Online ballistic calculator

[Marc]

This is a good one! It lets you input sight height, zero range, and all the other essentials. It will give drop figures for 10 ranges out to whatever you select as a maximum. For example for the 30-30 you can do 20 yard increments to 200 yards. It uses either G1 or G7 B.C.'s. I used the G1 figures as I think G7 is for VLD bullets. Great tool! Go here and click on the ballistics program to run. I did have to update Java to make it work but that is a simple thing using their link.
http://desertsharpshooters.com/content/webpage/id/8

[COSteve]

I prefer this free one on Handloads.com because it will calculate the BC for your bullet type and plug it into the calculator.

[Marc]

That one looks very similar. It has a simpler layout too. Output looks the same.

[El Chivo]

what is G1 and G7?

[Old Savage]

Basic bullet shapes - I think G1 is a flatbase spitzer.

[kasTX]

Better yet, try downloading this program:

http://www.6mmbr.com/ballistics.html