My brother's Walther P-22 does a pretty good job on the raccoons! This setup will conceal in a big coat pocket.
Rather than the Aguila SSS 60 grain with the highest and pretty good accuracy, he goes with RWS subsonic HP 40 grain for exultant accuracy. The cats are sometime right there amongst the 'coons, in the barn. One in the brain pan is very hard to argue with.
If you have much variation in your target distance, the SSS has a very high arch to the trajectory compares to the RWS.
I always used a 22 rifle or a 223 rifle with a big silencer and supersonic ammo around the farm. Once supersonic, the noise level is the same (or close enough!) Just a high pitched crack, and done!
Just remember, this is not TV! All the gun noises are the same so the click of the firing pin and whatever noise the bolt makes are the same, if someone is observing!
My F-I-L had a scoped single shot 22 rifle with a soup can full of steel wool threaded on it. He would use standard velocity target ammo and snipe rabbits out of the garden from a bedroom window, while one of the neighbors mowed grass! Rabbits will often scream and/or jump up high, so having a covering noise often helps! (The gun belonged to the Police Department!). Ivan