I know this is only tangential to the topic, but could you qualify with multiple guns? Like, say I want to carry my 1911 in a waist holster, but I keep a little .380 in an ankle holster, too... What about that?
As for Texas, there are no limits on how many guns you can carry, but you must either qualify for revolver or semiauto. If you qualify with semiauto, you can carry revolvers, but not vice-versa. You could carry a .22 revolver in your back pocket, two 1911s under each arm, a .357 snubnose at your waist, and a pair of .380s on your ankles. That's a little ridiculous, but if they're not visible it's OK with the law.