You can use Google as well as anyone here. Just search for '.223 load' There will about 1,690,000 responses. Plenty of data!
You may have wondered why nobody has offered up a compendium of links. That's because no Internet load has any credibility whatsoever. And that includes the loads offered up around here.
You must be able to take suggested loads back to some published source (printed loading manual, powder manufacturer's manual, manufacturer's web site) for validation. You must know that the proposed load falls within the realm of minimum to maximum for the identical components and COL. There are some shortcuts you can take after you have a bunch of experience but these will be revealed over time. In the end, you want to use loads that are backed up by liability insurance. "Billy Bob's Hot AR Loads" doesn't qualify!
So, given that you need some form of published source for reference, why not start with a couple:
"Sierra Rifle & Handgun Reloading Data"
They have a lot of information for AR-15 type loads (and separate data for bolt-action .223) and about 18 different powder possibilities for the 55 gr bullet alone.
"Speer Reloading Manual #14"
They have information on 14 powder choices for 55 gr bullets. Plus all the other bullet weights.
The Hodgdon folks have about 15 loads for the 55 gr SP:
You can get MAX loads at the Alliant site (but no published minimum other than discounting MAX by 10%). I use Alliant powder but the site is not my favorite.
For rifle, Sierra is my first choice and it has data for a 55 gr Soft Point.