You know what would get you the exact same results at far less cost? Buy a Hornady LNL AP, some extra bushings and TWO (2) complete powder measure assemblies. it's tinkering with the powder measure that I find eats the most time up when I switch calibres.
Set up powder measure A for your favourite .223 Rem charge and powder measure B for your favourite .40 S&W and you're off to the races. The Hornady LNL AP uses the same primer setup for small rifle and small pistol, so that stays the same and changing dies and powder measures with the hornady quick release bushings takes literally one second per station to do and is completely idiot proof. All you'd have to do is swap a new shell plate on and presto, you've switched from calibre A to calibre B in under 1 min flat on your first time doing it. Seriously, it's really easy and your results are inevitably repeatable to the last time you used your press in the new calibre with the quick change bushings (the dies don't move forward or back and you don't re-adjust them, you simply swap them out).
If you don't believe me, find someone with a LNL press and see it for yourself in action.
this is the way to go! Changing the powder measure is a pain in the ass on the LNL AP. Shell plate and dies with bushings take seconds!
as to reloading pistol vs rifle, there are many differences:
-dont have to trim or lube pistol rounds, which is a time intensive process.
-you will be up and running for .40 quickly while .223 there is a longer learning curve
also the hornady powder dispenser is picky with powder type. for example, it will not throw a large flake powder like unique very well, while it will have no problems with a small powder like titegroup
the other thing is time vs money. There are savings in reloading but it will use up plenty of time. The most expensive part is the bullet.
I recently bought 1000 .223 for $0.41 per shot (federal black box tactical, $360+tax), to buy components for reloading you are looking at:
1000 lake city 55gr projectiles: $120 + tax (budget shooting supply)
1000 primers: $32 +tax (lebaron)
1 lb powder: 27 + tax (lebaron)
Cases: Free (supply own)
Lets say you use 22 grains of powder per round, then with 7000 grains/lb, you get 318 rounds, therefore lets round up to 3lb for 1000 rounds.
Total cost for reloading 1000 .223's then becomes $330 (after taxes OR 0.33 per round) + your time + gear price.............. about $75 bucks of savings per 1000 but lots of time