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jdsingleshot 01-12-2014 12:44 AM

antique primer size bewilderment
I have a peck of old 38-40 brass that I am planning to put to use with light loads. All the reloading manuals I have call for large pistol primers, but the primer pockets in these are the size for small pistol/rifle primers.

Just wondering when the manufacturers changed to large pistol primers--jumping to the conclusion this is the reason all the manuals call for that size.

Anybody know this bit of history?


Hawg 01-12-2014 01:36 PM

It was around 1929.

jdsingleshot 01-12-2014 05:15 PM

Thanks Hawg!

jdsingleshot 01-13-2014 01:08 PM

Another question. A few of these cases are Rem-UMC and have the large primer pocket, but all are the "balloon" type. So, when did the drawn/solid base shells make their appearance?


Cutlass327 01-14-2014 07:49 AM

Have any pics? Would like to see the differences in antique stuff vs "modern" stuff..

jdsingleshot 01-14-2014 12:48 PM

The difference is inside. Don't think I could take a shot that would show it. Maybe later today I can section one of the shells that is too corroded or bent up to use. Then the difference would show.

Cutlass327 01-14-2014 07:25 PM

Ah, OK. No need to ruin anything for my amusement..

jdsingleshot 01-18-2014 02:50 AM

Here is a photo of a shell I sectioned. Very corroded, but shows the primer cup arrangement of a "balloon" type shell.


Cutlass327 01-19-2014 03:30 PM

OK, I see now. Thank you!

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