Reloading 5.7x28

[Malawler]

Anyone have any advice about trying to reload this tiny round?

[MaduroBU]

My advice is don't do it. The brass is built to have a lacquer coating that is abraded by most cleaning methods. The data is mostly wildcat and uses tiny powder charges at near rifle pressures. 0.1 grain changes in charge weight can produce drastic swings in already very high pressure levels, which are then discharged in a short recoil pistol with a plastic frame (i.e. the Five-Seven). People hurt themselves with this round because it is EXTREMELY unforgiving of the usual degree of error in standard pressure cartridges.