Hello.  I have not done a lot of work with the 230-gr. Gold Dot but have gotten average velocities of 864 ft/sec from a 5" Kimber and but 2 ft/sec less from a friend's 5" Les Baer.  From a 5" STI Trojan, it averaged 857 ft/sec.  This is pretty consistent ammunition it would appear.  From a 6" Kart bbl, I got 912 ft/sec, which is pretty much what I'd expected.  Using a SIG-Sauer P220 w/4 1/4" bbl, average velocity was 823 ft/sec.
Gold Dot bullets have expanded pretty uniformly for me when fired into water or super-saturated newsprint and have worked well in the animals that I have seen shot.
A friend of mine shot a man in the head with this load a time back who was trying to get another law officer's pistol.  The bullet didn't exit and it did the 
trick (so to speak) in a pretty graphic way.
This round feeds flawlessly in several of my 1911 pistols and not so well in others.  IF you opt to use this load, I sure suggest trying it for reliability. This is true of any defensive ammunition/gun/magazine combination in my opinion.
Best.