I worked for Remington in the shotshell business. All the following 2-3/4" Remington hulls are the same internally; only difference is the coating on the steel heads. The STS and Nitro27 hulls have brass heads.
Nitro27 and Nitro Sporting Clays (gold, smooth body)
STS (dark green, smooth body)
Gun Club (light green, light blue, ribbed body, steel head)
Game Loads (black, ribbed body, steel head)
Sport Loads (black, ribbed body, steel head)
ShurShot (green, ribbed body, steel head)
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