I think the fellow from NY was talking about rifled shotguns, not a smoothbored gun. In any event, 1.5" at 100yards is usually a good group for an off-the-shelf .30/06 with a 4X scope with factory ammo, let alone a sabot'd shotgun slug. I am not saying some rifled barrels aren't capable, just that I've just never observed it done. I have seen 2-1/2" and 3" groups at 100yards from sabot'd slug laods in rifled 12 bore barrels mounted with scopes.

Well sire actually never put a ruler to the paper, but I would call 3 shots 2 ragged holes, 4x scope off the bench, pretty good wouldn't you. Yes these are sabots, custom rifled/cantilevered mounted barrel in Remington 1100 and another on the Ithaca Deer Slayer II, that has the barrel screwed into the receiver. These things are truly deadly, no brag, just fact.