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Having some problems

 
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  #1  
Old 07-20-2012, 02:40 PM
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Having some problems

I've recently noticed that my primers are raised a few thousandths. Firm priming pressure does not seat them any deeper. I measured everything (again) and here is what I've got:

A. Pockets that measure about about .120" deep when measured with the back end of my dial caliper.
B. Federal 210M & 215M primers that measure a consistent .1265"

I normally uniform the pockets with a Sinclair carbide pocket uniforming tool which is at a set depth (not adjustable) but this does not seem to help.

What should the depth of large rifle pockets be? And how thick should the primers be?

I've been reloading for over 30 years and never noticed this before, any idea what's going on here?
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Old 07-20-2012, 04:27 PM
Ski Ski is offline
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Re: Having some problems

From the end of the movie 2 Fast 2 Furious, one guy says to the other, " pockets ain't empty bro'".

Probably not your answer, but couldn't resist.
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Old 07-20-2012, 05:53 PM
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Re: Having some problems

Your uniformer is right. We have to measure primer cups with the anvil fully inserted as they will be when fully seated in the pocket.
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Old 07-20-2012, 06:02 PM
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Re: Having some problems

Quote:
Originally Posted by boomtube View Post
Your uniformer is right. We have to measure primer cups with the anvil fully inserted as they will be when fully seated in the pocket.
Well... they obviously exceed the .120" pocket depth but I really don't have an accurate way to measure the protrusion after seating.
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  #5  
Old 07-20-2012, 10:29 PM
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Re: Having some problems

Are you getting a square seat??? I have seen some of the newer Win brass in carticuler have rather shallow pockets, and while I do use a Lyman uniformer, they sometimes need to be seated, spun 180, and seated again to square them. I'm guessing when I cut the pocket down it leaves a rougher surface on the side of the pocket and it likes to catch. I hate priming wssm brass as it always does this.
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Old 07-20-2012, 10:34 PM
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Re: Having some problems

My K&M primer pocket cutter says a larger rifle pocket is cut .131" deep.
Hope this helps...
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Old 07-21-2012, 12:28 AM
dig dig is offline
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Re: Having some problems

As stated if using Winchester brass this is probably the issue. Winchester QC is nonexistent these days. I have had pockets way to shallow and other so thin as to be discarded new. Best of luck.
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