3 wood dent/mark question
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I very much doubt that will make any different in performance. More likely it will cause the club to breakdown before it affected performance. Keep an eye on it, if it gets any bigger you might have a problem, otherwise should be fine.
If it breaks the likely failure mode would be the club feels very very different, or it doesn't go as far. Basically you'll know.
First of all, welcome to the site!
I highly doubt that small ding will be a concern. Your club is made of steel, a very resilient material that will remain strong through a lot of damage, and the club is designed for impact. If it develops into an actual crack then I'd get it looked at, but it looks like a standard dent.
There's a hybrid in my bag not too different from that club, except it has marks from hitting off rocks and all sorts of crap. There's no paint anywhere near the leading edge, and it has about a million bash marks like an enraged beaver had a few bites on the sole. Hopefully you can ugly that club up some by hitting some good shots with it, then those marks will be a sign of trust.