400.00 Cooey 28ga shotgun with Winchester steel barrel model 840 Saint John Apr 2, 2025 - 3:02 PM walther9mm For Sale: Cooey with Winchester steel barrel model 840 28ga shotgun, purchased in 1965. Gun is in Good shape, barrel excellent, blueing shows the age of the gun but in good shape. Comes with 2 boxes of # 4 Shot 28ga and 1 box of #6shot 28ga.