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6/24/2016 1:24:54 PM EDT
I'm just looking over my forms again (for an Omega 9K) before I send it in and noticed under 4c my dealer listed "9" for caliber.  Is this acceptable or should I add "mm" to it?  I recall having forms that listed 9mm under 4c, but I don't know that I have any approved with just "9."  I don't even know that it matters but I figured I'd ask before I drop this off at USPS.  

Thanks.
6/24/2016 1:38:37 PM EDT
[#1]
9 should be fine. My 9mm cans say "9mm", and one of my 7.62 cans says "7.62mm" but my 22, 30, 40, 45, and 5.56 do not have anything else. (Actually, one YHM 30 says ".30" and the other says ".30 cal".
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