I don't completely agree. I think they should add..."shoot the most powerful caliber you're capable of carrying at the time." As I've mentioned numerous times on my podcast, there are times when it's simply not possible to carry anything that can't easily fit in pockets of dress pants and not look real suspicious. Not often, but in my case, it happens. Then, the .380 get's the job.
I generally don't have that problem. My tuckable iwb works well then, especially when I got dress pants which easily fit 1.5" belts. Through if it's uncomfortable I'll just carry my .380 backup only instead.
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