Out of what’s available at the moment, cci stingers will be the fastest, but you’ll be lucky if they’re accurate in your rifle. The only rifle I’ve known them to be particularly accurate in was a bsa sportsman. Winchester xpediters were fast and accurate for me, but not available now to my knowledge. I find rws high velocity hp’s to be very accurate, also eley high velocity hp. Federal classic and fiocchi high velocity hp’s also I’ve found to be amongst the best, mini mags and velocitors not quite as accurate. It’s a matter of trial and error. See if they suit your rifle.?