If I was orbiting earth in the ISS,?

and in theory: aimed a gun in the prograde position and fired it, would the bullet go off into deep space, or would the bullet just orbit earth but with a higher apoapsis? I'm asking if the bullet has enough force to break Earth's SOF. The gun would be a SIG SAUER P226. The round would be a 9×19mm Parabellum.
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