This Hornady Balistics Calculator is just about exactly "on" as far as I can tell from my testing.
http://www.hornady.com/ballistics-resource/ballistics-calculatorI find with a 44mag velocity is a real range extender....shoot the 240gr to 1500+fps and you will easily be able to zero a scoped revolver to 150yards. This will carry you all the way to 200yard+ with just a little holdover. You can shoot dead on to 175 and never go above or below 5" from line of sight.
With some testing and range practice, with the duplex reticle scope, you can utilize the heavy cross hair point as a perfect referance point.
When you raise to the 300gr and have to slow it down, it will really cost you on the downrange side of the ballistic arch.
