Calling any Winchester expert...

[300WSM]

Looks like that's for the WSSM, Winchester Super Short Magnum...

That's what I am working with

 

[300WSM]

What cartridge is the rifle you are wanting to convert. You'll likely need a different magazine box and a follower spring in addition to the trigger guard assembly.

WSSM

25 to be exact

 

[300WSM]

Okay, let me get this straight....
You have 2, m70 25wssm's 1 ultimate and 1 super. You want to make the super an ultimate (or other with a drop floor plate)
Why dont you just swap the stocks and see if it works? Use the internal parts from the super to be sure the work with the ultimate stock and bottom metal you have. If the internal box doesn't work, try with the ultimate. The screw spacing should be the same for both wssm's @ 6-3/8", not sure you could get more concrete than that.
Then you just need to search Midwest or Numrich's to find a wssm stock (and internals if needed)

Hello captain obvious.....

Which is me.

Sometimes the simplest of things eludes us.


Yes indeed trying this will tell me a lot.

I'll post my findings later today

Thx brotha