From 2 3/4" to 3"?

[This Guy]

I just bought a used 870, and the barrel says for 2 3/4" shells. Can I put a 3" magnum barrel on it, or does the receiver have to be stronger?

[Robb Jensen]

I just bought a used 870, and the barrel says for 2 3/4" shells. Can I put a 3" magnum barrel on it, or does the receiver have to be stronger?

IIRC the ejector in the receiver needed to be changed or modified in some way.

[This Guy]

Thanks, I'll look into that.

[THOLL223]

By accident I figured out that not only can you chamber a 3" shell with a barrel marked for 2 3/4" but you can fire it. Issue becomes when you want to eject the shell. The opening in the receiver is not big enough to fit a fired shell. I had to take the barrel off to get the empty shell out.

You can send old 2 3/4" Wingmasters to Wilson Tactical & for $45 they will convert it to chamber 3". IIRC just involves making the shell opening larger in the receiver.