Any gun manufacturer will say handloads/reloads void your warranty. They have to have that policy because they have no control over your handloading practices. The few times I've had a problem with a gun, the factory did the warranty repair & never asked me if I shot handloads through it. I suppose they have no way of knowing unless I tell them. But, if a problem showed excess pressure or other sign of a bad handload, they would probably not repair it under warranty.