Go with someone experienced if you must. The numbers don't tell the story on case hardened receivers. Typically receivers that were case hardened were low carbon steel that could not be hardened by heat treating. Case hardening allowed carbon from charcoal or leather to sink into the red hot steel but it only will go a maximum of .020 inch. Most case hardening will be less than .010 inch. This gave a receiver that would resist cracking through or breaking because the core was soft but resisted wear and corrosion to some degree with a super hard skin. If you case harden modern receivers you will have to draw or soften the hardness because they will harden through and be brittle. Since 50,000 of pressure will be 6 inches in front of your eye maybe you should look for a modern receiver and enjoy the old Mauser on the wall
