Check out the bullet drop compensator graph I made for my Leupold scope using the target knob. It works great. By sending me the target knob from your scope and the billistisc of the rounds you shoot I can make and install the graph for $20.00 plus $5.00 shipping.
JDY
The graph sticks on and then I use a heavy clear tape to seal aganst dirt and moisture. I have used on my scopes with no problem. Is the graph waterproof NO.
THANKS for asking
JDY