As the proud owner of a 1984C in .357 I offer these tips.
First, you should really consider some reloading gear if you're not set up for it. My .357 gobbles ammo faster than all get out.
Second, if you do start to reload, pay attention to cartridge length, because too long of a cartridge will not feed in a levergun without modifications.
Lastly, pay attention to bullet profile. Some don't like to feed SWC, some do. The safest bet for a levergun is some kind of a flat point, like a jacketed soft point, HP, RNFP, or something along those lines. A sharply pointed bullet, under recoil, may cause the bullets in the feed tube to detonate. I'm sure you can picture the unhealthiness of that scenario. Cast bullets are a natural in a levergun, that's all I shoot in mine.
I hope you enjoy your purchase,whatever it may be, and welcome to the Lever Club.