Just wondering how you guys go about judging distances. I'm guessing alot of you have just shot so much that you just know, but i guess kinda what i do sometimes is just have an idea of how far 5 yards is and i try to count how many of those there are between the target and me. I use a range finder while hunting but at the 3d shoot i went to this weekend i didn't and i had a heck of a time judging the distances. Any hints, tips, or suggestions?