I know a guy that had something similar happen. He was shooting H1 when he also felt a sting (on his nose), and wiped off a little blood. The next day, he noticed what looked kind of like a blackhead. He poked at it and "tink", a pellet dropped into the ceramic sink.

And no, I don't question the need for eye protection. And it was the only range open at the time, it didn't come from somewhere else.

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