The advantage of a marker like the Autococker when shooting is that if you are taking slow aimed shots, there is less kick from moving parts to throw your aim off by shaking the marker, because the bolt is at rest and only the hammer is moving, note that although this is not actually recoil (it occurs after the firing cycle) it is usually referred to as such. This is a moot point when rapid firing. Paint-to-barrel match and velocity consistency is far more important than recoil. No gun 'lobs' or shoots flatter, except the Z-Body Automag and Flatline M98's & Flatline Cockers, which induce backspin on the ball in order to add lift, and change the trajectory. Paintball are not deformed by the firing forces.
Efficiency: Fixed volume guns are less efficient than pin-valve guns, and blowbacks are less efficient than non-blowbacks.
With fixed volume guns, efficiency tends to go up as pressure does, while pin-valve guns tend to the opposite. This is the reason that LP Cockers are so efficient and Matrixes and Shockers have horrific efficiency.
2k2 VF Cocker, STO/Eclipse Blade, Old-Style 14" Boomstick,
68AutoMag Classic Feed CF11023, Ring trigger.