.44-77 PP bullets.

[Distant Thunder]

Arnie,
That's what I found here with the MTM boxes I use for my .45-70 levergun loads. I did order some MTM RLLD-50-16T boxes and I'm thinking they will be the same but are 4" tall so at least they'll fit. As near as I can figure the squares are like .620" at the bottom, just tight enough to be a PITA.
There'll be a way to make these work.

Kurt,
I gave some thought to making a wood block to fit in some kind of ammo box and I may do that yet.

Don,
I didn't think about the WSM. I don't know anything about those new fangled cartridges!

It's interesting how many cartridges are up around .580 to .605" diameter and not many, except the .44-77 & .44-90 BN are .625"+. Of course the .50s are .660" on the rim but the boxes I use for my .50-70 are not tall enough for the .44-77. The one box I have for my .50 that holds 50 rounds accepts the .625" rim but I would like to have more than 3" for a cartridge length.

So the smaller rims, .615", are not any problem for the function of the cartridges?