Mossberg 500AB Pump shotgun.

[.357MagTaurus]

This gun says 3" magnum. What else if any can be used with this shotgun? It has a 24" deer slug barrel.

 

[DocBoCook]

usually 2 3/4 shells also. Buck, Slug and turkey loads will depend on your chock you have.

 

[RandKL]

Is that 24" barrel rifled or smooth, though? The 24" slugster comes in both flavors.

3" means it'll shoot *anything* up to 3". 2 3/4" shot and slugs (all kinds) and buck are all fine. Even old 2 1/2" antique shells will work in it. Shorter shells are always ok....longer shells ie longer than 3" aren't. If your barrel is rifled, you'll just not get great patterning out of anything but sabot slugs. You can shoot anything through it, it just won't hit much beyond close range.

rich

 

[cratti]

Actually, I've seen a few Remingtons marked "3" or 3 1/2" shells ONLY"
But that's beside the point, I guess.

 

[RandKL]

The only reasoning I can see you'd stamp that on a gun is if it's a magnum semi-auto and shorter shells won't guarantee reliable cycling....but there are *no* Remington shotguns, or any other shotgun I can think of for that matter, that is designed for 3" and 3 1/2" shells and somehow becomes dangerous if loaded with a shorter shell. Most Remingtons won't reliably cycle Aguila shorties, either, but they are perfectly safe to fire in *all* Remingtons (and all other shotguns proofed for smokeless powder) if hand loaded.

But, as you said, that's beside the point.

If your shotgun is marked 3", it can chamber and fire *all* factory-loaded shells of that gauge up to that length.

rich