Formidilosus, why do you consider a mil reticle better than a BDC reticle for downrange zeroing? I mean a BDC reticle is just multiple units of subtension same as any other. Just like to hear others takes on the subject is all really.
Because it being a standard unit of measure means it is easier to use all around. I can play with a zero to make just about any cartridge/bullet combination into a "BDC" of sorts with a mil dot. Plus there are holds for wind. Tweaking a BDC reticle for more then just the way it was designed is.... annoying.
In case people are doubting that you can make a mil based reticle into a BDC here are a couple of examples at SAC-
5.56 duty gun. 77gr SMK at 2,800fps.
Yards - hold in mils
100 - 0
200 - .4 mil (use .5 mil as it's less then an inch of difference)
300 - 1.1 mil (use 1.0 mil)
400 - 2.0 mil
500 - 3.1 mil (use 3 mil as it's less then 2in difference)
550 - 3.7 mil (use 3.5 mil. 4in difference)
600 - 4.4 mil (use 4.5 mil)
As you can see it falls apart a bit after 500 for the 5.56, however, BDC's are really only 500 yard or so tools in my experience.
308win with a 168gr AMAX at 2,720fps. This time to make it track we will zero at 175 yards. It looks like this-
100 - +0.4 mil
200 - .2mil (ignore and use crosshairs)
300 - .9mil (use 1.0 mil)
400 - 1.9mil (use 2.0 mil)
500 - 2.9mil (use 3.0 mil)
600 - 4.1mil (use 4.0 mil)
With this load the max we are off is 2 inches at 600 yards.
300WinMag 178gr AMAX at 3,100fps. There is actually a couple different ways to run this one but I'll use the one I use for hunting. So if we zero at 200 yards it looks like this-
100 - +0.4 mil (use .5 mil)
200 - 0.0 mil
300 - 0.6 mil (use 0.5 mil)
400 - 1.2 mil (use 1.0 mil)
500 - 2.0 mil
600 - 2.8 mil (use 3.0 mil)
700 - 3.8 mil (use 4.0 mil)
800 - 4.9 mil (use 5.0 mil)
900 - 6.1 mil (use 6.0 mil)
So the max it is off is less then 3 inches out to 900 yards.
Any of these you can hold at the whole number or .5 and consistently kill BG animals out to basically the limit of the cartridge/bullet combination.
Simplified my drop charts for the 5.56 load looks like this-
100 - 0.0
200 - 0.5 mil
300 - 1.0 mil
400 - 2.0 mil
500 - 3.0 mil
550 - 3.5 mil
600 - 4.5 mil
For the 308win-
100 - +0.5 mil
175 - 0.0
200 - 0.0
300 - 1.0 mil
400 - 2.0 mil
500 - 3.0 mil
600 - 4.0 mil
When hunting I aim dead on out to 250 or so then use my reticle from there.
300WinMag-
100 - +0.5 mil
200 - 0.0 mil
300 - 0.5 mil
400 - 1.0 mil
500 - 2.0 mil
600 - 3.0 mil
700 - 4.0 mil
800 - 5.0 mil
900 - 6.0 mil
When hunting I aim dead on out to 250 yards or so then use the reticle from there.
It's all just hash marks or dots in a scope, but being a set, standard measurement means that it's easier to map, has windage marks, and we can use it with just about any combination gun cartridge/bullet and not have to worry about it "matching". IOW, moving a scope from a 223 to a 7WSM= no problem.
(Note, I prefer to dial for any shot past 300+/- yards.)