Deep primer pocket

Ok, Norma brass in 300 Winchester mag , CCI 250 (mag) primers.
I was just cleanin' cobwebs from the top of my bookcase and noticed one of the reloading manuals I have there is the Norma Reloading Manual from 2004. It's been a while since I looked at this , so I took it down and began perusing through.
To my surprise, Norma lists Winchester Large Rifle Magnum primers in every load in that manual EXCEPT: 6mm Norma Br, 223 Rem, 222 Rem.
Those use Winchester Small Rifle primers. I went through 'em all. Ta Heck with dustin'!

WLRM primers listed for everything else, magnum or not.
Norma even shows WLRM primers on 6.5 Carcano and 30-30 Winchester.

What are the dimensions of Winchester Large Rifle Magnum Primers ? Those are the hottest primers. They possess the most brisance, ( explosive force) of rifle primers. So it would seem a given that the dimensions would be larger than CCI magnum primers which are low medium brisance primers.

Is Norma sizing the primer pocket of their brass for the larger WLRM primers ? Making the primer pocket deeper to accommodate the larger primers . Then if anyone uses a lesser primer in their brass, the primer pocket is too deep.

So, anybody know the dimensions of Winchester Large Rifle Magnum Primers ?

Its miniscule.
Ok, according to L.Sherm attachment
----- CCI primer Cup Height is 0.118"
---WLRM Primer Cup Height is 0.121"

for a 0.003" difference.

Cup Height shouldn't be a contributor to the problem like I thought.

Thanks L.Sherm.
 
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