I wonder if Finn Aagard simply figured out that if you put the same bullet style, say a Nosler Partition, with similar sectional density, from anything from a 6.5x55 to a 30-06, in the same place, at the same range, on the same game animal, you get the same result? Make the cartridge even more similar, as 308 vs 30-06 and there is mostly not enough difference to tell about.
