FX Impact, sticky bolt

Just got the Impact back from AOA, everything is hunky dory for about 10 magazines.. Loading on the bench, the bolt suddenly gets stiff, and hard to close. 
Remove the barrel, everything operates slickly. Its exactly like FX intended. Only without the barrel though, so maybe not exactly...
I silicon every possible moving part, including the guide the bolt rides in. I took the gun apart, down to the bolt itself, can't see anything out of alignment. I triple check the barrel block, and it appears aligned. I used Ernest's video, checked the little rod the pulls the hammer back- it's round, straight and correct.
The bolt is difficult to operate with or without out a magazine- the magazine and pellets are entering the chamber correctly. I'm still shooting it, and it's accurate, but it feel like I'm putting pellets into the chamber sideway when I operate the bolt- either opening or closing it.
It's a .30, so it's torquing a little more lead than some calibers, but having received the gun operating smoothly, and having it start binding suddenly makes me curious as to why. I first thought it was the magazine, but again, the magazine doesn't "impact" the operation significantly in this case. It's binding without the mag as well.. 
im open for suggestions!
 
I love it when a plan comes together- you were both correct.
The bolt probe had "ovalized" - I bet it happened when one of the local range guys, after borrowing it at the club, double fed the pellets and then handed it back when it got sticky. I rounded it out a bit and now will contact AOA for new probe. Solved!
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right. what is the half life of such a 'bolt'.
thats the flimsiest thing ever i have seen.

...wondering why Ernest never beefed it up or made a titanium one.

i would upgrade that. for sure.
i suspect, the weak point is the single screw, no matter how robust you make it, it will wobble.
do not negative accuracy me please, this is a suggestion for improvement/enhancement in my opinion thats paper thin thing is just plain wrong. maybe you can ram down a shaft of a drill bit in it to correct the shape for a temporary fix.
 
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