I've have stumbled on a load that might fill a niche for some people. I worked up a load for my 629 Classic w/ a 5 inch barrel. So while at the range, I decided to shoot some of them out of my 44mag barrel. It's the 44Spl. from Speer, 200gr. GDHP. Well shooting at 100yds, I was able to get a group of about 3 inches for 10 shots out of the Ultra w/ the 44mag barrel. The powder used was Unique, 12grs. and I was not really trying for a MOA group. Also was using a 8" shoot-n-see target. The group was high and to the left. Since then, I've not been able to use the same load since I 've run out of Unique.
But this load shows promise of a good varmit load.
Hope this might help some with their 44 Maggies.
Dennis