Originally Posted by Tench
Recoil can often be the result of too low a reg pressure so the rifle has to chuck a lot of air down the barrel to make the power, this results in jetting which is felt as recoil.
My current theory is it's not only the volume but the duration of that event. But yes, playing with the brakes, there's a noticable difference on the flow of air that comes back off them with different setups (including but not exclusive to reg pressure).
Really though, unless it's a completely unhandleable beast, recoil should show a vertical spread. Anything else and i'd be looking for loose things or leaking things.