It's a toss up in my experience. I've thrown 300 games where I can honestly say I didn't deserve, others I did. I think it takes more luck to shoot the 300 even if you're a skilled bowler because of so many outside variables. I can hit the pocket all day long and make spares to shoot the 800, 267 is no small number but it's not 300.
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The original Pin Krusher