Glock 22 Gen 4 Slide Wear

This is a Glock 22 Gen 4 that has roughly 300-400 rounds through it. Would you say that this wear is normal or excessive? I don't care about the finish but the gouges don't look right. I have 9mm Glocks that have way more rounds through them and I don't see this wear on any of them. The gun functions fine but I was wondering if this wear is normal. Thank you for your help.

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