I don't want to shoot through my house and into my neighbors' so which shotgun ammo?

It is impossible to miss your target and blast your shot load thru your walls AND the exterior of your home AND cross a distance AND then penetrate the exterior of another house AND have any energy left. I know of no recorded incident of this happening with shotgun ammo.

There. I said it. Somebody prove me wrong.

Probably the best way the OP could test this is to construct a target which replicates both his and his neighbors outside walls (exact construction) and the spacing between the two houses. Then shoot these targets from ranges that represent potential shot lines. This would certainly put the issue to rest.

If I had any concerns this would be the approach I'd take.

Regards

The Paul Herrell video did not include TYVEC and foam board and in-between stud insulation and wind barrier. It was just sheetrock thru three walls. Okay, it "eventually" burst some 2-liter bottles but not violently. It did not take into account or replicate the exterior of the neighbors home, the wind barrier, TYVEK, insulation and interior sheetrock just to to have the pellets intrude their abode.

Shotgun ammo is not .50 BMG ammo.

Nitesite, I certainly have my opinion after firing 1000s of shotgun rounds but unless you accurately replicate the setting there is no definitive way to prove the result. I'd like to see an actual demonstration.

I totally agree with your statement that a "shotgun ammo is not .50 BMG ammo."

Regards

Five shots of #4 @ 10 or so yds.
The pumpkin was rock hard. Not rotten.

That's the quick way to clean a pumpkin.

Ha!
That’s “regular” #4, not buck.