The volume of water reduced from about 50ml to approx 7ml, but no sign of precipitation. Initial concentrations were about .1Moles of both reactants.
Moles is not a measure of concentraton. Do you mean that you started with 0.1 mol (moles) in 50 mL, or that you started with 50 mL of solution at a concentration of 0.1 M (molar)?
The solubility of KCN in water is about 11 M at RT. So for 0.1 mol, it should start to precipitate at <9 mL. If you started with 50 mL of a 0.1 M solution, ie 5 mmol, you shouldn't expect a precipitate until you're down to <0.45 mL.
Do you have any evidence that the reaction has worked? Are you following a literature procedure or did you just read the equation on Wikipedia?
I still think you should get some experience with safer reactions before attempting this.
Note that cyanide salts may be controlled substances in some parts of the world, so at least make sure you're not breaking the law.