Re: 4000 fps in a 7mm STW w/140 Bullet?
Jack O'connor just rolled over in his grave! The 270 is capable of taking large game at that range and more. Mr. O'connor proved it many times over his 30 year career, and he did it before quality powder and bullets were available.
I have never fired a 7stw but you'd be hard pressed to find any rifle that will shoot 4000fps safely and accurately larger than a .224.
I'd consider finding a new smith, this one sounds a little off the charts.