The Leica does allow you to input your ammunition info and provides the holdover info desired.
For $1,000 dollars less the Leica 600 B does 90+% of the G7.
For $5.00 Istelok App you can store all kinds of balistic data for all your Rifle and scope combo's.
Also a Hornady.com had balistic calculator that you can print out the output.
If it was my money I would save $1,00 and go with the Leica 1600B