I got to thinking this process through & can't come up with a good answer
I shoot a 58 Remmy in .44 & my loading process is to take the measured charge from the metering spout in the flask, dump it into a brass "transfer case" (a .44 Mag shell casing) & then drop that into the chamber, top off with wad & ball then ram. I do this to avoid the possibility of an in-flask KABOOM!
Step & repeat 5 more times & then cap.
Isn't this redundant, as in if I just dumped powder into a different sized case (.357 mag for 29 Gr by volume) & put that into the chamber aren't I doing the same thing