Possible 1903 bolt body crack?

After being at the range this morning, I clean my SA 1903 as usual.
When removing the bolt, I noticed a strange mark on the bolt body.
Do you think this could be the start of a crack?
Sorry to join as many pictures, but the perspective will be a little better to help you giving me an advice...

Best regards
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I don't think that's a crack but instead an imperfection in the original steel. I don't think there's anything to worry about.

Wipe some acetone on it and see how fast it dries. A crack will stay wet for a while.

Dear sir;
even if I don't show up, that doesn't mean that I don't read the post I started...I simply trust you in relation to your technical opinion!
Thanks for your advice.
@jamie5070 : I'm going to try


Regards