I use CCI QUIET in my 22LR for rabbits at a friend's farmlet near a built up area. At approx 700 fps it has about the same noise and power as a noisy PCP .22 air rifle.

Just for a laugh I bought a pack of Lapua .308Win 200 grain FMJ to try in my Tikka. It's meant for a suppressed rifle but us peasantry aren't trusted with such evil tools here. I'm told it's about as loud as a 22 magnum. After I work out the bullet drop any remaining rounds will go towards bugs bunny. I'll have to make those shots count though, A$93 for a pack of 20 in Perth! At least the brass is well worth keeping...