What cam cam and lifters we're you running when you had a failure? Did you lose a lobe? That is a nice pass especially for a first run!
I had a Howards cam & Trend Tool steel lifters, running the hard lifters made it fracture, Flaking the nose of every lobe, That is what Dwayne suggested as the cause & I agree with him, quite a few people have had the same results that I did, I probably would have been ok if I had not used Tool steel lifters, very expensive mistake,although cam & lifter people said things would work GREAT LOL, I just did not want to take another chance on Solid FT cam again, a lot of people have NO problem with plain EDM lifters.