If you don't reload - for the best performance buy Black Hills 55 to 70 grain ammo blue or red box and call it quits. If you reload for your twist rate/caliber the 40 to 80 grain bullets are under the the performance curve. Buy a range of Vmax's and load them in 3000 fps plus velocities. Low to mid 20's of powders such as Varget, H4895, AA2230, H335 and 50 or 55 grain bullets will usually bring out the best in your rifle. Don't expect "cheap" (none of it is cheap anymore) ammo such as Wolf, Winchester white box R code, REM UMC to perform consistantly under moa but groups of 1 1/2 - 2 inches should be realized.