As stated above you need to test different lots of ammo before you commit to buying
Cases of ammo. I shoot eley red box, black box, Lapua and RWS In no particular order
Depending on what shoots best. Then buy it in bulk if possible. Get ready to pay a lot
More than $5.00 a box. Every gun is different and at the competitive level you will have to be willing to shell out money to find the best for your rifle.