@Skinnersblade
Remember it's for a No4 action not a No1.
They are different bolt heads if you could source a no2 and 3 bolt head it would be greatly appreciated mate.
He is building a 25/303 using and Australian made sportco barrel and has properly head stamped brace by Bertram Brass. When it is completed it should be the equivalent of the 257 Roberts.
A rimmed Roberts is a cool idea.
It could even end up an Epps Newton improved as I have offered to lend him my reamer if he wants.
I think he will be very happy with his standard 25 tho as it will beat the crap out of the 243 and on an SMLE NO4 ACTION.
Bob