hey guys just bought a brand new glock 30 non sf model. i have done alot of reading on here about the 30sf problem so i went to 30. i shot about 200 rounds winchester fmj 230gr through it today and noticed 2 problems, the slide hesitates just a fraction of a second to come all the way forward, and sometimes(maybe a mag problem?) when the last round is fired it returns the slide all the way forward, not locking it back, i will check next time to see if that is mag specific. any help would be much appreciated, i do love the gun very accurate just want to know if i need a new recoil spring or what? Thanks!