I know there are many shooters out there who shoot fullbore. Well if you have an iphone there is a nifty bit of kit (APP) that you can download for free from the Winchester site that will enable you to calculate windage and trajectory of your round without the need of a calculator and a pencil. Just follow the FREE APP's link to download this useful bit of software. It is also available for use on your home PC or laptop. The downside is that it is based on Winchester manufactured ammo.