I'm still hesitant on the 223 in a Montana if for no other reason than I own a Colt 6720 set up with light scope and mounts that can take care of my 223 needs, especially if the kids are involved.
I'm leaning 243 since I have a nice Sako L579 in 243, so I would kill two birds with the reloading components. I know the same could be said for the 223 but I still give the edge to the 243 for deer, even though I know the 223 will get the job done.
