Magnum chambers

[Thunderbird]

Apologies if this is a daft question but firstly, are all 'magnum' cartridges at least 3", and therefore are all 'magnum' proofed shotguns therefore at least 3" chambered?

 

I have a gun which is stamped 'magnum' and 1200 and I just want to make sure I am OK with 3" loads in it should the need arise.

[scarecrow243]

Hi you get 2 3/4 ie 70mm magnum cartridges 3 inch magnum and 3 1/2 magnum check your gun to see if it has 12/70 or 12/76 etc

[Thunderbird]

Will do. Thanks

[Guest cookoff013]

magnum is a funny word, as the 3" cartridges has the same up to working pressures.

 

its just a word.

[andy198712]

yeah its just a word....

 

you want to know what size the chamber is, and what the barrel is proofed to, pressure wise generally then you can work out the load in grams that the shotgun can take.... unless it tell you on the barrel or instructions, or email the makers

[smig4373]

With shotguns the term "magnum" refers to shells containing more shot and powder than standard shells. A 12-gauge 2 3/4-inch magnum shell, for example, will normally contain 1/4 to 1/2 ounces more shot than a standard shell of the same size and gauge. Magnum shells are often longer than standard shells,But not always... :good:

[ayano3]

Also remember that steel is far different to lead and other non toxic shot. My old AYA no3 Magnum would only take 32g-34g of steel and it was a 76mm 1200 kgs shotgun.

[mr williamson]

Just a reply to last post magnum proof is not the same as steel shot proof. Never fire steel shot through a magnum proof gun unless the gun is proofed for steel also. You wil find this info on your barrels..

regards

[Guest cookoff013]

With shotguns the term "magnum" refers to shells containing more shot and powder than standard shells. A 12-gauge 2 3/4-inch magnum shell, for example, will normally contain 1/4 to 1/2 ounces more shot than a standard shell of the same size and gauge. Magnum shells are often longer than standard shells,But not always... :good:

 

1.5 oz cartridges in 12gauge 2,3/4" are often called "mini mags" so magnum still is just a word.

the larger cartridges do have more shot, but just a different powder.

[Thunderbird]

OK mine's stamped:

 

12 -76 - 2

MAGNUM

 

and 1200 kgs

 

EDIT: As the chokes are about IC (in fact a bit less I think) I've been advised by a gunsmith that platsic-wadded steel shot up to a maximum of 36gm would be OK, probably up to about size 4. In fact that same advice goes for my Remington 1100 which is choked somewhere between skeet and IC.

Edited June 7, 2012 by Thunderbird