Any Cartridge with the P.O. Ackley connection.
Mostly Ackley Improved, but some are full wildcats of his design.

If you want to know how to correctly headspace for Ackley Improved Cartridges we do offer a booklet that fully explains the subject.  This was written for gunsmithing students so it is complete and easy to understand.  Enter: AckleyGenious  in the coupon code at check out to save $5 on this booklet.

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