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.
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)
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 ]