Put another 100 rounds through it, and got only 4 FTFs. Nevertheless, it's time to send it back to Beretta. It's really a disappointment - I wouldn't expect this from a $600 gun, especially since one of my main reasons for buying it was all the great reliability reviews that I came across.
Other than FTFs the gun shot great, was pretty accurate, with very manageable recoil (9 mm). Since it's pretty slick it's easy to carry, even though it weighs about 24 oz...
I'll try to give an update once i get the gun repaired.
Have you tried cleaning the mags/gun (get all that packing grease off)? Some people seem to think that packing grease is lube and its not, and Berettas are especially prone to failure when not properly cleaned.
I have several Berettas (including the full size PX4) and I know that not cleaning the NIB gun causes the problems you seem to be experiencing. As for the slide not going all the way fwd, I think you having the decocker/safety on is causing it. Are you 'slingshot' loading the gun, or are you hitting the slide release after inserting a full mag? I've found that if I load a fresh mag into the gun with the slide in battery, then slingshot the slide to chamber a round it doesn't bind up, but if I have the slide out of battery, load a mag THEN hit the slide release, sometimes it does the exact same thing when the decocker/safety is engaged. If the safety is not engaged it never happens.
Also, I noticed it happened more when the gun was brand spanking new, after around 500 rds it never happened again. I also never use the safety except to decock and when range rules require me to do so, and I never load it with the safety engaged.
Another thing to look at is make sure the mag springs are in there correctly, apparently some mag springs have been installed upside down/backwards... Even in factory mags.
As for it not liking all ammo, I'm not surprised. My full size PX4 was finicky, only liked AE ammo at first, but now it'll eat anything, including Blazer Brass and WWB. I don't shoot anything but BB, AE, Fiocchi and WWB for target though, so I'm not sure about any other ammo. SD ammo works 100%, but I don't shoot hundreds of rounds since its not a CCW gun.
If you are still having problems after detail cleaning the gun/mags and making sure the mag springs are installed correctly, send it back to Beretta since its under warranty. Berettas are known as good quality firearms, this isn't acceptable if everything else is 'ok' with the gun, IMO.