I have been looking for a new shotgun and most manufactures have stated that putting reloaded ammo through there guns will void the warranty. Is this common or do I just tell them I used the ammo they suggest? Seems like they just want people to buy manufactured ammunition
Every gun manufacturer has to put that in because they don't want to be responsible for someone jacking up a hot load and then blowing up their gun. I don't believe for a second the gun manufacturers believe their users are only going to use factory; heck 99% of the factory shooters also sell reloading equipment! If it turns out to be a ammo issue where it caused a catastrophic failure...it's that dang Winchester White Box again! That is my story and I'm sticking to it!
Sadly, just like they have to print "This is not a toy" on a plastic sack or "Do not eat" on silicone moisture absorbing packets...they gotta put that in there for a CYOA scenario. Honestly, I don't remember the last box of factory I bought for any of my guns aside from self-defense ammo.
It depends on the manufacturer. Most are very customer oriented and will give a lot of benefit of the doubt. For example, a person I have shot with admitted (good for the soul but bad for the reputation!) he got distracted and double charged a round of pistol ammunition that his son, subsequently, shot in a Glock, which blew up.
He called Glock, admitted to what he did, and Glock still repaired the pistol at no charge--once! He was told if he ever did it again, future repairs would cost him.
As others have said, such admonitions are CYA-liability statements that may not hold, depending on the manufacturer and the situation.