When it came out...The Martini rifle was actually defective. The ejection mechanism was weak. The ammo was paper thin crinkly brass that had a habit of jamming in the breach and the barrel, though reasonable, was not a patch on the Metford that could drop a man at 1000 yards ... Metford himself showed that by using his own weapon in a shooting competition that he won at that very range.
The Martini Henry weapon development can be viewed at~
https://books.google.com.om/books?id...0works&f=false