As for medium-priced match ammo, it goes like this: 1. SK Rifle Match 2. Eley Club 3. RWS. (RWS was a distant third).
I've tried two expensive kinds of match ammo, and the results were: 1. Eley Tenex 2. Federal Gold Medal Ultra-Match.
Both of those did slightly better than SK Rifle Match.
As for regular price standard velocity ammo, I have tried CCI and Aguila, and the results have been ho-hum.
Using high velocity ammo, it's hard to tell, because each brand shoots about four inches off in different directions from where my scope is zeroed for 1080 fps ammo. If I really wanted to test accuracy of HV varieties, I'd have to change my scope, and I'm not in a hurry to do that.
Bottom line? For my rifle, SK Rifle Match seems to be the sweet spot. It provides a lot of accuracy for the price. If I were shooting in a match? Eley Tenex is just enough better than the SK that it would be worth the additional cost.
Meanwhile... a brick of Thunderduds is waiting for me at Cabela's... let's see how they shoot.
