What i'm saying is that anyone who supports a 15 round mag should support suitcase mags or jeep-mounted mags or whatever lol...
not "is it practical", rather, "do you support any kind of limitation on how many bullets ANY gun can carry?
It's a very hard line to draw. What is practical to one person is not practical to the next. I'm with Avxo on this one, I don't think I could say where it should begin or end.
To me, a 30 round mag is no different than a 10 rounder, I'd just have to do a mag change a couple times (which is no big deal, as HH6 has already attested to, we can do a mag change in almost no time, and without ever taking the weapon out of our shoulder) but a drum seems impractical and unwieldy.
To someone else, a 30 round magazine may seem like it has no practical purpose and can only be used to kill people. It's all in the eyes of the beholder. To me, a 200 round drum has no purpose as they are not reliable, are unwieldy, are hard to change, and are generally impractical.