HI I AM A NEW MEMBER, I OWN 4 AR-15s (1) COLT HB MATCH TARGET 1/7 TWIST (1) 9mm OLYMPIC ARMS RIFLE, AND (2) BUSH MASTER RIFLES (1) 16 INCH A-2 MODEL AND (1) V MATCH 16 INCH FLAT TOP I HAVE NOT SHOT ANY OF MY 5.56mm RIFLES IN A LONG TIME I WENT SHOOTING TODAY AND MY FLAT TOP JAMMED RIGHT MUCH? IT SEEMED TO BE MORE OF A MAG PROBLEM, THE RIFLE CYCLED JUST FINE FROM THE GAS PRESSURE, BUT THE ROUNDS AT TIMES DID NOT GET PICKED BY THE BOLT, OR THE ROUND DID NOT WANT TO GO UP THE FEED AREA OF THE CHAMBER AND GOT DENTED BADLY ALSO I CHECKED SOME OF THE ROUNDS THAT WENT INTOTHE CHAMBER SOME OF THE ROUNDS HAD RIGHT MUCH PUSH BACK OF THE BULLET!! SOME .030-.050 ths THIS MADE ME WONDER WHAT IS WRONG!! ALL THE MAG I OWN ARE NEW I BOUGHT MOST OF THEM OVER THE YEARS, HERE ARE SOME OF THE NAMES ADVENTURE LINE, PERCISION INDUSTRIER ,OK INDUSTRIES, SANCHEZ ENT. AND SOME FACTORY COLT 30 ROUNDS MAGS I PUT IN THE NEW GREEN FOLLOWERS AND EVEN GOT SOME OF THE VERY NEW MAGPUL SELF LEVELING FOLLOWERS STILL THE SAME PROBLEMS FROM THE BUSH MASTERS DOES ANY ONE HAVE ANY IDEAS PLEASE LET ME KNOW THANKS MIKE B..