You meant for the .22LR caliber Mo-Skeet smoothbore? If you can find the Winchester #12 shot loads with the crimped cases they work every bit as good as CCI's at a big savings.
Cci mini mags, winchester bulk, and remington golden bullets run good in my 2 sigs. Had bad luck with anything federal, but thats the same with my cz, savages, and marlin as well.
CCI MiniMags always run 100% in my Mosquito. Also, Remington Golden Bullets are the best of the bulk stuff in mine - almost never an FTF. The gun runs about 90% on Federal Bulk and Blazer Bulk. For best performance, make sure you keep it squeaky clean.
I have a video on YouTube showing myself shooting 100 rounds in a row, fast shooting, with 36 grain Federal 550 bulk pack ammo. I had 1 failure and that might have been magazine related. You have to use the light spring but I had very good luck with the Federal ammo. I shot thousands of them with very few failures.