More electra 05 porblems...

[Drummie224]

Ok, so first of all, i am getting two shots with one pull. sometimes having two balls come out, one ball, or none at all. My hopper feeds 17bps, so thats not the problem. I think it could be bounce. the screws are touching the contact points. Also, when ever I fire, on EVERY shot, there is a puff of co2 from the front of the barrel, and from the back of the bolt. Is that unusual? My factory installed bolt has no o' rings on it, but the picture in the manual does. should it have o rings?