I bought a bottle of ar2207 a while ago. I decided I would try and used some up with the 40gr projectiles. Thinking the faster burning powder and light projectiles would go well together?
Anyway the velocity with the AR2207 seemed to be quite erratic. I with beginning to think my scales were out. Getting up to 100fps difference using the Magneto speed and was getting around 2 inch groups. 22gr ar2207 was good for 3500fps. The ADI book max is 24gr. So I can keep working my way up... But I tired ar2206H and straight away my SD (standard deviation) dropped to 17fps (five shot group) and the group tightened up to about an inch.
So my question is should I bother to keep trying with the ar2207 or just switch to ar2206h or try something else. I also have AR2219, benchmark 8208 and AR2208?