Camshaft defect ? Burned by roller lifter ?

I was sooo happy because i finally found a 380hp cam for my 300hp crate , they are hard tp find but some friend freaked out by the chunk missing and others said that it was nothing maybe just a casting default and it can buffed out by a machine shop easily.. some are saying that the previous engine missed oil... long story short i bought a lightly used cam for a roller lifter engine / 360 magnum crate , your opinion guys?

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