Well I received 2 of the 5 .270/ 30-06 cases today. Too small an opening to fit in the AAs comfortably. You can force them in but that's not a solution. Problem is after looking at the specs the AAA cases (.222/.223 sized) probably will be too tight a fit for the cells as well. They will probably all be going back. I spent some time going through the list of the 50 round cases they have, and going to all the wiki pages of different kinds of ammo and had to find the best size. My findings are basically .454 Casull (possibly too short, but may work) for AAs (I just ordered WSSM size to be sure as it should definitely work for AAs) and .357 size will work for AAAs. Will let you all know once they arrive. Here is a pic of the .270/30-06 case with a AA trying to squeeze into the grid.
You can see the grid where the AAs were pressed in start to bulge flex quite a bit. I think the new size cases I ordered today should fit well. AAAs do fit in this case but they are shorter than the grid so taking them out of the case wouldn't work unless you added spacers in each compartment. I hope the new cases will be the correct size. Consider this as me taking one for the team, once I find out the correct size.
I will say these are nice cases and for a little more than $2.00 a case to hold 50 cells, it is a downright steal! You can't even get a 8 cell holder for that price...