Keep in mind that the cycling you have may not be full cycles. That is, the bolt going all the way forward and back.
The lvl7 bolt is not the limiting factor of ROF on a mag. The hole in which the air travels through to the on/off is. IIRC, the max ROF on a classic valve is about 12 before you start to get shootdown. The RT gets around this by increasing the pressure that flows through the on/off.
Have fun testing.