The load given on the rifle is the service or regulation load. The load fired at the proofhouse gave about 25 - 30% more pressure to achieve a margin of safety when using the prescribed factory load. Up to 1940 a German gunmaker could tell the proofhouse for which factory load a gun was to be proofed. The 1940 proof law ordered all guns to be proofed for the highest pressure factory load then available for the caliber. At the same time these pressures were set up as maximum for any ammunition made for a given cartridge.