A 147 at 2780 drifts a little over 1” per MPH of wind at 500 yards (22” in a 20mph with the atmospherics here on the Milford).

That means to shoot even a 1/2 MOA group in the conditions you stated... you’d have to judge the wind within +/- 1 MPH (5% margin for error)...and have the wind be exactly the same on both shots... and the hold would have to be identical (with 6x glass). The statistical probability of all those things aligning... particularly “too many times to count” are astronomical, at best.

Even if it did happen that one time at long range camp.... what we have here is a good old fashion case of luck being represented as skill... happens all the time. The only one here that doesn’t know that... is you.

You better pray to the God of Skinny Punks that this wind doesn't pick up......