I put together two Glock 17 mags with the +2 factory extsion. I got that 2nd part that goes inside. And, I got the strong 11 coil springs to replace what was in the magazine before I took it apart. I can only load up 18 rounds - not 19. And, that 18th round is a bear - I have to use that Glock mag loader to push it down enough to get the 18th round in. As these are new springs - will this change with some use - or should I be able to get 19 rounds into them right away?