When I am swinging my coil My audio goes a little funky. The best way I can describe it is... It sounds kinda like you are using an analog dial to tune in an old time radio. It breaks up, then goes soft, then out. I pull the trigger and it goes away. this seems to happen more around bad targets and iron. It will also do something similar when I pin point. It is very annoying. BTW it is not "unstable operation" otherwise my vision is running smooth as silk. Any thoughts? D