Originally Posted by
JohnDThompson
No. E.g. 11-ball x 1/4" retainers for bottom brackets hold the same number of balls you can pack in without the retainer. 20 x 3/16" retainers for headsets hold the same number of balls you can pack without the retainer.
i think you need to measure and count your balls, john.

Got any part numbers for those caged ball assemblies you mention?
actual dimensions of the cage assemblies, or the specific applications they're made for?
pics?
Seriously.. i'd love to see them, and order a few!
do the campy antiques fit anything other than antique campy headsets?
here's the pic i see for 11x 1/4" caged BB bearings...PS, it won't fit a standard Cup/spindle English BB assy... 11 loose 1/4" barely fit a cupwith maybe a 1/8" open space..... every std. english BB cager i have is 9 ball count.... the example below fits something else, entirely.
https://cyclebabac.com/product/bb-bearing-2/
on the bright side... i just re-sorted, and more granularly categorized, about a hundred caged ball assemblies, including a few rare old school campy ones i'd forgotten about, and re-ordered some 5/32" balled 1" headset cagers.

most caged assys. are two balls less than loose installs, IME... although some low end ones are two less than that, even... kiddy bike ones.