No one had had any of this for several years.
I just ordered a K of them.
They have 16K left (you don't have to get a K, it's about $10 a box of 50). Maybe high, but no one else makes this quiet stuff. 4 cents a round cheaper for a K.
It is slow speed (420 fps muzzle), and very quiet. Quieter than a supersonic pellet from a pellet rifle (bit louder from a handgun). No gunpowder at all, just the fulminated mercury of rimfire primer as propellant. Obviously not long range stuff, but quite accurate at yard distances.
It is low power 20 grain bullets (not 40gr like most 22LR), and lacks enough push to cycle a semiauto. So you have to handcock each shot from a magazine (or single load). They warn it may lack power to exit a full length rifle barrel, but I've shot this stuff from 2 rifles for many years and never had one hangup (with or without an oil patch down the bore). If you would use a rifle, an oil patch before shooting is a good idea anyway.
The Super Colibri (at 600fps muzzle), is still out of stock.
I don't know if Carl would appreciate this. I'm not trying to increase Aguilla or Midway USA business, but trying to help out our membership who might want this specialty ammo.
https://www.aguilaammo.com/products/22-colibr-i-long-rifle-subsonic-powderless-lead-bullethttps://www.midwayusa.com/product/2506163096?pid=163096&pr_rd_page=4&srsltid=AfmBOop9_g48gpYEbyhQTYYO9bZhBpSDFGmPQnMXkCRwrTv1yUHMCzYE