Are you talking the regular red or the gold? The gold series have both sprockets nitrided.
I've never had any issues with the Rollmaster sets and get pretty good mileage out of them. I pulled my 265 down last year for rings and bearings and decided to throw a new chain on while it was apart (rollmaster TC set) - I had about 70,0000km on that engine at the time and there was less slack in the old chain than there was on a brand new Comp cams timing set I put on my brothers 318.
No issues so far running the rollmaster dual row sets with a tensioner either.
