Large Rifle vs Pistol Primer Pocket Size


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mkl
June 10, 2008, 12:52 PM
What is the difference in dimensions between large rifle and large pistol primer pockets?

Sinclair offers two separate primer pocket uniformers for the large rifle and large pistol, while there is only one offered for the small rifle/pistol.

This leads me to believe there must be some difference in the depth of the large pockets, while there is none for the small pockets as it is my understanding that the large/small diameters between rifle and pistol are identical.

I've got both the small rifle/pistol and large rifle uniformers. Do I really need the large pistol also, or can I simply use the large rifle that I already have?

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Wil Terry
June 10, 2008, 01:24 PM
........

mkl
June 10, 2008, 01:41 PM
Thanks.

And which one is the deepest? Rifle or Pistol?

mkl
June 10, 2008, 05:20 PM
Oops... I forgot my calipers have a depth gauge also. Never used it.

I get a depth of .1270 for large rifle which have been uniformed, and an average of .1195 for my new 45 Colt cases which have not. Five case average in both. Delta = .0075, so I guess the Colt cases are a little greater than nominal depth.

RidgwayCO
June 10, 2008, 06:45 PM
According to SAAMI, the depths for small pistol, small rifle, and large pistol primer pockets are .118" to .122", while large rifle primer pocket depths are .128" to .132". Small pistol and small rifle primers have the same diameter (.175") while large rifle and large pistol primers are also the same (.210").

Also, Speer recommends primers be seated .003" to .005" below flush.

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