Thats a....Loaded question... buahahaha! Buy once cry once. My lesser quality equipment keeps me away from my bench, and my higher quality stuff brings me to it.
You need a powder measuring device, I like my rcbs lite charge master. Pm me for the reducing insert to get.
A press, I like my forster coax. It makes accurate ammo and swapping in and out dies is quick, painless, and accurate.
Buy the best dies you can afford. Call me gucci, but I wont buy a seating die if it doesnt have a micrometer top. I like forster and redding dies. Get a "redding type s" full length sizing die and a micrometer seating die from either manufacturer. You will need redding bushings to go with them and need to get your brass before you know what size to get.
Mandrels are important. I went with century 21. They make one with a window that is cut out so you can see where your brass is in the die. I got the black ones and they work great. Im sure the steel ones work great too.
Buy the best brass you can find. ie lapua(best) or adg, peterson, alpha,.... Search for threads here on best brass manufacturer and go with something that has a lot of votes. That way your not fighting your brass trying to get accuracy.
Get a good micrometer caliper or two. Digital is easier starting out. I had my hornady calipers die on me for no good reason and I splurged for the mizuho's and never looked back. Worth it between the two imo.
Hornady case and bullet measuring tools- hornady oal gauge and headspace tool. Both look similar but are different and essential. They go on the comparator.
Brass trimmers...oh brass prep....how I loathe thee....! I went gucci on that one eventually and just got a henderson. 200 pieces of brass perfectly trimmed, chamfered, and deburred in 30 minutes, instead of 3 days. And no blisters. Follow your heart on that one!
Get at least 2 50 slot loading blocks. You can get higher capacity ones, but 50 seems to be a good amount. I like the mjm ones on amazon. They are rectangular and in in straight rows, each row is numbered for convenience, and one will accomodate multiple case head types. Also get somewhere to put your loaded ammo. Ammo holders of some sort. I got mjm ones also.
Case lube of your choice. I started with Hornady one shot but make my own now from a lanolin and alcohol mixture. Look up lanolin case lube video by ultimate reloader on youtube. Buy the stuff on amazon with your other amazon items. Super easy. Very effective, not stinky chemicals.
Brass cleaning. Minimum is a dry tumbler. Hard to go wrong with most of them. I dry tumble and wet tumble. The big wet fart is a great option. Look it up and it will make sense. Wet Frankford Arsenal Rotary Tumbler.
Primer decapper. Lots of options. I do the Lee die. My brother does the frankford arsenal hand thing. He likes his. My wrists arent good so I prefer to use the leverage of my coax press.
Bullet puller. The hammer type. They're all the same and very effective. I got an rcbs one with a felt pad in the bottom so it doesn't ruin your bullet.
Powder funnel. You can use the cheapo plastic rcbs powder funnel and be fine. It sits on my powder thrower like a decoration because I use the area 419 set that has multiple caliber adaptors. *excellent* And it will save you from dumping powder all over the place on accident. Saves money if you plan on loading for more than 3 different calibers.
Priming tool. Lots of options. I went with the rcbs bench mounted tool. Works great. You will need to get the case holder to go with that for each specific cartridge.
Reloading manual. I'd get two different ones to reference against each other, they dont always agree.
Theres probably some stuff I forgot that you will find out along the way, but that should get you loading sub half moa ammo with good reloading technique, good components, and a good gun. Thats how I do it anyway