Originally Posted by texan79
Certainly. The fact I was reffering to is that BDC turrets do change based on elevation, ammunition, temp etc. I realize several turrets can be obtained for different variables, but to me, the MOA turrets are much simpler with one purchase, as opposed to having to order and change turret caps based on where I hunt.
I agree that BDC turrets are not a cure all one-stop-shop. My opinion is that they do have their place, and a turret with BDC as well as MOA (or Mil) offer the best of both worlds. However, the numbers don't have to line up to use it as a reference point. I have to do this every time we are on the range with the M24's. Like I stated earlier the BDC turrets are quick and accurate out to mid range (400yards to me). It takes a lot of changes in environmental conditions to make a noticeable change in POI differences at medium distance.
For an example I just punched the numbers into JBM for the average MV of my M110 (since it's scope turrets have both). A 175 gr SMK @ 2530 fps.
I threw in a 50 degree difference in temperature, 80% difference in humidity, and went from 28.00 in HG pressure to 31.5 in HG. The difference in POI is only a couple inches of drop...unless I'm doing something wrong. Ballistic calculators and I don't seem to get along.
I know that in most conditions I can turn the BDC to 4 and hit within inches of POA (not counting wind).
Just another way to skin that darn cat.