Wrag, thanks, that article claiming the mall shooter had terrorist motives is disturbing to say the least. Could inspire more armed citizen augmentation here like Israel.
Laz, I'm ultra conservative with firearms so didn't carry a shell under the hammer in that Colt .38 because I couldn't in my older Ruger single actions. Now with a new Ruger Single-Six and its safer hammer mechanism, I'm comfortable with a shell under the hammer. Still not sure the Colt was safe that way though.
Xargos, I haven't shot anything but standard ammo through my 12-gauge Coach shotgun. I was intrigued by some of the wild novelty rounds available for shotguns, but apparently most are illegal here in Virginia.
For something different, you might want to try some of the little Aguila 1 3/8-inch minishells with four No. 1 buckshot and seven No. 4 buckshot. Only fired them at paper so far, but don't think they're lethal enough for serious home defense (still use regular No. 1 buckshot for that). They won't work in many shotguns except double- or single-barrels.
Laz, do you consider the .357 sig more potent than the .45? I've fired through the main calibers with rental guns (9, 357 sig, 40, 45) and thought the 45 had more oomph. For some reason I really like the 40 the most. I'm still thinking about getting an XD, but haven't yet decided between 4- or 5-inch barrel and 40 or 45 acp.