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i think it would be a lot easier to dial in a yardage, than trying to count clicks...
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It is all the same. You have to know your gun and the bullet and the load and trajectory. You have to know when to add a couple of clicks and when to subtract a couple. You can read Kirbys account of the whitetail in Idaho and he decided to add a click or two. The part I left out of my write up on shooting the elk with a rifle and load very similar to Kirby's was that I had a light fog/ mist that turned to rain/snow and I added "one click for luck" before shooting. When I stopped in Blackfoot and had lunch with Roy I told him the details. There is what the BDC knob says, what the drop chart says or what the PDA says and then there is what I personally feel is called for.
My point is that I don't really care what is on the scope turret or inside the scope, in the end the shooter has to know his gun, undertand the strenghts and weaknesses of his method and there is a certain amount of gut feeling that goes into a shot.
If you are going to order a BDC makes sure you are very careful in building the drop table. Cold barrel, no wind, no mirage, same brass, same bullet same powder, same cleanliness of barrel. I would expect it would take three sessions at the range to build a drop chart good enough to make a BDC knob suitable for a cold barrel long range shot - at least that is what it took me when I did it.
I would recommend that if you go the BDC route that you also get a standard knob so if you decide to switch methods you can.
