ok guys-n gals, i have used a 20 mm shell casing to punch out the holes in 
the wind-screen to body seal for my Alpine. I don't know how the casings 
ended up in my pocket( main gun on Bradley fighting  vehicle). i knew my time 
in the army was well spent!
 Also 7.62 casings work well for punching holes for various gaskets.Use the 
5.56 to get an even smaller hole.Of course I have no idea how these ended up 
in my pocket,but they sure help!
 It's harder to find these things in my pocket now I am in the Navy res. ,but 
it still happens.
       Kevin Rodgers PTC  Seattle
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