That Giraud does look awesome. The $400 price tag doesn't.
I agree this is the way to go. No inside chamfer, no case stretching, no neck lube. But I use the Lyman M die. It does the expanding and the chamfer in one die/step. I can't imagine going back to reloading a bottleneck rifle cartridge without one.Station five has a Sinclair carbide -.002 expander mandrel. This is the one they sell for case neck turning. They also have a tool steel version that is considerably cheaper. The mandrel irons out any burrs on the inside of the case neck and expands it to -.002 without stretching the case like a pull through ball can.
When I reload, the first station has a RCBS expander mandrel that slightly flares the case mouth.