I'm trying to make a scaled offset target for my .270win bolt gun. I'm not 100% sure of the scale and offset (bullet drop at different distances i'm thinking) for making a 500 meter target at an actual range of 250 meters. I want to be able to practice 500 meter shots without having to worry about all the factors in a long range shot. That is until my skills improve enough to add in more variables. Any help would be greatly appreciated!