I have a brand new Taurus PT 138 PRO .380 I picked up for my fiance last year. This thing has maybe 25 rounds through it. I pulled it out of the safe to check it out and cleared the magazine. While attempting to place the rounds back into the metal 12 round mag, it gets really tight after about 4 or 5 rounds and I can't get any more to go in. It feels like something is binding or the spring won't compress. Is this a normal problem with these? Any thoughts or suggestions? Thanks.