Speargun Track Question

[SknDvr12]

Ok so i got a Sporasub Instinct Pro and it comes with stock tracks. So i took one off and moved one back about 9 inches from the trigger then i put a plastic track on the front half.

So here is the problem... When i shoot the gun teh stock track moves forward and then it goes under teh plastic track. teh movement of the track does not effect the accuracy of the shot, the gun is still deadly accurate. So i am wondering what might cause the track to move? How can i stop it or if someone has and idea on putting a track on the gun.

Thanks

 

[Trainwreck]

SknDvr12,
Sounds to me like there is something dragging on your shaft. Accuracy aside, does your shaft speed seem slower than before you modified the track? All i can suggest is to really closely check your shaft for burrs or imperfections. Also, check the track as well. Last but not least, ensure the track is properly sized for the shaft.
Hope this helps.