460 bullshop 50 cal drop chart

[Bob L.]

Does anyone the bc or can help with a drop chart. I apologize for the limited data but wanted a drop chart.
460 grain 50 cal bullshop and do not know the BC or velocity shooting 70 grains of black powder.
It is zeroed at 150 yards and is 14” low at 200 yards.
Drop chart in 25 yard increments out to 400 would be great info but I am missing velocity and BC.
Thank you for any help!

 

[txhunter58]

70 gr volume or weighed?

 

[Bob L.]

Sorry by volume.

 

[txhunter58]

I don’t do those calculations either, but someone here does.