This morning I decided that I was going to shoot my 250z as my 'daily' target/bench rifle for the Winter. The rifle is tuned for AEA 21.9gr but I thought maybe I would re-tune it for AEA 18.3s to save money on ammo for target shooting.
Before I changed anything on the 250z I thought I would shoot the AEA 18.3s on the current tune (AEA 21.9) just out of curiosity. Since my 21.9gr is 940fps I knew the 18.3s would be 'cookin'! I didn't expect very good accuracy from the 18.3s on the 21.9s tune but wow..., was I in for a surprise! 990fps average and the 18.3s were 'stackin'!
I am shocked that the 18.3s can group at 990fps! The first couple test groups were so good I decided to shoot the target below to share here on the board.
After re-zeroing my optic I fired the 20-shot group below. All shots required me to make slight hold adjustments based on what my wind flags/vane showed me. The one impact out of the group was caused from a 180-degree wind shift that I missed after putting my head down behind the scope. No B.S. that's why that one shot fell off target.
I think I'll shoot AEA 18.3s for my Winter bench shooting and I won't even have to change the rifle from my AEA 21.9 tune!

Though..., I am wondering if reducing the velocity some might improve the overall accuracy???