I just bought an 8x57JR (said to be a .318 by the seller) Simpson Jager V.drilling that has a 9/85 date code. Is it possible that the 8mm mess was standardized by 9/85 and S&B 8x57JR ammo is OK? I've ordered some S&B ammo but it's 2months backordered so I can't fire it yet.