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I follow Grant Cunningham's blog. Recently, I e-mailed him to ask about front pocket carry. Specifically, muzzling everyone who walks in front of me while I'm seated. His reply was that, as long as the trigger is protected, the gun is safe and I needn't worry. He added that, in public, you will end up muzzling someone no matter how you carry. At matches, I carry OWB at 3 o'clock with a 15° cant. During one match, I cautioned the timer to stand behind my left ear instead of my right. If I carried that way in public, my muzzle would be pointed at the person behind me when I climbed stairs.
I think you’re misapplying the rules a little. First, they apply to
handling the gun, not its orientation at every moment. If they did, the only solution would be to destroy every gun—even a gun in a safe in the basement is most likely going to point at someone the next floor up once in a while. But unless your gun is an absolute piece of trash, you can trust it to not discharge unless the trigger is actuated. Since one of the basic requirement of a holster is ensure the trigger can not be actuated, as long as you have a decent quality gun in a decent quality holster, you can treat it more or less like a gun in the safe, and not worry about its muzzle orientation until you’re handling it.
Second, the rules are deliberately redundant. No one can be accidentally hurt unless at least two of them are broken simultaneously. I’m not saying that means we should ignore the rules at any time, but that obsessing over any one is misguided. If you apply them all with deligence, and know when breaking one is acceptable (not to be taken lightly), you’ve got nothing to worry about.
I’m a little curious as to how tall you are, that a 15° cant comcerned you about muzzling a range officer standing behind you. Sure, billet splatter is possible, if your gun rides at, say, 40” from the ground and points 15° backward, that makes its POI during drawing and tejolsteribg (a valid concern—you’re handling, not just carrying holstered then) is just under 11” behind where it would impact if pointed straight down. It might break a match’s 180° rule, but I’ve got to wonder how close the timer is standing...