james is right,
semi 1= uncapped
semi 2= is capped at 15 me thinks
ramp1= 15 balls a second ramping after you hit 3 bps, then 3 shots per trigger pull at 1-2 bps, if trigger is not pulled for a second it starts over
ramp 2= same as above but reaching 3bps activates ramping to 15, then as soon as you drop below 3bps cycle starts again
ramp 3=ramping to 15bps once 7 (i think) bps is acheived