Yes you´re right, but .375 is a quite a common caliber even here, at least when comparing with the .405. I might also make a .338x53R. Living here in Sako-country, one can´t help stumbling over bullets in .338…

But right now I´m saving money for a totally different project, involving a Baikal over-under shotgun and a .308 Win barrel I have lying around..