There's actually another issue here: how much raw power (muzzle energy) can you get out of the available holllowpoints versus the solids, in minirevolver barrel lengths.
Turns out the difference is huge - in favor of the hollowpoints.
The CCI MaxiMag +V and it's TNT/+V cousin are by far the most potent loads from short barrels. And CCI's 22Mag rimfire ignition is second to none - the only round that comes close to those two is the Winchester Supreme 33grain and in my personal experience across three guns, it's *not* as reliable as the CCIs. CCI 22Mags are as reliable as quality centerfire or if there's a difference, I haven't seen it in over 1,000 rounds.
Those two CCI rounds are so good, I believe they're the sole thing making minirevolvers and other short-barrel 22Mags worthy self defense items. Many of the other 22Mags perform little better than a 22LR from a short tube.
The MaxiMag +V has a small hollowpoint cavity and from a 2" or under minirevolver is either not going to expand, or it'll punch pretty deep first if it does.
If you're still worried about expansion at the sake of penetration: fill in the cavity with epoxy. You'll get hardball effects but with more raw energy on tap than the various available FMJ profile factory rounds.