Hey fellas, I've been in the process of scoping out my M1A. I've already got me a good rail, and going to get some nice rings. Going to add a check weld on it. Now all I need is the optic itself. Since this is going to be my first real venture into optics I need some suggestions. I would like a optic somewhere around a 3.5-12 or 3.5-9 at the very lest. Something that can take a 7.62x51 round. This is the real important thing to me anyways (and if I'm misguided please correct me) is having bullet drop markings on my sight for the 7.62x51 or .308 with this gun. I have no clue if there is such a thing, and if there is how to search for it. I'm really trying not to go over 600 but I'm flexable.