Theoretical hunter vs real world pragmatic hunting. I recently bought my first hunting rifle, a .308. Some day when I feel up to it I might use it to harvest a deer in my woods. I have been reading about how it's done. I learned about rang finders, declination, iPhone apps that let me enter the type of ammo, altitude, temperature, etc. All this made me wonder why my farmer buddy who does a lot of hunting has never mentioned any of this stuff to me. Today I asked him. He replied all that stuff is okay but in the Pennsylvania woods the deer are moving quickly. There is not time for that stuff. Does this make him an irresponsible hunter?