A carry gun should be light enough that you DO carry it. A pocket cannon does you no good if you leave it in the gun safe.
Dan Wesson .357mag with a snubbie. 6 extra rounds. Every day. 125 gn Hornaday XTP at 1200fps. Working on a carry load for 110 grain XTPs if I can find 4 or 5 boxes at once.
It helps an awful lot if you practice with your carry piece for 25 or 30 years, constantly and consistently!