The Gold Dot projectile is very good, probably the best JHP design today, and is what Proload uses exclusively. In a 5" barrel, the 230 is possibly a better bet than the Cor-Bon because the extra weight does come in handy for some tasks.
The Gold Dots have a major advantage in carbines as they strongly resist "being driven too fast and coming apart" - the bond between the lead core and the copper jacket is the very best in the industry. In a pistol-caliber long gun, Gold Dots are THE choice, period, end of discussion.
However.
It's a "delayed expansion" round to get a "deeper punch". Which means it needs velocity to expand well, and in a 3.5" or so barrel I would question whether you'll get the velocity it needs (in 45ACP). This issue is why Proload also offers the 185grain Gold Dot 45ACP.
BUT, the 185 Gold Dot doesn't offer a significant weight advantage over the Pow'R'Ball and that latter has MAJOR advantages in both feeding and expansion. At 165grains, it's down in weight.
Upshot:
3" barrel gun, Cor-Bon Pow'R'Ball. Period.
4" gun, I think I'd still go Pow'R'Ball, unless my gun shot a LOT more accurately with 185 Gold Dots (Proload is the best of the Gold Dot suppliers, Georgia Arms almost as good (and cheap if you want to shoot 'em in practice), Speer themselves are in last place oddly enough (but they're still OK).
5" barrel: Gold Dot 230 by a nose, unless the gun had feed issues, in which case the Pow'R'Ball's "roundnose profile" wins. Gold Dots aren't *bad* for feeding, they're quite good among JHPs, but the Cor-Bon answer rocks.
Longer barrel, esp. carbine: GOLD DOT 230 above all others.