Evaluate Timing chain sets

Ted,
The engine in question was a Pontiac & RM only comes in red series; cam spkt is not hardened. The faulty cam sprocket mentioned in post #6 also has very rough machining marks on it.

I have three or four RM cam spts here that have tooth wear with less than 8000m wear on them. Teeth have started to 'hook' & you can also feel/see the displaced metal. I know of one gent who went back to using factory link chains because the RM sets wore quickly & this was with FT cams, not high spring tension roller cams.
Cast iron has exc wear characteristics, as seen by the high mileage obtained from factory t/chain sets. So I use those.
RM should nitride or harden ALL their sprockets. Failing to do so is akin to fitting soft metal valve seats in alum heads.