In theory the increase is under 1000psi, but this is only rumor and there is no substitute for testing your own loads. if you found a load that would work with room for the increase, send it to tom armburst and let us know please. I have loads that i use, but none are lab tested.
there is also alleged to be a load printed in last summers (i think) dgj, 16 ga bismuth with universal but I am not a subscriber.
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