So, back after plenty of time to vote, the votes cast fall in line pretty nicely.  Powder Charges and Bullets are key elements.  Of course, you have to have Jupiter aligned with Mars to be a complete one ragged hole shooter 

  I actually think you have to either pay extremely close attention to everything or else just get plain lucky.  Thanks for voting, Waidmannsheil, Dom.
PS - Roy, thanks for voting for the Case!  You win 
 
Primer    1   -  1.72% 
Different Powders    13  -   22.41% 
Bullet    17  -   29.31% 
Case    1  -   1.72% 
Off the Lands, Ogive Adjustment    8   -  13.79% 
Powder Charge Changes    18   -  31.03%