You're talking about airsoft BB's, right?  I've seen them in the 6.0 mm/0.12 g designations at Gander Mountain.  Never saw any USC units, even in parentheses.  However, once I walked over to the shotgun shells, the reality set in, as everything was in inches and (!!) grains.  Some manufacturers did list the shell lengths in milimeters, but that was a rarity.  There is an industry that we can pester about including metric information on their products.

Remek

On 11/17/05, James R. Frysinger <[EMAIL PROTECTED]> wrote:
Found on the label of a container of BBs in Walmart a couple of days ago...

(In English)    "... caliber 4.5 mm""
(in French)     "... calibre ,177""

The latter refers to the old caliber designation (long ago dumped by NATO in
favor of SI) in terms of decimal fractions of an inch, that is, 0.177 inches
(= 4.4958 mm). Even so, that old nomeclature was somewhat a "trade size".

I don't recall the brand. These were the "old style" copper BBs and not the
new style plastic BBs which come in 4.5 mm and 6.0 mm sizes.

Jim

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James R. Frysinger
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