Figuring Energy of a round

[Lonestar grips.]

very interesting Dave! i'm going to write this down in my reloading manual.

[sdmc530]

that is great to know. I have a chrony and always messing with loads and this is an invaluable formula...now if I only knew how to do math....

[Lane]

Thanks, Dave. As an engineer, I'm always wanting to know the backing info. With that in mind - what does 450400 represent?

Lane

[Dave Waits]

Lane,The constant 450400 takes into account the proper unit conversions and the half mass in order to get the energy balanced correctly.

You can use different constants to figure it in Joules or Ergs. However, Americans prefer Pounds*feet or, more commonly, foot-pounds, for energy.