Ulfberht rifle with Bill Alexander and Kevin Collins.

[stanc]

Given that the case head size is the same as 338LM (0.588), Bill planned from the beginning that the Ulfbehrt could use 338NM, if requested.

I'm sure it could. After all, both rounds have about the same OAL, too. It's just that the Norma round is the .338 equivalent of 6.5 Grendel, having a relatively short, fat case and therefore able to use bullets with longer ogives than the .338 Lapua.