I've used this table too estimate the weight of a deer and have been within a few pounds the majority of the time.... It's based on the principle of estimating the weight of a cow on the hoof and has been tailored too deer.... It'll help you in finding out how much your next deer weighs.....
https://www.portal.state.pa.us/portal/server.pt/document/926461/deer_weight_estimating_chart_pdf
https://www.portal.state.pa.us/portal/server.pt/document/926461/deer_weight_estimating_chart_pdf