Long time Contender lover here. My first one was back in the 70's. It was the first version where you needed a screwdriver to change from rimfire to centerfire. It is commonly called the " hard to open " model. The 2 frames I have now are the " easy open ".
I really liked my first one until the newer barrels would not function with it. At one time had 25 different barrels for it. The only two I did not care for was the 45/410 and the 22 jet. I sold those almost as fast as I bought them. My favorites I have now are the 221 "furball" and the 22K hornet. Shot the hornet for quite a while but went to the K for better brass life. Both are deadly accurate. Of the bigger bores the 357 Maximum is my favorite. Ohio has a straight-wall cartridge limit on deer hunting. The 44 Mag was a good one too. But I liked the flatter trajectory of the Max especially loading with Remington PSP 150 grains. Combined with WIN 296 powder and WIN SR primers it gives my varmit barrels a run for the money.
In carbine/rifle mode the 222 Remington is a groundhog's worst nightmare.