There was a 222/12 for sale 35 years ago at a LGS. I was very interested, but the shop owner refused to sell it to me. On that model the top barrel free floated, and there was a slight curve in the 222 barrel.
Since then I have picked up 4 used 24's and got rid of one. The worst was a very early model 24 with the side lever. It was 22Mag/20 with the typical 26" barrels. The 22Mag barrel was grooved for a 22 scope. Scoped with a 4x I couldn't get it under 5" at 50 yards with any of 4 types of ammo. It is the only one I ever got rid of. (Come to think of it, I bought off a BIL just before my SIL got rid of him!)
My absolute favorite is a 24C. The "Camper" is a 20" barreled 22/20 with ammo compartments in the butt trap. I made a case from a thin tool box to hold the gun and every thing a truck gun could need. (Scope, Cleaning kit, Sling, a 100 round box of CCI Mini-Mags, and two 20 round plastic boxes; each containing 5 Slugs, 5 #4 Buck (used to be legal for waterfowl), 5 #4 shot, and 5 #7.5 shot. This whole kit has been my constant companion since around 1986.
I have a 30-30/20 and a 357mag/20 Deluxe. They are both very nice guns and shoot well, but I seldom get them out.
I saw a 410/410 several years ago, and the model was something else, but it was a typical 24 with a thumb selector hammer. The guy that had it for sale must have thought it was a Browning O/U, because that's how he had it priced! (for $200 more I could have had a brand new Browning back then)
So far I have 4 grandsons and 1 granddaughter and 1 or 2 on the way. I can't find one let alone five 24's to give them, but I'm looking hard! Since I load 410, Grandpa will always be a source of ammo!
Ivan