If it goes bang every time, that's half the battle right there.
I stick to CCI products because all my .22s shoot it well. Now if I need to compete, I would likely do an ammo comparison for the particular gun, and find out what works the best for that application. In my Silhouette Rifle, CCI Mini-Mags were among the best. IIRC Eley black box was fantastic, but geez that stuff is expensive, and it wasn't THAT much better. It doesn't take very long to reach the point of diminishing returns.
Heck, CCI Blazers are plenty accurate in my MK3.