So you are saying shooting the rifle make the steel's molecular structure change and it becomes softer ? If you read my post you would see the rifle is not just going to "fail " . The headspace will just increase [ just like an Enfield , but the Vet is stronger ] until it will not set off the round . I have put 1000's of rounds through about 20 different Vetterli's of all calibers with no problem . I also shoot my 8mm Gras rifles , again with no problem and they have NO locking lugs . But my experience as a custom gunsmith and specializing in old military rifles, running a ballistic lab , testing ammo pressure , developing new cartridges , test firing over 2000 different military rifles over 30 years , running military rifle matches every week for 30 years at my range , pales to yours on Youtube .