I think the problems with the 5,6x61 SE vom Hofe stem from the early recommeded use of unsuitable powders. By not using these powders now recognized to be outside the proper burning range, by using only newer data and also by using newer types of slow burning powders, (H 870 was an early one but there are even more choices now), these problems seem to have been solved. I used my 5,6x61 SE vom Hofe to shoot 4 feral goats just yesterday.

Regarding 5,6x57RWS, it has a thick neck for a particular reason, but it seems to me that this neck probably also contributes to it's fine accuracy. It's only been a problem to me in that other brass cannot be suitably adapted to fit, even larger cases necked down. I experimented with the expander ball size and, having stepped up a few thou., and this is now one of the most accurate rifles I've owned - and this with a light sporter barrel. It also has the advantage that you can use smaller caliber inserts to fire .22 Hornet and .22 WMR. The Hornet especially is accurate at 100m fired from the 5,6x57 rifle ! This makes this rifle a very good one to train young people on as it's a full sized sporter with low recoil Hornet loads. They can then graduate from those to shoot deer sized 5,6x57 loads without having to get used to a whole new rifle, different trigger, etc.