Kevin,
Was your 722 a long action or short? I was somewhat unhappy with the 660 because I could not use round nose bullets in it. The Hornady 350 was my choice in the 458 mag and wanted to use it in the 660. But Barnes had the semi Spitzer, so I was good. I'm just now going to start with a cast LEE semi pointed bullet that with COWW weights out at about 480.
My experience with cast in the early 80's was with the Winchester Big Bore 375. Ran the Lyman 375449 GC bullet with a full throttle load of R7, which was quite impressive for me. Up until that point my casting experiences were a mixed bag. Of coarse I "knew" that if you got some leading, make that bullet harder.. I scrubbed some lead out of barrels, but that 375 was a perfect match for a guy who did not know what I did not know. I, just by luck, hit on a perfect combination of gun with gas checked cast bullets that preformed right. I got groups of 1 1/2" to 2" at 80 yards, while the best with jacketed 200, 250 silver tips was 3" plus at 80 yards, the Hornady 220 did about the same. But, 40 years ago I must have been much smarter than I am today.
Back to Rockdoc's question, that was a close to prefect cast gun. If I still had that gun, I would not be sending JES a 30-30 to be bored to 38-55. That Winchester BB had decent bullet weight at close to 280 gr, good diameter slug, in a fast handling fine looking rifle. The BB's before the angle ejection was a beautiful rifle. Can't warm up to the angle ejection Winchesters, even though I will admit I do own a trapper 30-30. But I keep it down a the shadowy end of the rack.
Now I've gotten to thinking about the perfect cast bullet lever gun. Now choosing the perfect cast lever, that's going to be tough..