When I do my daily walk, I listen to the old radio shows from the 1940s/50 on my Iphone. Yesterday I was listening an old Hoppilong Cassidy radio show and he mentioned twice, a Sharps 450 rifle. I never heard of one so, I Googled it and nil results on a Sharps 450 rifle. Is it possible that this was an old fashioned term no longer in use or, the imagination of a script writer? I tend to lean toward the latter but, then what do I know.