Hodgdon 2011 manual data showed they used a 24" long barrel 1/12 twist barrel using Speer bullet and Win primer.
You lose almost 8" of barrel 300fps loss is very possible. I'm surprised you didn't see the difference working up the load over a chronograph?
I'm shooting a 223 with 24" long Kreiger 1/14 twist barrel and Hodgdon has a max load for 50gr bullets 26gr/H-335 @ 3393fps and I'm at 25.5gr/H-335 @3391fps.
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Last edited by old roper; March 13, 2012 at 10:44 AM.