Cam & Timing Set Questions

I have just installed a Rollmaster t/c chain set on an engine [ not a Mopar ] I am building. Chain was quite tight, tighter than I would like. Rotating the engine by hand, I heard this occasional 'clicking' noise; the noise was the chain trying to follow the cam sprocket & finally flicking off. Have to investigate further, not sure what the problem is, but my guess is a machining problem with the cam spkt.