Lyman Reloading Handbook 49th


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glenns
August 26, 2011, 10:58 AM
Just bought this:

For the loading data for each bullet type there is notation on the right corner just below a picture of the bullet. What is "BC" and "SD?"

Example: on page 341, 9 mm Luger, 147 gr. TMJ -
BC: .208
SD: .167

Thanks.

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MtnCreek
August 26, 2011, 11:00 AM
http://www.thehighroad.org/showthread.php?t=611056

glenns
August 26, 2011, 11:03 AM
Thanks. I also found this:
http://www.chuckhawks.com/bc.htm

Jim Watson
August 26, 2011, 12:47 PM
sectional density (which is the ratio of a bullet's diameter to its weight)

You gotta watch out for ol' Chuck. Sometimes he gets it right, sometimes he doesn't.
Sectional density is the ratio of a bullet's weight to its diameter squared. Like I said in your other thread.

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