haha... I had that coming. I meant the mechanics/physics of fitting more rounds in a space set for single stack. And how well do they work, because it just seems like something has got give. And compromise is not good when it comes to defense!
Have several 8 and 10 rd. Chip McCormick and Wilson Combat Mags. All work as supposed to. Never a Mag related issue with any of them. The 10's do stick out of the mag well enough to make CC a bit difficult unless shoulder rig is used.