I personally prefer Zerone BB's as many of my mates use them and experience no problems with them and they feed flawlessy. I personally prefer Blaster BB's as a 3000 bottle of BB's cost £9 but which is a little expensive but willl work no problem and assures you nothing can be damged by your ammunition. Back to the subject at hand Zerone BB's are the ones I would definately reccomend for the price.