I've killed dozens of possums and a couple of raccoons with a .22 LR and can't say I've ever shot one with a hollow point....
I take that back. I've shot one possum with hollow points. I got him out of the tree with an air gun, but it didn't finish him, so I grabbed my 4" Taurus 94 which happened to be loaded with some Tiger-Cat hollow points (yeah, I've never heard of them, either, but someone gave them to me; they're Hecha en Mexico, so there ya go). I have no idea if they expanded or not.
Mostly, I shoot solids, not because they're superior or inferior, just because they're what I have the most of. Head shots will do the job, no expansion needed. Realistically, anything you're going to shoot with a .22 is going to die when you put a bullet in the brain pan or the vitals whether it expands or not.
I keep a 10-round magazine for my Remington 597 loaded with Winchester Super-X 40 grain solids for possum and raccoon duty. I wouldn't have a problem using CCI Mini-Mag solids.