Smoak

I will provide a link to the site for a free on-line calculator that can provide your answer.

I can't give you the exact answer because you have left off some of the variables.

http://www.eskimo.com/~jbm/ballistic...raj_basic.html
You don't state the ambient temperature nor geographic altitude (I see you've stated Florida) where you will use this data.

A short lesson in approximation:

A standard set of come-ups that I have used for years with the 308 Win will provide a very close set of data for nearly any proper rifle. Figure the 308 Win data as a base value of 1.0 and figure the magnums and flat shooters at a value between .66 and .75.

Yds Come-up (in MOA)

100 -0-

200 -2-

300 -3-

400 -3.5-

500 -3.5-

600 -4-

700 -4.5-

800 -5-

900 -6-

1000 -7-

These are individual come-ups, you must add this together to get a total come-up in MOA. As an example, 500 yards is 2 + 3 + 3.5 + 3.5 or 12 as a total. You come-up for the 300 will be in the .66 range I'd guess... about 8 MOA of UP over your accurate 100 yard ZERO.

To use these calculation programs correctly, you use a 100 yard zero and record the "drop" at the ranges desired. Once you have the "drop" you back-calculate the elevation requirement. For a .47 BC round at 3300fps and "STP" conditions the drop as stated (displayed by JBM) is stated as 36.8 inches. 36.8 / 5 (500 yards) is 7.36 inches, now convert this to MOA by dividing by 1.047 and you have 7.02 MOA up needed for 500 yards. (My quick rule-of-thumb 8 MOA estimate would have had you 5 inches low on the target, close enough for beginning data. )

[ 03-20-2003: Message edited by: Dave King ]