These Leupolds have a ranging feature. 1/2 of the site reticle (start of thicker portion of the duplex to the crosshair) = 16". Does anyone have the approximate sizes of back to belly for African critters. The 16" ranging size for Whitetails in the US is a bit small for most of them I bet. However, maybe several come close the doubling this to 32"? Specifically I would like to know the sizes for: Kudu Gemsbok Wildebeast Zebra Impala Eland Giraffe Thanks!