I was given some shorts. Fun in a revolver though not quite hearing safe. I have a special mag for my 10/22 to shoot them, though they will short-stroke the action. You hold the bolt closed with your off-hand thumb.
.22 Longs are pretty hard to find. Same case length as Long Rifle, .22 Short bullet. The 30gr Aguila super high velocity stuff pretty much takes care of the Long niche unless you have a real antique. .22 Shorts remain with us b/c there are still plenty of working firearms chambered exclusively for it. The .22 Long, not so much.