If H380 were all I had then I would use it in my 22/250, but, I would try it with a mag primer. I especially hate to clean a rifle that had ammunition loaded with a ball powder shot thru it!! I have some that I have to use, sure don't like it though!! IMR4064 seems to work the best with Sierra 55gr SP, my rifle is a Winchester featherweight and my age (70 years old) isn't a good combination at the range! William
Last edited by William T. Watts; March 21, 2013 at 09:26 PM.
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