Sorry about the thread necro but I bought some 300 wby nosler brass based on the info in this thread. It's a bit cheaper than weatherby/norma brass so I was hoping it was the same thing just headstamped nosler. It weights the exact same as weatherby brass. I also have hornady which was significantly heavier and remington 8mm rem mag which I fireformed to 300 wby that was even heavier. Not sure if 8mm rem mag and 300 wby by remington weigh the same but it's a simple neck down and it's good to go.
I for one am convinced 300 wby nosler is the same as wby/norma based on the fact their weight is identical.
