What a 22mag needs is ammo designed for optimal performance out of a short pistol barrel instead of an 18" rifle.
22 mag ammo is about 33 cents per round. Not cheap for a rimfire.
Occasionally 5.7 can be had for about 66 cents per round.
I guess when I blinked, things changed.
I see there are now several manufacturers making 22 mag ammo designed for short barrels.
I have seen several videos looking at this ammo type.
It is amazing how well they do in ballistic gel tests even shot from a 2"-barrel revolver.
Hornady - 22 WMR 45 gr FTX® Critical Defense: 1000 fps from a 1.875" barrel
Federal - Personal Defense Punch Rimfire 22 WMR 45 Grain: 1000 fps from a 2" barrel
Speer - Gold Dot Short Barrel 22 WMR 40 Grain: 1050 fps from a 2" barrel