300 WSM, 300 WM, 300 Wby actual H2O case capacities?

[stanley52]

Ok so Noslers data has these cartridges (300 WSM, 300 WM, 300 Wby) with h2o case capacities significantly lower than other numbers being thrown around the internet. Can anyone shed light on what the real numbers are for any if these cartridges or just any info in general to point me in the right direction? Thanks.

 

[elkaholic]

Ok so Noslers data has these cartridges (300 WSM, 300 WM, 300 Wby) with h2o case capacities significantly lower than other numbers being thrown around the internet. Can anyone shed light on what the real numbers are for any if these cartridges or just any info in general to point me in the right direction? Thanks.

They are pretty close to 80, 90 and 100 depending on brass. I think I measured the WSM WW brass at 81........Rich

 

[Ridgerunner665]

Nosler's numbers are the "usable capacity"...with the bullet seated.

 

[stanley52]

Ok wow pretty obvious looking at it now. Thanks guys