OK, let's break this down.
41 Rem Mag 44 Rem Mag
case OAL 1.290 case OAL 1.285
41 mag is .005 longer
case diameter .434 case diameter .456
44 mag is .022 larger
rim diameter .492 rim diameter .514
44 mag is .022 larger
bullet diameter .410 bullet diameter .4295
44 mag is .195 larger
Yes, the 44 is ever so slightly larger than the 41, but you have to admit, it's not that much.
Now, if you were to load the 41 to 44 pressures, with the same weight bullet, which one would have the better ballistics?
Why are 41 mag pressures lower than the 44 mag?
I'm sure some of you 44 mag gurus can make the numbers look like the 44 is far superior, but the bottom line is, if you point a 41 and a 44 at a game animal, it's going to have the same ending result. So which one are you more comfortable and more accurate with?