Thread: Flash hole size in 45 ACP
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Old 03-26-2017, 04:56 PM
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ghawke ghawke is offline
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Default 9mm
Since this thread on flash hole size is still active I want to add something about 9mm.
Sorting thru some 9 mm brass that was just cleaned I found several that a 0.071 de-priming pin would not go in the flash hole. Found this by eyeballing the hole, then trying the de-priming pin.
Most had a DAG headstamp. Winchester and Speer also were slightly smaller, but the depriming pin still worked.
I guess I would rather find this out by inspecting rather than breaking a depriming pin on my press.

Since I don't know what all the headstamps stand for I found this site. Posting a link:
Headstamp Codes - International Ammunition Association
Last edited by ghawke; 03-26-2017 at 05:03 PM. Reason: add link
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