How many of you have run factory ammo out of your .300 RUM's across a chrono ? My reloading stuff hasn't arrived, so I havent gotten to start loading for my Sendero yet. A friend gave me a few older (6+ years old) Remington 180gr loads for it, so I could shoot it a few times. Not sure if it was the cloudy day or not, but it only showed an average of 3180. Does that sound about right ?