This may be a normal occurrence as my P2000SK in .40 S&W also throws its brass approximately 3' farther, on average, than my P30LS in the same caliber. This has been the case from the first rounds fired from these pistols to date. Also, neither throws its brass a distance I would characterize as excessive. I don't think it has anything to do with the condition of the recoil spring assembly in your SK.