If your looking at the Gray Box Win`s with 550 rounds in a box you might also be interested to know that acouple years back I ran abouy every kind of .22 rimfire through my cronograph and the only ammo that had a better Standard Deviation than the gray box Win`s cost $ 10 a 100. The cheap win`s were better than all the $ 5 abox stuff. Of course just because they have the best SD doesn`t mean they will be the best shooters in your gun, but I`ll bet they will be far from the worst..
I found them to be good squirrel rounds, but not quite as good as the Rem. Sub-sonic in my guns, which have a SD near 40! Go figure.