I've tried a lot of brands of .22 ammo and a few have very poor reliability, I can't stand 1 out of 100 rounds that doesn't eject or fire. For matches I like CCI Mini Mags. 100% reliability. Also Federal AutoMatch and CCI Blazer.

In my Ruger Mark III and IV I use the high velocity ammo. It will guarantee that the bolt will eject the cases. I find thes brands to be clean too. Important for when I'm shooting my revolver.