After a LOOOOOT of time mental optimizing, I finally decided that having a revolver and carbine in matching calibers was actually a disadvantage to ME.
Consider the following:
1) I handload
2) I like subsonic lead or subsonic 180gr XTP loads in my .357
3) I would want Lil' Gun-powered 158gr super loads in my carbine
4) I have one set of .357 dies
5) Different impact velocities demand different bullets, different loads require different powders (little efficiency gained)
6) either constantly reset the .357 dies or buy two sets, which would then be a risk for confusion and ka-boom
7) main desire for .357 lever is to make it perform like a .30-30 w/ more rounds
8) I'd never want to mix/match those two rounds, and doing so would mess up sight calibration
Conclusion: want .30-30 performance? buy one, buy a set of .30-30 dies, bullets, and powders. No risk of ammo confusion.
So my ideal pairing is a .357 blackhawk with heavy subsonics and a .30-30 with 150gr Sierra softpoints.