Can anyone help me? I have a single shot New Haven model # 273A .410 shotgun that a friend lent me. I know it takes 3" shells (stamped right on the barrel), but I have a question. A friend wants me to use it to go after hogs in our area, and I can't find any 3" slugs. Would a 2.5" slug shell work in this gun, or would I be looking to remove my head if I tried it?

edit: it would probably help if I put the right model number down, it is 273A not 237A

I'd like to thank all the experienced shotgun experts for their advice and sharing of knowledge. You've all been so helpful.

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Sure,a shotgun with a 3" chamber will fire 2.75" ammo just fine.

I wouldn't choose a .410 for shooting big hogs, but it might be OK for smaller ones if the gun is accurate and shots are 50 yds and under.

Thank You, UncleNorby. I guess that means the 2.5" shells I was eyeing aren't going to work, eh?

Sorry, I meant 2.5. Yes they'll work, but they may not be as accurate as a 3". Give them a try and see.

There is no safety concern because of the 2.5" shells.