Cylinder brass

Gos wrote:
A short time later, H227 was discontinued leaving me with having to do another search for a well matched powder. Finding none, I shelved the project for a few years.
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What powders have you tried?

I face a similar problem looking for a powder to fit the "sweet spot" with 22 Spitfire. If IMR-4227 was giving you pressure signs, have you tried something like Accurate Arms 1680 or IMR-4198?
 
Actually, in the beginning, there was the .30-01, but that one was prototype only and never adopted into service. If you're lucky enough to find one for your cartridge collection, you're going to pay a princely sum for it.
 
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