gotta be incorrect labelled spring or something.... Or Ddddddaaaaammmmmmmnnnn you are good - care to write a tutorial or pass on your elite mofo engineering skills ???
I don't think so, as it was doing 330ish in the previous gearbox. Annoying as the box was doing 360 when I originally got it!
Could be a grease buildup at the front of the chamber. A build up in the front increases FPS, while one in the back decreases it. It all has to do with air seal
I imagine it's a case of mis-labelled spring like Duck said, plus the old box not having as good a seal. Usually with these M90s I get 340-350ish, just surprised me is all!
Or Ddddddaaaaammmmmmmnnnn you are good - care to write a tutorial or pass on your elite mofo engineering skills ???