While I was at the range sighting in. I noticed that when I loaded my Colt 20 rd mags, that the tip of the bullet would be butting up against the mag. wall unless I pushed down on the rear of each round while loading. It became more critical as you neared Mag. capacity. Unless I adjusted the shells while loading, the first rd. would not feed. Is this normal, or is there a tip, I am not aware of?