I appreciate your quandary. Replies to your post should be quite revealing. We'll learn tons from this one.
I used two of the more popular computer codes to give it a go (not Exbal) and got zero confidence scattergun results. I see why I'm more comfortable using drops at distances.
OK here goes: (Hope I don't get beatup too badly;))
RSI: Sea level bc = 0.346
At elevation bc = 0.350
PointBlank: Had to set the MV to 3130 to get 3095 @ 10yds.
BC = 0.238
I'm thinking I could 'guess' the bc closer than this result
looking forward to other's results.
Thanks for the opportunity.