I haven't shot those particular loads when I had my various .44 carbines. I had a 1894 Winchester Trapper that would sling 310 grain bullets at 1,350 for punching deer so I never used anything else.
I would have to think that at the speed those barnes or peregrines would be flying from a 16-20 inch barrel, you are definitely going to get some expansion. But I guess the question would be... has anyone on here used them in a muzzeloader? That's a pretty common load for a .50 cal shooting .429 sabots.
A muzzleloader and a .44 mag rifle are going to be shooting them around the same speeds. So if they work in one, they should work great in the other.