One shot from this weapon will freeze any zombie solid (even gas zombies are stopped cold). However, a second shot is required to shatter them.
Unlike most combo weapons, kills with this weapon get the same number of PP (200, modified by magzines) whether or not Chuck has the combo card.
In Dead Rising 2, kicking or otherwise striking a zombie frozen by this weapon will cause it to shatter, but no PP will be awarded for the kill.
Neither of the glitches mentioned above occur in Off the Record: post-combo card kills are awarded 400 PP, and the PP bonus is awarded for striking frozen zombies. This, plus its increased effectiveness against psychopaths, makes the Snowball Cannon a far more formidable weapon in Off the Record.
This weapon does not work against Psychopaths. Against looters or mercenaries, it will not cause them to freeze, but enough hits will neutralize them.
Whenever this is shot at a zombie, any nearby glass will shatter, even if the zombie is nowhere near the glass.
In Off the Record, you obtain this Combo Card after defeating Evan MacIntyre, and it is relatively effective against other psychopaths.
The Snowball Cannon you get from Evan MacIntyre in Off the Record is NOT affected by the combo card. Meaning you will not get 400PP per kill with it, only 220 PP is awarded per kill.