Cocktails, anyone?
Why SURE!
I keep my Bersa .380 loaded with 4 FMJ's (1 in the chamber) and after that, 4 Gold Dot JHP's. This is what I practice with, this is what I carry. (no jabs for carrying a .380 - at least i CARRY it, a .380 on your person beats a 50BMG at home every time)
My reason? It makes me
feel good.
But really, I consider it an 'escalation of force' - if the weak, lighter-than-9mm FMJ's just bounce off the BG's shirt, then when they're gone at least I've got something that comes out about 500 FPS faster and opens up to nearly 1/2 inch diameter in the right circumstances. In the wrong circumstances, well, it's still gonna be comparable (read: the same)diameter and speed to most 9mm & .38spl rounds.
Thats my take.
In my 7-shot .357 you will find:
1 - #9 shot followed by
3 - 38spl Gold Dot Hollow Points followed by
3 - .357 Cor Bons
My reasons? The #9 tells anybody/everybody i'm very serious about you leaving NOW, stop your threat and leave, plus a bonus chance to live. Beyond that, I'm hoping the sitation can be resolved in 4 shots or less. That way I get to remain in the world of the non-deaf. If it takes more than 4 shots, well, I may have to learn sign language, and the BG may end up in more than one peice, but I'll still be here.
In my shotty you will find:
4 - 000 Buck (3")
4 - 1oz. Slugs (3 - 3" and 1 - 2.75")
These are staggered, with the buck first.
My reason? Well, I must not lie, I copied the local sheriff on this one, except they've got 00 instead of 000.
Welp, those are the only guns I can think of that I use cocktails in, hope that gives you another perspective.
All the folks talking about it being a bad idea, well, it is, for them. Guns have to be reliable, and if to you a cocktail mag makes the gun less reliable, or if you've tested it and it wont feed right (in the case of an automatic) or if you never practiced with cocktails so you have no idea what the difference in feel between shots is, then stick with 1 round. Your confidence alone may make the difference in your survival one day.