I agree with a lot of what was posted above. Try some Wolf Gold in your rifle and see if it is "accurate enough" and if your barrel likes it. Then learn to shoot by practicing multiple disciplines.
If you are like most shooters, and primarily going to play from a bench at 100yds, then there ARE some diamonds in the rough, there you can find sub-MOA capable ammunition for a LOT less than "match grade" stuff.
Some examples in the past:
Walmart - Winchester white box 45gr HP varmint ammo, crazy accurate. Very hard to find these days and overpriced when you do find it.
Remington 50gr HP UMC. I have shot many 1000's of these and they can be quite good. You can still find this, along with American Eagle flavor of the same stuff.
Black Hills 52gr blue box in the past was a great deal, but it is like unicorns these days.
Hornady 55gr and 75gr HP steel match. That stuff was 33-40 cents a round and AWESOME before the hysteria. Hornady got way behind, hoping they catch up and keep making this good practice ammo for a great price.
In 55gr FMJ bulk, Wolf Gold has been showing promise to be very accurate in some barrels, but they could make one simple change and this could go away or vary batch to batch. Never know.
All of this stuff above was less than 50 cents a round.
Right now there is a CRAZY good deal on the 77SMK stuff from CBC very close to 50 cents a round:
http://palmettostatearmory.com/index.php/ammunition/rifle-ammunition/223-5-56/cbc-5-56mm-nato-77gr-otm-hpbt-ammunition-50rds-cbc556c.html
Considering that a 77gr SMK costs 24 cents a bullet on a good day, that ammo is a steal, but I don't have any first had experience how accurate it is.