The point is that there's no proof either way, Craig. Miller has "suspicions". His explanation is plausible--but it's at best an educated guess. And it's a known fact, from previous posts, that he does not think much of Gough Thomas, so he's going to have "suspicions" in just about every case where the evidence is not clear. So there's some bias at work. But we also have to remember that Thomas was an engineer, and it seems unlikely he would have discounted the fact that the faster-burning powder charge was only half as heavy (in terms of bulk) as the slower-burning charge. Just another way of looking at it.
But the whole concept of "felt recoil" is pretty tricky. Some people discount it entirely. Assuming the same gun and same shooter, they'll contend that one shouldn't notice any difference from one load to the next unless there's a difference that can be measured, principally either velocity or shot charge weight.
