RoninPhx, I run .432" bullets in both my rifle and revolvers without issue.

I have Ruger revolvers and a 77/44. I use the .432"s due to the throats in the revolvers being .431", and I use the same size in the rifle because I don't want two different sizes, though I am using two different styles. A Beartooth bullets WFN in the rifle and a LCMN DCG in the revolvers.

If the rifle could tolerate anything longer than 1.6", I would have simply used the same load. My revolvers can go 1.725" for the SuperBlackhawk, but the Redhawk can go to 1.775", though I simply use a common load in all three. (I have two SBHs).

I am assuming, and maybe erroneously, you are talking about cast bullets.