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Appearing on cartridge boards of the Winchester Repeating Arms Company in 1888, it may have been nothing more than a display novelty based on a brass 12-gauge shotshell (rather than the paper cases common at the time, or plastic frequently seen today), shortened and necked-down slightly. Only one rifle was ever chambered for it, and it was never offered commercially.
- Barnes, p.118, ".70-150 Winchester"; Foster, Paul, Gun Digest 1952, p.173.
- Barnes, p.118, ".70-150 Winchester".
- Barnes, Frank C., ed. by John T. Amber. ".70-150 Winchester", in Cartridges of the World, pp. 118 & 124. Northfield, IL: DBI Books, 1972. ISBN 0-695-80326-3.