Mike,
I ,yesterday, recieved my copy of "Der Waffenschmied" issue # 45, as mentioned by Kuduae( who authored one of the very informative articles)above. I had agreed with Kuduae that Collath used the Brenneke designed normal 8x72R.However an article in "Der Waffenschmied" included a discussion of different cartridges used by Collath.This article included a "cut" from an old cataloge which shows two different 8x72R cartridges, one being the normal one and the other being a clearly "necked" cartridge.Both these cartridges showed the same load(except bullet wt. not given), but the "necked" cartridge was shown with superior ballistics.I'm not sure if this was an advertising ploy of if one or the other loads was mistaken.All that aside,the casehead looked to be the same or very similar;so the above suggestions for making cases would still work. If the cartridge turns out to be the necked one,you wouldn't need to resize to 32 nearly as far( maybe a 32 Win spec die would work).I load for mine with 8x57 dies, with expander assy removed. This would work for either version, whereas the normal dies wouldn't work very well with the necked version(continued fireforming would cause early case failue).The key to using the 8x57 dies is to adjust them to just "kiss" the shoulder(very small in the normal version)of fireformed cases.I hope I haven't confused matters too much.
Mike
