Figured I'd try BioShot after I ran out of Green Devils.
Nope. They do not feed properly in my KA M4 or KA P90. They feed OK in my KWA M4 after the first ten or so are gone (aka, mags need to be underloaded) and they feed ok in my VFC 417.
I sold one of the BioShot bags to a team mate to use in his G&G GF85 GL AK5 and they feed fine in semi, but not reliably in full-auto.
The Green Devils I used previously worked perfectly in all my guns.
But then I heard the same thing about the Green Devils when I ordered them.

"Works for some, doesn't work for others."