Before the 7mm STW was considered a wildcat, I wanted to do the same as you. I spoke to quite a few gunsmiths, and the majority suggested the use of a Ruger #1 due to its single shot action. There isa Ruger #1 Standard 7mm Rem. Mag. athttp://www.gunsamerica.com/guns/976499186.htm for $735.00. You could probably use a T/C Encore 7mm Rem. Mag. Good luck.