The .25-20 is the parent of the .218 Bee, so thats probably not it, but... there are a LOT of .22 Hornet wildcats
A guy named Anthony Puglese bought the gun from Ruby's brother, who claimed it back from court after the time period for holding the evidence ran out. He paid $250,000 for it. He then sold (or tried to sell) bullets fired from the gun, in a walnut case with certificate and such, for $500 each, to recoup his investment. Tony came in to the range one day, and wanted to take the barrel off the gun - why? Because the gun is an aluminum frame Cobra (or was it the first Agent model... I forget they're real similar). Anyway, the gun was gonna wear out trying to fire enough rounds (5000) to recoup the investment, AND, the gun was falling apart as it was. I personally made some repairs to the gun, but advised him that the barrel would have to stay put because its removal from an aluminum frame would destroy the frame. So we worked up very light loads that sort of "leaked" from the end of the barrel, and Tony fired them into a drum of water. They were then collected, and engraved with serial number, very thinly plated, and mounted, hopefully to sell. One day, he had a squib load, and I had to drive it back down the barrel. Luckily he noticed it was a squib, because it was protruding from the end of the 2-1/2 inch barrel!!! I asked for the bullet as a souvenir and Tony said - yeah sure "kid" (I was about 35 at the time). He was good to us, always came in with freebie coupons for this or that (like dinner for two at Mortons or Charlies Crab).