I will disagree with the stated flatter trajectory of the .41 Magnum. This especially with handloaded ammunition. I didn't tweak the .41 I had that much, maybe could have if I had kept it longer.
But I never really got the 1600 fps out of my .41 with the 175gr. bullets. As I recall it was actually 1550 fps, compared to the .44s 180 gr. JHP at 1715 fps. Maybe I could have bumped it up had I kept it longer, but the difference in trajectory just wasn't there.