Finally! Just finished up loading my first full box (20) of .535 Postells in .45/70 for the Sharps. It took a bunch of monkey bid'ness and playin' around, but they are all sittin' pretty and they chamber nicely in the Sharps. I did not use a drop tube at this time. I managed to squeeze 60gr of 2F Grafs in under the fiber wad, and used the Montana Precision Swaging compression die to pack it all down good and tight. The MPS Postell bullets are lubed with SPG BP lube. It took quite a while to load 20 into new Starline brass, but I got-r-dun and they are waiting to be launched from the Pedersoli at the earliest convenience!
I'm sure I will develop the typical shortcuts one ends up with, as it was I used my adjustable BP measure to meter out the 60 gr which was quite time consuming. But in the end, I am grinning like a Cheshire cat to know I have 20 rounds of thumpin' BP ammo to feed my Sharps!
As I load more and refine my technique some, I'll try to get some photos and a brief write up going. Stay tuned!!!