Just bought a Savage Arms Model 116. takes a .300 Win Ultra Mag. When i bought it, the ammo they sold me was .300 Win Mag. So of course being all excited to shoot the new gun, took it to the range and took care of ten rounds. They loaded in just fine, chambered, fired, and the case ejected just like a text book case. Afterwards, i was looking at the casings versus an unfired round, and they had expanded ever so slightly. Hence why i am posting on here. Is it ok to continue firing these rounds in this gun? Thanks!