I also think it's a great paper, that I wasn't aware of. The two points in it that I can't help but notice are, the data showing lower peak force over a longer duration was plotted by changing to ammunition that generated intentionally different muzzle energy, the three different Win AA's. The other point is that, in the conclusion, the device is intended to quantify felt differences in the gun, where the ammo is a constant.
My original point was nothing more than it may be atypical to be able to match similar total energy of a 12 ga shell and a magnum rifle cartridge, which I attempted to quantify as muzzle energy.
