318 to 390 stroker

Seen that number before in that catalog, wyrm.... as best I have even been able to find, it is a mistake. They show the same 9.578" in the KB line for 318's. If you work the numbers for their advertised static CR's, you have to use that 9.578" number to get there.

AFAIK....Magnum should be nominally 9.585"...LA at 9.600". If this number IS correct (which I doubt), then I got some 318 CR corrections to make by about 1/3 point!