.410 vs .429
20-30 grains of bullet weight.
Those are the physical differences.
Like I stated in my first post, the .44 has a wider range of projectiles to chose from. For hand loading and especially commercial ammo.
I use 210 grain Gold Dots and the 230 grain Keith Type in my .41s. Which should take care of most anything. If I added the 180 grain Barnes and say a 280 grain LBT WLN, I'd have everything one could need
, although perhaps not want
So if you like the .41, go for it.
Model 57 .41 on the left. I also have a Model 58 S&W and a Ruger Blackhawk .41 Mag, so thats a few anyway.