally. How does that happen? And it’s obviously not distance from the lands, COAL, or chamber fit as those differed between cartridges too!
What does this mean? Does this mean that we should all be focused way more on Mike R’s detailed tolerances, harmonics, etc instead of cartridge/load development? Are we to learn now that build tolerances and attention to minute build details are the answer? Help me understand the implications.
My scientific logical brain has more hypotheses/questions in it now than I can answer. Short story, to me this is some very interesting data that needs way more vetting or explaining by the likes of the ballistics geniuses on the hide.
No doubt Mike R has the recipe for amazing precision and accuracy, and given this thread he is going to be even more busy than he was. Amazing rifle Mike, and terrific shooting Frank. We need more threads like this!