Does anyone know how many rounds it takes to brake in the LC9?? Took it to the range, right out of box, and about every 4th round the cartridge was getting stuck in the chamber. (not a double feed) just getting stuck. I went through 100rd box of just standard 115g white box. Range officers was stunned and said to put at least another 200 rounds in to break it in more. I would never think a Ruger would need this much breaking in. Has this happened to anyone?