hello, I have recently purchased a Mossberg 715T 22lr rifle and 3 extra 25 rd magazines. After a good cleaning the rifle cycles flawlessly. My problems began when I tried to rapid fire, each 25 rd mag would hang up or I mean the bolt at least would hand up at about the 11 or 12th round in the mag. It was consistent with each mag. Is this just because they are new or can I take them apart and do something to the spring or what. Any details would be most appreciative. Oh, and I am using CCI blazer 40gr cartridges. Thank you for you time.