Originally Posted by angus-5024
When milling try to use the biggest target size possible, so the lenght of the animal. The bigger the target size the more room for error.
The problem is the animal has to be perfectly broadside to you. If not, any angle will change the target size as viewed from your position and throw you off. Range estimation utilizing the mil relation formulas isn't easy. Throw in even more variables such as a target that won't sit still and at angles and you have a recipe for failure.
I practice on "live targets" as well and you will be amazed at how accurate you can be. But then again you can get really good at judging distance using the naked eye.