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Primer pocket uniformer??

 
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  #8  
Old 01-01-2009, 04:25 PM
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Re: Primer pocket uniformer??

Quote:
Originally Posted by LewisH View Post
The following are primer pocket depth specifications I copied some time ago from some reliable source...maybe SAAMI:

Small rifle, small pistol, large pistol............0.118 to 0.122
Large rifle............................................. .....0.128 to 0.132

Hope this helps.
Thanks Lewis,
I set up my cutter so it is cutting .130" deep,that is putting my fed215M .004" below the case head.My cutter was definately set too shallow from the factory.
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  #9  
Old 01-01-2009, 05:40 PM
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Re: Primer pocket uniformer??

Have had great success (couple of thousand of cases) using a “Sinclair” one piece non-adjustable uniformer w/ a power adapter. Just need to go slow when cutting and keep the chips cleared.

Remember that brass flows into the primer pocket area upon firing.

A lot of folks think that primer pocket uniforming is only for new cases. It’s a good idea to use a uniformer to cleanup residue and maintain a constant depth from brass flowing into the primer pocket.

Bernie
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  #10  
Old 01-01-2009, 07:14 PM
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Location: Mountians of SW NC, near Asheville
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Re: Primer pocket uniformer??

All the tool can do is insure the pockets are deep enough. The reason the uniformer didn't cut most pockets is that most pockets are already deep enough.
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  #11  
Old 01-01-2009, 08:25 PM
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Re: Primer pocket uniformer??

Actually all of my virgin winchester brass needed more material taken out in order to get the right pocket depth.I have read that a primer should set .005" below the case head.After measuring a few primers,I realised I had to cut the pocket to .130 to get optimum primer seating depth.The winchester brass measured .120" deep,I'm sure it would have worked,but cutting them deeper made them even better.I guess this is where an adjustable cutter comes in handy.
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  #12  
Old 01-01-2009, 09:57 PM
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Re: Primer pocket uniformer??

The “Sinclair” uniformer I use cuts .132 deep ±.000 (SAAMI pocket dimensions are .125 min - .132 max)

I purchased a couple hundred (same lot number) new Norma cases in .338 LM a few years ago. The primer pocket depth varied .003 across the entire lot. Every case had some material removed to keep the depth uniform.

Have never seen any Lapua or Norma cases that where deeper than .132 and only a hand full rem and win cases that where over .132 deep, they did not make the sort.


The bottom line: Primer pockets need to be cut to the same depth ±.000
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  #13  
Old 01-03-2009, 12:56 PM
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Re: Primer pocket uniformer??

"The bottom line: Primer pockets need to be cut to the same depth ±.000"

Interesting standard.

Primers also have manufacturing tolerances and they do vary a few thousanths in both height and diameter. Do you uniform them also and, if so, how do you do it?
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  #14  
Old 01-03-2009, 11:34 PM
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Re: Primer pocket uniformer??

Quote:
Originally Posted by boomtube View Post
Primers also have manufacturing tolerances and they do vary a few thousanths in both height and diameter. Do you uniform them also and, if so, how do you do it?
I use Federal Match Primers, which are standard primers that have been sorted for uniformity in both height and diameter.
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