I own a Crossman 760b myself. Got it a few years ago to get rid of pesky squirrel that was trying to chew up my house
It's a really fun little rifle. Light and pretty darn accurate. Also gave me ability to shoot in my backyard. I just couldn't do the same with my Mosin M44 carbine :-D
But then I got a budget .22lr rifle (Marlin 60) and discovered Super Colibri ammo... I do not shoot anything else anymore! (in the backyard). What a rush! Virtually quiet (no louder then air rifle), very powerful. I do not think I would shoot a squirrel anymore with Crosman. Just not enough energy for a sure kill. But this thing will do what it supposed to.