Not everyone can be like you and able to count backwards from 30.
Though on that subject, I bought an electric hi-cap a few months back. I used it at one gameday, half way through the second game I returned to the safezone to exchange it for midcaps. It was electric, it performed flawlessly insofar as its function as an electric hi-cap. As a hi-cap it was awful, it was just impossible for me to use any kind of stealth - and a few other issues, non of which were related to it being electric.
I'm going to sell it. I contemplated keeping it to give to any friends I might bring along, but i'd rather see them reload - or fail at, reloading, than miss out on some great gameplay. I rarely say this, but each to their own when it comes to hi-caps, if it works for you then awesome.
However, if they invented a quiet 500rd magazine, would I use it?
I already thought of a way to make a 450 hi-cap quieter, fill it with lots of vertical rods so the bbs can only contact each other vertically.