The targets are not standard NRA Silhouette targets, in fact the NMLRA has indicated in their literature that a 45cal with 60gr of powder should tip them.
Keb, I am very familiar with loads for 1000yd shooting in both Rigby's and Whitworth's; however, this is roundball shooting.
I am more interested in how to compensate for the various ranges to be shot, 50, 100, 150, 175 and 200 yards. (Vary sight picture, vary rear sights (seen this), vary loads or a combination.
Thanks to all for load data, it gives me starting points.