I tried some quite a few years ago . I had big extreme spreads and not so great accuracy . If I remember correctly , I started to get some pressure signs at like 10 or 10.3 grains with 20 grain bullets in my rifle .
I now usually use N-120 . I get great velocities and accuracy with the N-120 . I haven't been able to find any lately though . I still have 2 pounds of it and that will last a long time for me in the 17 AH .