does anyone know the barrel contour of a win classic stainless in 375 h&h?

factory tupperware is marked heavy bbl on the inside under the barrel channel.

a mickey stock inletted for a std/mag contour does not except it.

I'm sticking my neck out so don't behead me. I think it's a 5.5 contour like the douglas bbls.

Try these factory contours.

Lilja Barrels