I bought 500 rounds of Federal American Eagle 124grain ammo to shoot with my brand new Gen 3 G17. I am continually getting spent casings thrown back into my forhead. I have never had this problem before with any Glock that I have shot and when I switched to some RWS 124 grain that my dad had I didn't have the problem anymore, but that was only about 18 rounds. Is this a common issue or is there anything I can do about it? I am pretty sure it's the ammo, but could there be a problem with my ejector? I still have about 250 rounds left and I am tired of getting smacked in the face. Thanks.