Thank you, Well, if that's all true which I presume it is, that answers one of my questions.Maybe this will help? Paragraph 6
About the pre-64 Winchester model 70
Perhaps you have landed on this site by accident and are wondering why all the fuss over some old rifle. Wayne Miller of the Ohio Gun Collector's Association has written an excellent article on the pre-64 model 70, putting this rifle's popularity into proper context, and at the same time...pre64win.com
.585" for 416 Rigby and WeatherbyDid Winchester (pre-64) ever make a rifle with the 416 Rigby bolt face ?
Can a Win .532" mag bolt be modified to work with a .590" cartridge ? Safely that is !