Is it normal for centerfeed magazine box moves side to side a bit when loading? This is my 3rd Savage but first centerfeed, have/had stagger feed. It is a 12FV in 223. I like stagger feed much better! Centerfeed feed lips are stiff, hard to push rounds down into mag, the side movement actually helps a bit but I hope it is designed this way, not something broke! Won't feed single round by dropping a round either! Will the feed lips loosen up with use and easier to load?