Which of these four would be best suited as a defensive round if one were so inclined to choose one of these as a defensive caliber??? I'm leaning toward the .45 Super because you can shoot .45 ACP through the same gun without having to change anything on the gun like the barrel, any and all opinions would be great........thanks guys......

The one with which you can best make holes in the target where they count.

Seeing as how the ammo for none of the above is readily available at most sporting goods shops or Walmart, I'd say none of the above. Plain old 45 ACP with a good 230 grain JHP bullet is pretty hard to beat for defense. The extra power of +P or Super will do little other than to slow down a follow up shot.

stans is right on the money! With ANY of your choices over penetration would also be an issue.

FWIW I carry 230HP, standard pressure, and I don't feel a bit "under-gunned"!

Ed

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Under penetration could also be an issue! When hollow point bullets are going fast, (and all of these cartridges can push a bullet fast), its penetration is most likely to be less, not more. With non-expanding bullets, like FMJ, higher velocity results in deeper penetration.

As Captain Dylan Hunt says, "It's never easy!"