Purpose? Firearm?
Quiet varmint hunting, plinking, ?
I would think any subsonic ammo would be pretty quiet with a suppressor.
CCI SV is subsonic and cycles most semi-autos.
There was a discussion recently on RFC that may help (or further confuse :dunno: )...
I picked up a nearly new 3” SP101 for $500. Rock solid pistol, built like a tank, decent trigger and laughs at 38 spl + p and very manageable with full magnum loads.
This might be more that you want to spend but I think this would be a really cool suppressed 22
https://guns.bridgeportequip.com/product/henry-h001tspr-frontier-22-shortlonglr-10-lr-16-short-24-tb-blued-american-walnut-right-hand