I know that you asked about a .177 and this is the Air gun forum, but for less than $10.00 down at the hardware store for a 100 pack of CCI CB 29 grain shorts and the .22 that you probably already own, that .22 CB at 710 fps would be quieter, deadlier and easier to shoot than a pump up air rifle. As a kid I loved my pump up Sheridan .20 air rifle and it sure helped develop a 10 year old's shoulder muscles, but while I still have it, With the huge variety of ammunition available including that sub sonic quiet stuff, a .22 is more practical for me now.
