Great little sixgun! I had one I referred to as my "Baby Blackhawk." Mine had the extra magnum cylinder. I used the magnum cylinder more oftern than not. I shot the .22 WRF (not the .22 WMR) mostly because I had good performance in a cartridge that handled a little better. Sometimes on cold mornings I got a little fumble-fingered and dropped those tiny .22 RF cartridges.
And, I took quite a few squirrels with the .22 WMR. Loaded with the magnum round also made it more effective on crows, too.
Now, alas, I am completely without a .22 RF.