If you can keep your ....that is YOUR reloaded .223 brass separate from any other .223 brass on the range, I would highly recommend the RCBS X sizer die.
I resize/decap (for now) with the RCBS X-sizer die with its mandrel in the up position.
I use this tool from Hornady:

to see that I am bumping the shoulders of the cases back ever so slightly, say about two thousandths or three thousandths.
You only have to check maybe the first five cases in a run or batch to make sure everything is dialed in and locked in place. Then you can start cranking the brass through.
WHOOOOPPSS!!!
Let me back up first...for lube I use Dillon lube. I put a bunch of cases into a large ziploc bag. Open the mouth the bag up, and give the lube bottle a few pumps. Then I close up the ziplock bag, and then roll the cases around inside the bag.
Oh...yeah, before I start I will squirt some WD40 on a Qtip and swirl that up inside the resizing/decapping die just get rid of any dirt or maybe even some rust.
So yeah, just by trial and error I figure out if I have the resizing/decapping die screwed down far enough into the toolhead/press, based on what that Hornady tool tells me.
So I get a bunch resized and decapped....okay?
Then I go over to my workbench where my corded drill is clamped up tight in the vise. The drill has a trigger lock on it, so it can just run and run and run without me having to touch it. I chuck the .223 Possum Hollow Cutter in the drill, and then lock the trigger on.
Then I run a few cases into it checking it for the correct length.
Now, normally, you would be trimming your .223 brass to 1.75", but since I am using the RCBS X-sizer die as per its instructions I trim to 1.73"
This is how the Possum Hollow Cutter works:
http://www.youtube.com/watch?v=i42nDelSKf8Okay?
So now you have a whole bunch of trimmed, resized, and decapped .223 brass.
The next step is to tackle the burr inside the case's neck.
You can do it two different ways.
1. the slacker way....tumbled the brass in corncob or walnut media for an hour or two. supposedly the medial will knock the burrs off. the problem with that method is that you need to then use a Universal Decapping Die to knock out any kernels of media stuck in the flashhole.
OR
2. You can use the same Possum Hollow Tool holder chucked in your drill still and this time take out the cutter and replace it with a handheld deburring tool, like this:
http://www.youtube.com/watch?v=volkNAxUiOoOkay?
so now your brass has been trimmed (to 1.73"), deburred, resized, and decapped.
Now, you can just prime the case by whatever means you normally use.
then charge with powder like you normally would do (with maybe the exception of reducing the powder charge because now the case is 20 thou shorter. My reloading manual or the side of powder jug might have listed something like 24.6 grains as a starting load and then say like 27 grains for the max load. so I just picked a round number in the middle, which IIRC, was 25 grains.)
then seat the bullet like you normally would. if your bullet has a crimping cannelure, even though the case is trimmed 20 thousandths shorter, I would still seat the bullet so the case mouth lands on the cannelure.
Then crimp as you normally would (into the crimping cannelure).
Then what I do, to get all the case lube off is to tumble the loaded rounds for like a half hour.
And then use a case gauge to see if your ammo will fit into a .223 chamber.
Then stick them into one of those blue flip top lid boxes either a hundred or 50 at time. With the box on a flat surface, look across either all the headstamps or all the bullet tips to make sure all the rounds are the same height.
Then...and THIS IS THE KEY PART!!!
Somehow mark YOUR brass so that you know that it has already been trimmed to 1.73"
Now go to the range and shoot!
Collect your brass back...maybe looking for your tell tale red laundry marker stripe across the headstamps, pack up and go home.
Once home, tumble that 1.73" brass just by itself. Keep it segregated.
Stick the RCBS X-sizer small base die into your press or toolhead. Screw the mandrel down. Lube the cases like before and then decapp resize like normal.
You can watch the X-die video here:
http://www.rcbs.com/guide/#videosIt shows a cut-away X-die and how it works to keep the brass from growing.
then prime.
then charge with powder.
then seat the bullet
then crimp
then vibrate tumble the lube off.
then case gauge.
then box them up.
then stripe them with your red laundry marker across the headstamps.
then go to the range and shoot them.
collect your red striped brass back.
rinse and repeat as necessary all the while skipping the brass trimming step.
sounds like a lot of work, doesn't?or you can just go to the gunshow and buy a case of steel cased Wolf or Bear for about 25 cents each round and forget about the headaches and logistics tail of reloading bottlenecked rifle cases.