I picked up a Cooey Mod 84 20ga today at a local dealer for a steal of $100. The firearm isn't marked saying what size of shell it takes. either way, i picked up a box there and just asked for the cheapest #2 shot and he rang it up. once i got home i looked at the ammo, and its 3" mag (which i tried putting in the chamber and fits) but its a High brass Steel shot, will this effect the firearm? or should i have kept to lead shot?
Cooey Mod 84 20ga. Question.
- Thread starter East
- Start date
If the barrel is not stamped with"3 inch chamber" or simply "3 inch" then it will be a 2 3/4 inch chamber. Do not fire a 3 inch shell in a 2 3/4 in chamber. Yes it will go in. But when you fire it the chamber is not long enough for the crimp to open up in the chamber. The material from the crimp will be caught in the forcing cone and when the wad and shot charge moves forward it will tear the end of the case off. This greatly increases chamber pressure and could be dangerous.
Agreed that the old 84 is not good for steel through full choke. I'm not certain about the 20 gauges but many of the model 84 .410s have a 3" chamber and are not marked as such. To check your chamber take a dowl the diameter of a shell or level one up using tape at the end. Insert it in the chamber and mark it where it begins to feel snug. Compare that length to a 3" shell and make sure there is room for the shell + the crimp once opened.
What he said.
