Train realistically! That’s the key to all conceal carry says Jim who talks about here about his personal experiences of pocket-carrying. He makes a lot of great points and gives a really good lesson on pocket carry.
Pocket pistols not only are more difficult to shoot than full-size guns, but they also tend to have a lower ammunition capacity, especially when compared to a full-size, double-stack pistol. And even though small-caliber bullets are more effective than ever, they are still less effective in comparison to larger rounds. (More here)