rechamber 7mm weatherby to 7mm STW

[labrador]

Hey Guys

I have had difficulties deciding between the two calibers 7mm weatherby magnum and 7mm STW. I have finally decided for a weatherby accumark in 7mm weatherby magnum. In case I one fine day would like to have it converted into a 7mm STW, would it then take more than a reamer? I was wondering whether the freebore of the accumark would require a special treatment in order to get the job done...

Thanks - Labrador