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Location: New Brunswick
Joined: 11/07/2006
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Magnum Shotgun

If you were to have a 12 gage magnum shot gun that takes 3 inch shells, would you be able to put in 3 inch non magnum shells just regular ones also?

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Joined: 12/03/2005
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Magnum Shotgun

YES Thumbs up

WesternHunter's picture
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Joined: 05/05/2006
Posts: 2368
Magnum Shotgun

I can't think of any 3 inch 12 gauge shell that is not a magnum load. If it's chambered for 3" then you have a magnum 12 guge shotgun and it can also shoot standard length shells as well, just no 3.5 inch shells in those guns. Keep in mind that some gas operated semi-auto shotguns are designed to cycle reliably with field or game loads or heavier. They will shoot light target loads, but just may not eject the spent hull reliably.

Two things make a shotgun shell a "magnum load".
1. heavy amount of shot that it contains
2. heavier amount of Dram powder equivelent , MAX or MAG

You can have standard length 2.75 inch 12 gauge shells that if loaded with 1.75 oz of shot and a powder equivelent of MAX then it will be considered a magnum shell.

It used to be that years ago a magnum shell was a heavier than normal amount of shot, 1 3/4 oz moving at standard velocity of 1200 ft/sec to 1300 ft/sec.

Today magnums seem to be standard amounts of shot from 1 1/8 oz to 1 1/4 oz traveling in excess of 1400 ft/sec to 1550 ft/sec. That much has changed.

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Location: Maryland
Joined: 10/11/2006
Posts: 151
Re: Magnum Shotgun
markhall16 wrote:
If you were to have a 12 gage magnum shot gun that takes 3 inch shells, would you be able to put in 3 inch non magnum shells just regular ones also?

I would think so. Thumbs up

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Joined: 01/05/2007
Posts: 169
Magnum Shotgun

with out a dout

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Location: Western ans Northern Canada
Joined: 06/26/2007
Posts: 80
Magnum Shotgun

I am buying a 12guage auto-loader for my son for bear defence as he does some tree planting in northern B.C.(this almost a requirement for the job) This model takes 3" shells.But it will also work with 2 3/4' shells. If loaded with 2 3/4" magnum shells(or standard) the magazine will likely hold one more round than if stuffed with 3'' ammo. Against a charging bear at close range,I believe he is better off with the extra round.
Most tree planters I talk to seem to prefer the idea of alternating rounds in the magazine,slug,buckshot,slug,buckshot,etc.
Use the 3'' magnums if you like to punish your shoulder or are hunting,otherwise I would shoot the cheaper 2 3/4" ammo if just for fun and wasting ammo. Big smile

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Location: Upper Peninsula of Michigan
Joined: 01/13/2007
Posts: 368
Magnum Shotgun

Unless you have an extended magazine, the number of shells the magazine will hold is the same with either 2 2/4 or 3" shells. A magazine that holds four 3" shells generaly will not hold five 2 3/4 " shells because they are 1 3/4 inches longer than four 3" shells. Some guns might but most will not.
On ammo, I would go with 3" 000 buckshot alternating with 2 3/4" heavy slugs.
Be very siure that a semi auto feeds and fires your chosen ammo with out any problems. Personally, I would choose a pump action shotgun. You might look for a marine model, shorter bbl and rust proof.

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Location: Western ans Northern Canada
Joined: 06/26/2007
Posts: 80
Magnum Shotgun

I agree with you "Professor".Not a lot of difference between 2 3/4" and 3" slugs at close range. But the 3'' 00 buck load holds more pellets.
However Mossberg suggests you may squeeze in an extra shell with 2 3/4'. I know in my old Remington model 11 (yes that is correct,basically a Browning circa 1910) I could fit an extra round in the magazine with some cheapo "Canadian" brand ammo.
I like the Marine version shotgun too,but I'm not sure if the larger magazine capacity conforms to Canada's gun laws now.
I am going to purchase the "Combo" Mossberg package model 930.It has the 18.5" defender barrel,plus a 28" waterfowl barrel,so the gun is still usefull for hunting! Big smile

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Location: Upper Peninsula of Michigan
Joined: 01/13/2007
Posts: 368
Magnum Shotgun

trappermike, you are right that some guns, especially older models might let you put an extra 2 3/4" shell in the magazine. While a 3" will hold more 00 buck that 000 buck, I would favor the 000 for better penetration. I had made up a pump Mosberg with a 20" bbl, Mag-na-ported and rifle sights as bear protection, for a remote fishing trip in northern Ontario. Trip never came off and I sold the gun to a bear hunting guide, who uses it when trailing wounded bears.

Don Fischer's picture
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Location: Antelope, Ore
Joined: 03/24/2005
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Magnum Shotgun

Someone tell me why you alternate between slugs and buck shot? If it were me I'd use all slugs.

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Location: Upper Peninsula of Michigan
Joined: 01/13/2007
Posts: 368
Magnum Shotgun

Well Don, in THEORY, the idea is that if you have to take a very hasty shot on a charging bear, the buckshot spread out of a cylinder bore bbl would give you some leeway if your aim is off a little. Personally, I would load only slugs! A charging bear is a big target and even a poor hit will probally slow it down long enough to take better aim with the next shot. I am not real confident that ANY buckshot can reliably reach the vitals on a charging bear. I understand that in Alaska where really big bears with bad attitudes can be a problem, the shotgun of choice for bear protection is a 10 ga double bbl with really big slugs!

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