Do Predator Metalmag .177 Pellets Fit Into 9mm Long Magazine?

Hey, do these pellets : .177 Predator Metalmag 8.5grain (someone told me they are 9mm long)
fit into pellet magazines for Crosman Vigilante?(exactly 9mm long) if not, Gamo Rocket should fit, but do they provide comparable penetration for pistol?(metal,plastics, gel etc)

would like to hear answers from someone who actually tried it 
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:)

also what is best pellet for this revolver for normal shooting?(like mid weight lead pellets?)