The pressure is due to some barrel factor other than length. Max pressure is obtained way before 30 inch.
says your theory. My real life experience shooting the same reloads in three different rifles with barrels from 24 - 30 inches says otherwise. I have seen a pair of 26"ers from the same manufacturer behave differently with the same load in the same action and stock. You ever seen a barrel tighten up at around 500 rounds then start to drop off at 1500 - 2000 ?
Now who should I believe your theory or the data I have gathered and observed in real life experiences at the shooting bench ?
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