I would consider myself a "High Volume Shooter" when it comes to .223/5.56 ammo. With two AR's to feed it is a substantial task.
Here is what I use:
The press is a Dillon XL-650 with Case Feeder. I have chosen to add all the little alarms for low powder level and powder check in the filled case. A beginner can start with just the press for about half of what i have invested or about $500.
Die sets run from less than $30 for LEE Dies up to well over $100 if you want to get the Dillon Carbide Sizing Die as well.
A Scale is a must. DO NOT RELOAD WITHOUT A SCALE. Some do but then again, some like to gamble. I have loaded for well over 30 years and still posses all my fingers and eyes.
A good but not necessarily expensive Caliper. An electronic caliper can be purchased for about $25.
If you are loading a lot of Military Brass that has the crimped primer pocket, go ahead and invest in the Dillon Super Swage. It swages the pocket so primers can be inserted properly and without damage. There are cheaper tools but the Dillon is quick and does the best job.
As for a good load, I load the following:
Powder Accurate Arms 2230 (AA2230) 25.5 grains
Bullet Montana Gold .224 FMJ-BT (Full Metal Jacket Boat Tail)
Primer Federal SRP (Small Rifle Primer)
This round gives me a good 3250 Feet Per Second velocity and the last trip to the range (yesterday) I shot another dime sized group from my M-4.
The Accurate Powder is fairly inexpensive and I found it to burn very clean compared to H-335 or W-748. As for Primers, one can also use CCI, Winchester, Magtech, or even Wolf. All will work well and since this is an AR, not a Bench Rest rifle, accuracy will be more than adequate.
I started loading back in the 70's and kept trying to do it on the cheap. When I found that I couldn't load .223 as fast as I could shoot it, using a single stage press, I stepped up to a LEE Progressive. I found that it was cheap but I spent most of my time trying to clear jams. Missed primers and spilled powder (through the empty primer pockets) made a hell of a mess. I finally bought a Dillon. I went whole hog. a 650 progressive with a case feeder. Toolheads for all calibers I load (.223/5.56, 9mm, 30-06), extra sizing dies so I can batch de-cap, and a power trimmer so I can trim a couple of thousand rounds in a short afternoon.
This last week alone I shot over 1,000 rounds between the two rifles. I have to keep at least 5,000 rounds loaded and have another 3,000 empty cases just waiting their turn.
By reloading I am able to load for $0.154 per round or $154 per thousand. Last look at even surplus ammo shows a savings of at least $150 per thousand. In short, don't go cheap on your reloading equipment. If you plan on shooting a lot you will invest at least as much in gear as you have in your rifle. It will pay for itself.
Nice thing about the Dillon is the ability to change calibers in short time. A tool head, die set, Caliber Change Kit, and slide for the powder measure (so you can change to your new caliber load without fiddling with the adjustment) and you can be loading your other caliber in less than 30 minutes.
For me that's important because I also try to keep 4,000-5,000 rounds of 9mm ready to go as well.
BTW, I'm retired and I don't want to spend all my time loading. I've got lots of shooting to catch up on.
"If I shoot all the ammo I carry, either I won't need any more, or more won't help!"