Question: Major Ned H. Roberts (1866 Goffstown, N.H. -- 1948), was an American hunter, competition target shooter, gun writer & editor, ballistician and firearms experimenter, Roberts was a prolific contributor to sporting publications, including which United States-based monthly shooting and firearms interest publication, owned by the National Rifle Association (NRA)? 
Sentence (from "Ned H. Roberts"): His work on cartridge design in collaboration with Adolph Otto Niedner, Franklin Weston Mann, Townsend Whelen, and F.J. Sage led to a commercialized version of his own original .25-caliber wildcat cartridge introduced by Remington in 1934 and named the .257 Roberts.
Relevant evidence: No