Off my head I can't name which. But yes the .375 Flanged Magnum is often a dividing line between larger framed DRs and medium ones. So sometimes it should be able to be found on smaller actions. Other times on the heavier action.

Some makers will draw the line at the 9.3x74R. And anything above on a heavier action.

Heym is a maker which has a lot of action sizes. At one time if I remember rightly, eight different action sizes.

A smaller framed .375 Fl mag DR would make a handy DR.