Nice shotshell head.
It is a bit of a hard one to give a rock solid date on though. I honestly believe that it is "sort of" a carryover line from UMC when Remington and UMC merged in 1911. UMC offered a line of shells called the Shureshot. The Shurshot is only seen with the Rem-UMC headstamp (as far as I know). 1911 is the earliest that it could be, although I believe that it is a later introduction. Even though Remington-UMC was purchased by Dupont in 1934, there is still mention of this line of shells being used in 1956. 1911-1956 is a pretty big date range. I will see if I can narrow it down, but have had problems in the past with this one. I still have questions out for the Remington historian. As soon as they get caught up, I will fire on another email to them.
Doug
Most everything that I can find in the way of ads and brochures are from the 1940's-1950's. Just re-looking through some stuff, I found a 1959 mention of them.