All depends on age, diet, species and geographical location.

The colder the climate, the bigger the deer. If you will notice, deer in hot and aired regions like in South Texas are much smaller than those in Canada. Smaller body mass stays cooler in sweltering heat than those larger body masses to stay warm in subzero climates.

http://www.cabelas.com/product/Cabelas-320-lb-Capacity-Big-Buck-Scale/12...

This is a meat scale with estimates of meat weight based on deer weight.

if you do it right you should get around 70 or more pounds. be sure to take the rib meat as well.

After you field dress the deer if you take it to a processor they will weigh it and whatever the weight is you will only get about a third of that. 120lbs = 40lbs. Or a tad less.

deer liver needs marinating! ughh

I just got done processing my Idaho muley and got about 65 pounds of meat off of it.

Carcass weight will be about 60% of live weight if the deer is in prime shape. Finished cuts will give about 40% of live weight.

I'd say your doe weighed a little under 85 pounds or you wasted a lot of meat to just get 30 pounds....