He’s better off ordering an annealer.
You can go quite far with 100 pieces of brass if you don’t stretch the primer pockets or over work the brass.
I had 23 firings on 200 pieces of Lapua 308 brass. I retired the brass when I swapped barrels.
I have 338 Lapua brass (Lapua) with 10 firings of 90gr of H1000.
I fired Lapua 308 brass 40 times and never annealed it once.
The neck begins to spring back so I just made a .001" smaller bushing, on the lathe for free, and keep shooting.
These were max load charges, on the cases, after 40 reloads, the brass keeps stretching, and needs trimming, cycles, you will see the headspace seperatetion similar to the magnum cases described., then discard the cases it can be seem and felt with a hook tool internally down at the head there is a distinct bump in the case where it should be smooth.
I have shot belted magnums for many years, never annealed them, and never had a problem with them, just use the shoulder to headspace after the first firing. No special tools needed.
Even fired a too hot load with a QL recommended powder, with a 200 gr SMK st 3280 fps, didn't blow the primer but expanded the pocket too much, a stiff bolt lift, but the whole case came out no seperation problem.
I form lots of wildcats and anneal them because of all the brass movement on some. A flame and a homemade holder made in the lathe, the brass turned in the lathe with a touch flame to the neck/shoulder...works great. No expensive annealer needed ...at all.
Some test were done and even way over annealed the brass, but they all shot about the same group size, with the over annealed slightly better...LOL. Annealing brass is not a high tech endeavor .
Spend your money on whatever...don't care, or anneal on ever firing, but I have better things to do...time consuming and brass isn't that expensive for many calibers.
I, only anneal when case forming, in most cases. And it will help with shoulder spring back especially in forming cases, but it's better, or at least add, turning the complete neck and shoulder back in the lathe, with the exact angle, example 308, or 30-06 to 8.6 Blackout, for a perfect smooth fit in the chamber. Depending on brass condition from manufacturer, annealing on the first step will collapse the case. A special home built die is made the first step can be done with a dry case, but a light spray is used here, shoulders come out very nice.
Or sometimes basic cases come in all hard from Starline and requires annealing in every step... so for me it depends...but I don't use it on already factory formed cases for the caliber I'm shooting.