See the link below for the owners manual. Crosman has all their owners manuals online. There are four different versions of the model 760. From the link select the one you want on the left when the link opens. You will have to scroll down to find it.
No the Pumpmaster has more power and can shoot BBs or Pellets
See the link below for the owners manual.
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.
See the Crosman link below for the diagram.
First of all the 760 Pumpmaster can shoot any brand of BB's without any harm. But if you want Copperhead then I suggest you look at any sporting goods store. Like Walmart or Kmart. If you can not locate them then I suggest looking Online at Pyramydair they are the largest air gun store online.
There are 12 versions of the Crosman 760. Which one do you want.... See the link below
600 FPS - Pellet 625 FPS - BB
11 mm dovetail rail
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.