I have a rem .22-250 in a Manners T4A with mini chassis. I have 2 5 rnd AI mags and 1 5 rnd Accurate mag that feed without issue every time. My 10 rnd AI mag will only feed smoothly if I down load it to 7 or 8 rnds max. If I try to load 9 or 10 rnds it will not feed. The tip of the bullet begins to nose down as it clears the bullet below and either flips forward in the magazine or hits the action just below the feed ramp and stops. I have tried cycling the action both slowly and fast with no difference. I am thinking it may be a feed lip issue but I am not sure. Any ideas or suggestions as to what I should look at or what may be causing the problem?