OK, did my ammo test today at the zero range at Cowtown. I forgot to bring my sinclair competition shooting rest, so shot off a bench with a Harris bipod and a rear bag. These are all 10 shot groups, all 40g bullets except the Federal Bulk at 36g. Ammo;
Lapua Center-X (this is the lot I bought direct after the testing) (C-X)
Wolf Extra (made by Eley) (WE)
Federal Gold Medal Match (GMM)
CCI Green Tag (GT)
SK Plus (SK+)
CCI Standard Vel (CCI STD)
Federal Auto Match (AM)
Federal Bulk (FB)
Agulia Super Extra
C-X, WE, GMM, GT, CCI STD are all standard velocity and I used 1.6 mils and a 50yd zero.
SK+, AM, FB, and Agulia were all super sonic and used the bullseye below the impacts as the point-of-aim.
Takeaways? The C-X as expected performed the best, followed by the WE, and then the GT with the CCI STD putting in a good showing with one called flyer. The SK was awful as was the cheap Federal Bulk. The Auto Match was doing great but had one shot about 1/2" high. The Gold Medal Match was a big disappointment, but I might be able tune a better group with the Harrell.
There was a guy there with a 20" FN Patrol shooting Lake City 175g .308 match ammo and his groups were 3-4x the size of mine. He was not pleased.
Edit; The group under the SK Plus was the Aguila