Bronsons, which is kind of a bummer. It seems like at least on the set of G3s I have had, the shields seem to attack the rest of the bearing at some point and cause them to lock up. You can fix it by removing the shields, but if I wanted shieldless bearings I would have ordered shieldless bearings.
I ordered up a set of Bones REDS Big Balls, and when I took them out to clean them found that 6 of my 8 plastic retainers were broken. They were still rolling pretty smoothly, I just knew they were kind of dirty. Ordered some replacement cages for them, we'll see if that happens again or not. I didn't skate anything big with them, there was no massive force, other than just me being a big dude.
I guess the moral of the story is never stray from Bones Swiss. They've been the best for 40 years for a reason.