My just acquired,new,10 FCP-K has the same issue. I'll let Savage know, but don't consider it too much of a problem. Ordered a 0, MOA EGW HD mount. I'll just measure the discrepancy from front to rear and add the appropriate shim. To the poster who had a problem with malfunctions in the cold? Grease in the FP channel would be my guess. A clean-out and lighter lube may solve that issue. Just a thought.