7mm-300 WSM

[white van man]

Hi Guys,
Anybody got the finished case dimensions for a 7mm-300 WSM, or know of any literature available.
Cant find anything on the net.
Cheers Steve.

 

[finnbear270]

Might be some help here?Here's some good info:https://www.longrangehunting.com/( and there is a discussion within that forum.)
Vince B's 7mm WSM Record-Breaker (7 Win Short Mag)

7mm Cartridge Guide

 

[sikadog]

Send me your E mail adress and I will send it.

 

[Sinistral]

Hi Guys,
Anybody got the finished case dimensions for a 7mm-300 WSM, or know of any literature available.
Cant find anything on the net.
Cheers Steve.

As it’s a wildcat there isn’t a SAAMI drawing. There is for the .300 WSM which will be necked down to 7mm-300WSM.

https://saami.org/wp-content/uploads/2018/01/Z299-4_ANSI-SAAMI_CFR.pdf#page=118

The 7mm WSM which gives the same ballistics didn’t make it. Too much competition from the 7mm RM, and it has a unique case to prevent it chambering in the .270 WSM. The .270, .300, and .325 WSM share the same case, so it would be easier to neck up the .270 WSM to form cases for a 7mm-300 WSM.

 

[white van man]

Got it thanks,
Thanks for the quick response.
Cheers Steve.

 

[foggy]

The whole essence of the 7-300 wsm is to utalise the longer neck

of the parent 300 case, as the 7wsm has a very short neck due to the shoulder being pushed forward so as

not to allow it to chamber in the 270 wsm.

 

[sikadog]

How on earth you get a 284 bullet down a 277 hole beats the hell out of me.

 

[Kalahari]

I don't know anything about the case dimensions, but I do know an orthopaedic surgeon specialising in shoulder injuries!

David.