Question: What was the calibre of the controversial rifle invented by Sir Charles Henry Augustus Frederick Lockhart Ross?
Sentence (from "Sir Charles Ross, 9th Baronet"): Sir Charles Henry Augustus Frederick Lockhart Ross, 9th Baronet (4 April 1872 – 29 June 1942) was a Scottish inventor and commercial entrepreneur who invented the innovative and often controversial straight-pull actioned Ross rifle.
Relevant evidence: Yes