Can you recommend a subsonic ammo that is quiet for backyard pest control? The regular 22 l.r. ammo is too loud for backyard shooting. Never shot with subsonic ammo. Is subsonic ammo much quieter than the regular 22 l.r.? How does it compare to the noise made by airgun (i.e. .22 pellets shots)? I hope there're some quality and quiet subsonic ammos out there. Or, I may have to get an airgun for that purpose. Thanks.