Thread: ? Head Space

@Tedz50, have you messed around with AI cases before? Because you're supposed to have a crush fit when fireforming. Otherwise you run the risk of case head separations, because the shoulder is unsupported.

Googled it... https://ackleyimproved.com/headspace...ed-cartridges/

So the proper headspace gages for a rimless Ackley Improved chamber are a “go” gauge made for the specific Ackley caliber, and a “go” gauge from the factory caliber becomes the “no-go”. This works because the Ackley gauge is .004” shorter than the standard “go” gauge for the given caliber. Because such a small portion of the shoulder will actually be in contact with the shorter chamber the resistance one might expect is almost nonexistent.

Originally Posted by Pommy

@Tedz50, have you messed around with AI cases before? Because you're supposed to have a crush fit when fireforming. Otherwise you run the risk of case head separations, because the shoulder is unsupported.

Googled it... https://ackleyimproved.com/headspace...ed-cartridges/

@Pommy No have never fired an AI cartridge but am always interested in Questions such as these hence my question and suggestion that the gunsmith who did the job would know.I too would delve deeper if it was my gun @flock have some 708 cases if you want them.