Saint Ackley lists 40gr of 4064 and 40gr of 4320 as max loads for a 180gr projectile (in a factory chambered 30-40) = about 2300fps.
It's worth noting that the AI 30-40 krag was one of the biggest 'improvements' he ever made. An AI 30-40 has a listed max load for a 180gr bullet is 50gr 4064 = 2900fps
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