Need help. I am using Win 231 for 147 grain 9mm lead bullet. The results are not so hot.
Big groups at 25 yards. I am working on the problem. I think I might be crimping them too much. I am using a Lee factory crimp die. I am getting a few keyholes. I have seen that done with a 45 acp with too much crimp.
Can anyone suggest a better powder? I want to load to 900 feet per second.
That is a power factor of 132.3. More than enough for USPSA Production minor.
Thanks