Quote:
Originally Posted by kbm6893
Yes. I meant minimum OAL. So i should use the IMR data with the Speer Bullet, but use the lightest charge and work my way up? So how much should I increase the minimum Oal to lessen the pressure?
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The part about using the lightest charge and working up is correct. The part about changing OAL? I've not ever seen a chart, or formula, or any other kind of authoritative guide that gives even a close estimate of how much a change in OAL will change pressure. We know, from experience, that a smaller (shorter) OAL will 'usually' result in higher pressure, and vice versa. But, how much is really fuzzy science.