American Eagle 5.7x28mm 40gr 500rds $187, $0.37/rd

• "The PS90 is known to not get along with the AE ammo"

• "Don't use AE ammo"

• "users on the other forum have had many jams in their P90 with AE."

• "at the range today with my PS90 mid round count out of 50 rnd magazine (factory), had two AE rounds feed failures."

• "went to the range with my ps-90 and Federal American eagle to try for the first time, [encountered multiple jams]"

• "had about 15 or so FTF's. When collecting the brass from the ground I noticed that one of the rounds had the bullet pushed in all the way down the casing."

• "Had my first experience shooting American Eagle ammo this weekend and can say it will be my last. The first and only box i opened had three jams and six failure to cycle."

• "The noses aren't as pointy as the Fiocci / Hornaday tipped ammo. They WILL hit the feed ramp and bullets WILL get set back."

• "AE ammo made my ps90 jam (ftf) a lot."

It appears that many batches of this ammo aren't glued securely into the casing, which causes bullet setback that happens right after firing during the next round feeding/chambering. When that happens, the gun stops functioning and jams up. This also has happened to me everytime I've shot AE through my PS90 (my own photos):

• http://i.imgur.com/NFKGieT.jpg

• http://i.imgur.com/aeVO5ix.jpg

Definitely seems like a common issue, I myself have gone through about 5-6 boxes and it has happened at least once from every box I fired and have never encountered this problem using FN ammo. I contacted Federal for customer service, but they didn't help me at all. I have heard they work flawlessly in Five-seveN's though. YMMV.