The guys that first wildcatted 6.5WSM when the 300WSM first came out, first may well have been Terry at Territorial Gunsmithing, said that top quality $400. stainless barrels were getting 4-600 rounds from the 6.5 WSM before accuracy went south.
AFter research of a new barrel hardening process and seeing that my accuracy is intact and velocities increased noticably, I had the reamer made for my 6.5WSM improved. Based on the longer bodied 7WSM, moving the shoulder forward with close to the same shoulder angle.

I know a guy that has 6000 rounds in his 7WSM's with no throat errosion so its anticipated that I will never wear the 6.5 Stretch out. Just use my 6.5 WSM sizer and screw it out a tad so as not to crush the shoulder.

Should smoke 100grain bullets and do it with only 65- 70 grains of powder!

Neal