W-W Super brass...
Visionz 45--Winchester brass of whatever headstamp enjoys a very good reputation with reloaders. Since it's old--you don't state HOW old; 10 years, 25 years, 50 years, what--I'd keep this lot of brass separate, keep a record of what loads were loaded into and fired from this brass, and keep an EAGLE EYE on the condition of the cases.
5 boxes--hmm, that's about 100 cases, no? About the right number for a lot of cases to reload and fire, anyhow.
I'd neck-size them, not full-length resize them--that means using them in only one rifle, a bolt gun, BTW--and just check them carefully for signs of fatigue before each new reloading cycle. FL sizing shortens the life of any case.
Signs of fatigue include: Loosening of primer pockets, development of a "stretch ring" inside the case just above the base, and cracking of necks. On firing, the side of the case might crack. Seeing any of these, in more than just a couple of the cases, I'd scrap the whole bunch. But, in the meantime, I'd have them for firing for however many reloadings the lot of cases survived in good condition.
Now, this is me. You must do what you feel safe with.