I am running some numbers and reading more that I want to know.

Of the 3 rounds in your opinion how well does the 20 pract shoot at 500 yards? Can it be as reliable at 500 yards as the other two rounds?

Is a 40 grain 20P is 4000 fps a realistic velocity?

With my current 22-250 I get about 30" of drift at 500y with a 10 mph wind, the 20P is showing a 24" drift with the same conditions.