[308 at my gate]

I use the same method as you Cycloneman. I have a Leupold 6x20 50mm objective on my 308. The reticle is 3/8 mil dots from premier reticle. I take a paper target at 100 yards and draw a 10 inch line on it and measure it with the reticle. Then at 500 yards of course you just multiply by 5. I chronograph my loads look up the ballistics for that bullet in my book for the drop at the velocity I chronographed and then hold over with the correct mil dot. The first time I did this calculation and shot my 308 with a cold barrel I hit the steel ram at 500 yards. It blew me away.