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Old February 14, 2019, 09:22 PM   #1
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WIN pistol brass & burrs

One thing about WIN head stamp range brass - ya gotta check for primer hole burrs - In my experience about 1 in 200 have a large brass burr at the primer hole that makes for a less than clean powder burn. This one had 2.

I use the Lyman primer hole de-burr hand tool when I come across these.

This particular attachment is of a 3 hr SS wet tumbled piece of .40 S&W WIN brass, but I have seen it in 9mm WIN head stamps too. ( this is for those who will insist that a good solid tumble will remove all burrs - nope )

One thing I like about the Lyman de-burr tool is it's adjustable for pistol case depth.

Full on Winchester pistol head stamps don't seem to have this flaw.

I used not to bother in my early days when I still dry tumbled with corn cob husk - but found that sometimes these burrs would result in a full flake of GSR trapped behind the burr. If that GSR flake or a trapped piece of corn cob media dislodged and covered the primer hole - however unlikely - this could result in a miss-fire or hang fire.
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Grey_Lion is offline  
Old February 15, 2019, 04:51 PM   #2
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That looks like someone stabbed it with a bent primer punch pin.
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Old February 15, 2019, 06:05 PM   #3
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That's nothing. I bought 500 bulk Winchester .223 cases one time and got two in the box that had no flashhole at all! Talk about a dud wannabe!
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Old February 15, 2019, 11:08 PM   #4
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I blame this insane need for the automation of everything to reduce headcount....... QR by batch sample has gaps, but then it does make things more affordable...... mass production has it's up sides and it's down sides......

Unclenick - those cases probably came off the line on a monday or a friday..... ;-)
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