I would rather do the forming work in the press than by fireforming.
What do I need?
Actually .38-55 should be a lot easier to find. Starline makes it in two different lengths, as well as Winchester. Only one maker of .375 cases.The 38-55 is a better case to form but probably just as hard to find.
I figured this out three or four threads ago.He's in Australia Craig.
That's what I do. I assume your concern about not holding them vertically is that they might not form concentrically? I haven't found this to be an issue. Besides, are you really certain you can hold the rifle perfectly vertical? The case will likely tilt a bit anyway.It seems I may have been misinformed about the necessity to fire-form with the barrel in a vertical position!
So after forming them you just chamfer the necks square using a lee cutter and case length gauge, as if you were just trimming to length!