Originally Posted by bsa1917hunter
Allright from what I can gather (from my 3 minutes of research):

http://24hourcampfire.com/ubbthreads/ubbthreads.php/topics/5434483/1

I'd need 300 win mag cases to resize into 7mm mashburn cases. Looks like you can send them thru the RCBS full length sizing die and then fireform. You get about 150 fps over the 7mm rem mag in velocities. Does anyone have a drawing of the 7mm mashburn cartridge so I will have a better idea of what I'm looking at? Thanks guys....Oh by the way I don't like the 300 win mag but have tons of brass and maybe 1 rifle I may get rid of. Sounds like I may be killing more than 2 birds with one stone by going to the mashburn. Am I right??


The 300WM case is awesome when it's necked to .284...and actually has a neck.

Think how awesome that donor will be when those amaxs are running 3,100-3,200fps. smile

Here's the details on the case.

[Linked Image]



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