When I was about 6 years old I got my first EVIL HIGH CAPACITY SEMI-AUTO a Winchester 74 chambered for 22Short only.extremely accurate but even though it killed everything I shot with it I traded it for a Remington 512 bolt repeater capable of short,long,LR.It is a wonderful gun but I have finally determined the the Short is my favorite squirrel round.It seems that the LR goes right through and the squirrel may require a second shot.With the Short there is a soft noise followed by a distant "thump" and it's all over.In the few shots hitting the viscera about 8 inches may seem to have been drawn out,as opposed to a clear thru and thru hole from the LR.
UN fortunately I have not seen any shorts for sale either.