Why is it that .22s always come with 10 round mags? Why doesn't anybody make say . . . 30 rounders for the P22? With how cheap the ammo is and how fun it would be you would think that .22s would come with much larger mags. Is there a law against it or something? The only one I know of that has higher than 10 rounders available is the 10/22. What's the deal?