90% of springers sound reducers. most PCP's have shrouded barrels very quietA high end indoor 10m indoor target rifle and one that will dispatch a fox are pretty different.
For shooting inside one of the major factors for me (I shoot smallbore, 4p, hp etc) is accuracy and loudness. A 4p air rifle, meant for 10m only shoots maybe 400-500fps and is quiet enough to use in a house.
A 22 cal or bigger springer that shoots a pellet big ebough to kill a grouse is going to be loud and I have no idea how loud the 30 cal airguns are.
This^^^^^^^^^Not cheap but for the money a great air rifle.
SELLING - RWS Diana Model 48 Air Rifle .22 Caliber
RWS Diana Model 48 Air Rifle .22 Caliber – New, never cocked. Sidelever action, spring piston, Beechwood Stock; 900 FPS MV; Cocking Effort 39#; Blade and Ramp Front Sight; Windage and Elevation Adjustable Rear Sight; 11MM Dovetail Grooved Receiver; Rubber Recoil Pad; ~ 3.3# Trigger Pull...forum.accurateshooter.com
Whats the rifle in the middle please .....