So I have been having some POI issues and slightly erratic FPS issues. So I shot three pellets into a bucket of water and here is the result. Not conclusive till I shoot a couple mags into the water but thought I'd post to get your ideas.
If you look at my bolt probe, there appear to be machining chatter marks. Can't really see them being from the gun cycling.
How many winds is the magazine spring supposed to have on an FX semi auto?
How much play should there be in the bolt probe?