In my youth, most manually operated .22s, rifle or pistol, were cataloged as "short, long, or long rifle." In those days, the thinking was that if you shot so many shorts as to wear the gun out, you would have saved enough money to buy a new one. But that was then and this is now. Shorts and longs are low volume, high price ammunition, of interest only for the occasional gun made for the older rounds. Long rifles are usually less expensive, shoot better, and are available in a wide range of velocities and qualities.
I have shot only long rifles in my 18 for the past 40 years or so; and no great number of shorts before then.