Fascinating, will be very interested as you locate the brass and begin working up a load for the 20/577.

As a footnote, Roosevelt traveled up the White Nile to Khartoum in March 1910 to end his Africa Safari. He went to the battlefield at Karrari where the British destroyed the forces of the Mahdi's successor. Expect he was showing honor to Wingate, then Governor-General of the Soudan who was among those who contributed to his H&H 500/450.

Regards