You don't say what model Mauser.
If K98, 24/47 or M48 you can remove the front sight by unsoldering then cut and crown and solder the front sight back on.
Or on the cheap if the cheap, you counter bore using a slightly larger than bore drill bit and a drill press, it is farly easy and works good, I have done several and each time accuracy has improved.
Of course a lathe is better but if the bore is not that great paying a smith is a waste of money.
Today is my Best Day.