I poured some cerrosafe in my Rossi lever actions and measured the groove diameter just ahead of the throat. They are both about 0.359".
I use the Lee die set which comes with the pistol factory crimp die (PFCD) which I find nice in that I don't have to balance the seating and crimping to happen just-so. However, the factory crimp die sizes the case with the bullet in it. I haven't pulled a bullet afterwards to measure it, but measuring the inside of the casemouth with the caliper (not the best way I know) it measure .357-.358.
So here's my dilemma, if I use the PFCD it will size the boolits to about one or two thousandths below groove diameter. If I use some other way to crimp, I don't think I'll be able to use the ammo in my Ruger Blackhawk. I think the Ruger BH has tighter chambers than the Rossi's.
My Lee 358-125-RF mold casts 'em at about 0.360-0.361. I could try to get a boolit sizing die to get them to exactly 0.359 and see if they would work in my Ruger BH.
I could see if someone could ream the Ruger chambers to match the Rossi's. Bad idea?
I could try reaming the PFCD so that it would only size the case just enough to fit the Ruger. I might already be at that point - I don't know.
I could get a Lee Collet-CD or a Redding Profile either would crimp without that final sizing step - although I don't know if this would really help with the Ruger.
What I really want to avoid is having to keep separate .357 ammo, one for lever actions, the other for my revolver.
If necessary I can get chamber measurements from the Blackhawk, I just know that when I would reload with my 310-tool the cases formed in my Rossis wouldn't fit in the revolver because the 310 sizing die only partially sized them. I eventually got a Lee hand press that can do full-length sizing.