Yep, as Imped advised don't sweat it when you can barely get any grease into that type of joint. It is just such a tight-tolerance joint that it barely takes any grease at all to have it properly lubed.
I use red Chrysler-type grease everwhere on my TJ as well as my Currie joints just because that's what I started with. Auto parts stores sell tubes spec'd for Chrysler, Ford, GM, etc. so for me it's just easiest to go with the Chrysler spec'd grease.
Know too that not all greases are compatible with each other which is another reason I just stick with the Chrysler stuff for all of my zerks... and at last count there were something like 31 of them.