First, howdy. I've been been hanging around and reading for a while, but this is my first post.
I've just gotten into the idea of long range shooting. I know I have a long ways to go and a lot left to learn.
OK, so here's my newbie question: Do you guys use some sort of level to ensure that your scope/rifle is level each time you shoot? One thing I have noticed is that I can shoot some good groups, but sometimes at longer ranges, consecutive groups may not be together. It occured to me that level might be the problem. Drawing a vertical line on the target butt to line up the reticle with seems to help significantly.
We have been using levels on our archery sights for a long time to improve the consistency, but I've never seen a rifle set up like this.