There was a division of handgun metallic silhouette that fit .22 WMR.
There was some handloading.
I never heard of primed brass for sale, what I read called for pulling factory bullets, adjusting the powder charge, and seating a Sierra MK.
Shoot in a STRONG action with tight breech, usually a Contender.
That was 30+ years ago, I don't know where to get the details now.