On Thu, 12 Jun 2014 08:37:12 -0400, Poquito Loco
wrote:

You guys must be good. Our longest range target was only 300 yards, for the M14.

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That's my recollection also (circa 1967 at Ft Jackson) but the M14 was
so accurate that I don't think 500 yards would have been that big a
problem