What shotgun works best for home defense?

[Alan]

I've been looking into getting a shotgun for home defense and could use some input. I'm debating between a 12-gauge and a 20-gauge. I know 12ga packs a punch, but I've also heard the 20ga is a bit easier to handle in tight spaces due to less recoil. Does anyone have thoughts on which is better for indoors?

What are the key features I should prioritize, like barrel length or stock setup? I want something straightforward that I can rely on. Also, any brands or models you've had good experiences with would be helpful.

Lastly, how critical is training? I've shot shotguns before, but not extensively. What kind of practice should I be aiming for to feel ready?

 

[WAYNO]

Both gauges will do well for home defense, but 12 ga is my preference. If for no other reason, there's a better choice and availability of loads.
And if a 12 ga seems a little stout, there are lower-recoil loads available from multiple ammo companies.
18" is the minimum barrel length, and that length works well for home defense. I always suggest a screw-in choke model. Even at 18", the different chokes will allow some versatility of use. My 18" has iron sights, and does double duty. It's the best home defense shotgun ever, and I've also shot many impromptu grouse with it. I've hunted greenway deer where a shotgun is a requirement. This shotgun shoots slugs very well and very accurately.
My model choice is always a Remington 870, either a Wingmaster or Express.

Training? As with everything, practice and familiarity are extremely necessary. Shotguns are not always magic. They actually do require training and practice on pointing and/or aiming. Shooting a pattern board at different distances is a real eye opener about performance.
Stocks? That's a purely personal matter. Since my shotguns might perform double duty, a conventional stock is necessary for me. Some folks prefer mall-ninja stocks and they are the best choice for folks that prefer them.

 

[ORDuckBeav]

I think @WAYNO gave a pretty good answer to guide you along. I have a shotgun in the corner and it's a 12ga. Living situations are going to be different so, you will need to take that into consideration. For example, I live in a small one-bedroom mobile home and am surrounded on all sides by others. Walls are going to be thin so, I don't want to be shooting through them with slugs or 00 buck. Mine is loaded with a game shot. I would probably never grab it first since my EDC is by my bedside.

If a 12ga was all you had already and didn't want to spend funds to by another shotgun, you could always use the short shells with adapter. I've used them in the past and they work pretty well. Below is my RIA M5 12ga with 18" barrel that resides in a corner.