You will probably find that written into most warranties. I believe Glock also uses the same language. This is a liability safeguard for gun makers and lets them off the hook if you blow up one of their guns and/or yourself using handloads. However, you did notice the langauge read 'reloads/non-factory ammo'? Here reloads do not include those commercially made yet it is those reloads that are the ones most often found responsible for handgun failures and accidents, as I understand.
