So I picked up a bersa a couple months ago and finally got a chance to take it to the range this weekend.. While shooting I notced that after firing a round the slide will reach its rearmost position and then very slowly start to chamber the round, then it seems like when it finally gets the next round out of the magazine it slams forward. The gun was properly lubricated any tips on how to fix this? Does it need a stronger recoil spring or what.