judging yardage with duplex
What techniques do any of you guys use to judge distance using a scope with a duplex reticle? Using a 6.5-20 scope, I have used a target of known height and moved it to known distances, then upped the power until it filled the crosshairs up to the posts. (This is time consuming, and inconveinient if you don't have easy access to large tracks of land.) This worked great on a couple of prairie dog shoots, figuring dogs at 12" while standing. This got me to thinking (I should know better), what if a coyote or other varmint appeared at an unknown range, how would I judge a critter that didn't fit the 12" mold?
When the shadows began to lengthen, I shouldered my rifle and plunged into the woods.
Theodore Roosevelt, Hunting the Grisly