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Jimro · November 19, 2012, 10:05 PM

I went to Harbor Freight and bought a 1" micrometer, the Fed GMM primers mic'd to spec. 0.2111.

I then pounded some scrap lead (recovered 22 rimfire bullet) into the primer pocket of a bag fresh 6.5x55 Swede casing, and it mic'd slightly larger, 0.2150. I may have enlarged that number a tad by pushing the lead back out of the primer pocket with a universal depriming die.

I then took the primer I measured and used the Lee hand seating tool to seat it, and it went in with what I would call "normal" resistance. About the same as a CCI 200 or BR2.

Unfortunately I had already primed all 50 of the new 308 Brass (which is why I had to open the bag of 6.5)

So I guess if you encounter Winchester brass with tight primer pockets it might not just be me.

Jimro

November 19, 2012, 10:05 PM	#5
Jimro Senior Member Join Date: October 18, 2006 Posts: 7,097	I went to Harbor Freight and bought a 1" micrometer, the Fed GMM primers mic'd to spec. 0.2111. I then pounded some scrap lead (recovered 22 rimfire bullet) into the primer pocket of a bag fresh 6.5x55 Swede casing, and it mic'd slightly larger, 0.2150. I may have enlarged that number a tad by pushing the lead back out of the primer pocket with a universal depriming die. I then took the primer I measured and used the Lee hand seating tool to seat it, and it went in with what I would call "normal" resistance. About the same as a CCI 200 or BR2. Unfortunately I had already primed all 50 of the new 308 Brass (which is why I had to open the bag of 6.5) So I guess if you encounter Winchester brass with tight primer pockets it might not just be me. Jimro __________________ Machine guns are awesome until you have to carry one.