Stevens 200 300 win mag to 7mm wsm help

[Dlasure2]

Good day

I have a Stevens 200 in 300 WM that I was thinking about rebarreling into a 7mm WSM.
This will be my first build so I figured this would be the best place to start.
With my doner gun already being a mag is this as simple as a barrel swap or will there be more involved.

[thirty06]

This is an easy swap. Just make sure your new WSM barrel is a small shank.
Barrel is all you need.

[lrpv-shooter]

I would go with a mcgowen for sure

[Dlasure2]

Ok thanks for the info. I do have 2 more questions
I want to shoot heavy bullets so I am looking at the 1-9 twist is this correct
Next question why McGowan

[darkker]

Pretty sure that you need a different bolt head as well, but maybe not; double check.

[lrpv-shooter]

I have done 10 guns with mcgowen and they are great tubes, that's all I will shoot from now on

[stangfish]

Dlasure2,
Are you interested in selling your 300WM magazine?

Modified: Thanks for the heads up Jglover.

[jglover_81]

Your 300WM bolt head will work fine on the 7WSM cartridge

[Dlasure2]

Do I need a different magazine to accommodate the WSM.
If I do then yes I would sell it if it will work I am going to keep it

[thirty06]

Keep your mag box, it will work and probaly with no tweaking.