Built what?
A rifle has to be capable of discriminating the ammunition. A "fairly accurate* rifle can't .
Once an accurate rifle is in hand, the benefit of the best expensive ammunition is absence of flyers. I prefer Midas plus for benchrest matches shooting the ARA target. Eley Club, Eley Target, Center-X, CCI SV all shoot about the same, and they all come with a surprise (or more) in every box.
Wolf and SK were so disappointing in 2009 and 2010 I stopped shooting it in a match that specified ammunition cost. I had a bad lot of Club that cost me about 25 points in a 500 point match that was won by dropping no more than one point in nice conditions, or two points in tougher conditions.
So it all depends, and I do not care much for lot testing.
I don't believe CCI Green Tag warrants its cost. Wolf Match was terrible and Aguila Match in the blue box was some of the worst trash, and dirtiest trash, I have fired, but they are priced at a premium over the basic ammunition.
Norma Tac 22 is fairly accurate, but it's extremely slow.
Rimfire bullseye shooters probably shoot CCI SV more than anything else, but I've seen any standard velocity ammunition and some low supersonic on the line.