I just picked up a new MP9 full size. Fit and finish are excellent, trigger crisper than my Glock and am prepared to love this weapon. I shoot a lot of semi's usually from a weaver type stance.
I took my brand new MP toy out to the range the other day and found a number of ejected rounds hitting me in the forehead! One hot one even wedging in my shooting glasses against the skin for a painful wince.
I don't seem to have the problem when shooting one handed (the cartridges ejecting safely over my right shoulder). Just when using a two hand grip (I am right handed). I suppose it could be my stance, but I do not experience the problem with any other semi auto that I own, Colts, Glocks amongst others.
I spoke to the range safety officer who carries and MP and he said the MP does eject more straight back and that I should put a couple of hundred rounds thru, see if the spring loosens or explore changing my stance for the MP. However, I am not sure why one stance would work with so many semis and not this one.
Anyone else have any thoughts or experience with this issue? If its a warranty matter I want to take care of it timely. Someone on another thread suggested limp wristing, but I would doubt it, I was shooting bulls with it. So far I love the thing except that I am eating brass and will soon develop an understandable flinch!