also, id suggest a different target....
some guys can shoot alright on a big target like that...
personally, i cant...
"aim small miss small"
my targets always have something about as small as i can possibly see to aim at...
iron sights thats gunna be larger..but an orange sticker bullseye or something on that target aughta do the trick...
with a scope i use white computer paper and take a marker and make a dot about 1/4" or a hair bigger in diameter..i can bareeeeely make it out...but, i shoot better when shooting in than anything else..
good luck!
like was said, 50-100 your within an inch give or take...if your MAX range is 100yds it does no good to be high at 100yds...check 25-50-75 and 100yds...zero it for where you are most likely to shoot in your woods...and know where it hits at different ranges...nice thing about close range huntin is theres nothing to remember as its within an inch or so...