Mule Deer....I would have to ask if you are harvesting 250 to 300 yard deer with an aperture sight were you using a six oclock hold? Would not a 2100 yard six power shot need a six oclock hold also? German reticle? Would not the upper vertical cross hair occlude the object aimed at? Or perhaps you are being........sarcastic?
"Shoot low sheriff, I think he's riding a shetland!" B. Wills
