Buckstix,
Good to hear that you got the old girl singing again...might be just a bit off key at present but that's all!
With the bullets crossing that means that you have to increase speed to correct this & with the 500BPE didn't they normally use lighter 340gn pills?

So with a heavier bullet it obviously will be slower for a given load; but then running 'light Nitro' loads, how do you then determine what would be the equivalent of a full BP load without overdoing it?
93x64mm