Has anyone used one of these? I won one on a raffle and am wondering what I'm getting. I'll have to send in my ballistic info and I guess they etch in the drops out to 1000 yards? I'm going to have it set up for my 7mm mag sendero.
They permanently etch the reticle with yardage? what do you do when your environmental conditions change or you hunt at a different elevation or switch do a different bullet weight/load?