RE: opening up dies
Why ? When I needed dies for a wildcat round (6mm 30-30 Imp.) I discovered that the lead time to get them was 12 weeks and they cost $140. By purchasing a set of .243 Win dies...Lee RGB dies at $12 a set and a set of cheap 7-30 Waters dies for about the same money. I could modify the seater in one and the sizer from both to get a set of working accurate dies for about $25 and a lead time of a week. By using dies that already have been cut you can use their precut dimensions to your advantage and save a lot of work. That my friend is why...........
Handloading dies are only case hardened and machining is easy once that surface is cut. I did not re-harden the modified dies because for the very small amount of sizing they do it will never be necessary. Handloaded ammo from this gun using these dies will shoot very very small groups. It is a nightmare for prairie dogs out to 350 yds.
RWK - you need .25 Souper dies.