I just picked up my Christmas present,a Kimber Montana in 7mmWSM. I would like to use the excellent Nosler brasswhich is available in 300WSM. Other than running it through a Redding full length die (or I suppose even a neck size die) and trimming the length are there any other considerations? Does Lapua sell WSM brass?orNorma?
Thanks

Nosler Brass is ready to load out of the box.

I'd go with Norma brass. That's all I use. I neck size new brass becasue no matter how weel made a case or what the price, necks get dinged. I use it for my 270, 270 WSM, and my 300 WSM before I decided to downsize my arsinal.

FWIW I had to go to a small base die on my 270 WSM because th FL die wasn't pushing the shoulders back to spec. If you can chamber a necksized WSM case after a few firings, great. Be aware you may have to go to a FL or even small base die.

Converting 300 or 270 WSM brass is a conversion that I don't think I'd want to mess with. The 7 WSM's shoulder is moved further forward so that it won't chamber in 270 WSM's. You would have to Make a false shoulder and fireform the brass before you could use it with full power loads. I hate having to waste a good bullet fireforming brass when I can just buy the brass ready to load.

From the 6th edition Hornady manual. Distances from the base of the case to the BASE of the neck:

270 WSM 1.824
7 WSM 1.857
300 WSM 1.802

............................DJ