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Can I shoot 12GA 3.5 inch shells in a pump shot gun designed for 2.75 & 3 inch shells
I know that they wont cycle through the action but could I load them one at a time into the chamber if I had to? I know they would kick like a mule but would they do any damage to my gun it is a Mossberg model 500 PERSUADER. This is mostly a what if question as I dont plan to fire 3.5 inch shells in my gun just want to know if I could if the zombies were knocking at my door and I had a box of 3.5 lying around.
Alrighty there rambo if you would read the question it is a what if question. I would never load the improper ammunition into my firearm just seeing if someone else had been fool enough to do it and lived to tell. As for those who say it would not fit we are talking about a shotgun shell not a necked rifle cartridge, my shotgun is a cylinder bore or strait tube so it should fit I think. I dont think the issue of overpressure is as mutch of an issue with shotguns as it is with rifles might be wrong please enlighten me if you know better.
Inside any shotgun you have the forcing cone; this is where the barrel narrows from the wider area for the shell to the actual barrel, no matter what choke it is it has a forcing cone. (shell is wider than projectile) Here is a picture where you can see this change in the barrel;
http://www.hobbygunsmith.com/Archives/Jan04/IA99ConePre.JPG
Now some shotgun have a smother transition in the forcing cone, some have this smoothed out even more by a gun smith for better patterns.
Now when a shot gun says 2 ¾ inch only, that forcing cone is farther back than a 3 inch shell barrel, so the 3 inch shell will not fit as it will hit that forcing cone and not go in all the way. So a 3 ½ in shotgun shell will not go in all the way in a shotgun for 3 inch shells.
If some how you managed to fit the 3 ½ in shell inside a 3 inch shell gun because the forcing cone was modified you would have far too much pressure and the barrel could explode.
Check this out;
12 ga suggested max SAAMI
•2 3/4 inch — 11,500 PSI
•3 inch — 11,500 PSI
•3 1/2 inch — 14,500 PSI
You can see that the 3 ½ in shell has 3,000 PSI more than the 3in shell.
Risking loosing part of your face and hands with an extra 3000lbs per square inch is not a smart thing to do.
Here is a picture of a rifle that exploded, you would not want the same to happen to your shot gun I’m sure;
http://img33.photobucket.com/albums/v99/smallestminority/Kaboom1.jpg
Gun manufactures mark the gun for what it shoots, if it could shoot a 3 ½ it would say so. If your car says; “use unleaded gas” would you use rocket fuel?
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