I used to use 450 round high caps. It was very rare that I needed to swap mags in a particulr game - I'm not really a spray and play type

So 2 of those were fine for most game days, just refilling them between games. But I got annoyed by the loud rattle and the winding.
Then I got some MAG metal 190 round mid caps - so 4 of those is roughly equivalent to my old 2 hicaps. All I do is top them up between games and 4 mags is still very easy to carry. For CQB days, 2 in the leg rig, plus one in the gun is all I need

On longer days, I carry all 4 plus a back up hicap just in case!
Never tried the pull cord ones, but I did have a 2500 round battery powered, sound activated (automatic) drum mag for a while

Lots of fun, but very heavy and I didn't use it much