There are nine different versions of the 760 pumpmaster, see the link (below) and find your version. Check the parts manual for a diagram.
See the link below for the owners manual.
No the Pumpmaster has more power and can shoot BBs or Pellets
See the link below.
See the Crosman link below for the diagram.
There are 12 versions of the Crosman 760. Which one do you want.... See the link below
11 mm dovetail rail
600 FPS - Pellet 625 FPS - BB
There are several versions of the 760. See the link below for all of the crosman models with dates and manuals.
If:It is close rangeYou use enough pumpsThe crow is standing perfectly stillYou are an excellent shotAnd you put it right through the crow's eye,Then yes, you can kill a crow with a Crosman Pumpmaster 760.
Pointed Pellets will have more penetration.
It is not recommended, but it's up to you how you take care of your rifle.
The Crossman 760 Pumpmaster, It's Powerful, Safe and works like a real gun