I just fired my Sistema Colt today for the first time.I was shooting Blazer FMJ (100rds) and then tried putting my Federal hydra-shoks thru it.When loaded to 8 rds the 1st round would get stuck when slide was slammed back.This didn't happen though when I had the magazine loaded with 7 rounds.I was using chip mccormick 8rd power mags.I tried this 4 times and everytime the mag was loaded to 8 it would FTF.With 7 it fed fine.This only happened with the HP's not the ball.Does this mean that when carrying HP's , I have to carry only 7 in magazine?