I have a Ruger American Standard rifle (as "standard" as any left-handed bolt rifle can be) also in .223 Rem and the differences between your potential Predator and my rifle are the green stock color, the somewhat heavier barrel contour, the threaded muzzle and the factory Picatinny rail. Otherwise they are the same.
Mine is a joy to shoot. It is a true 1 moa shooter with decent handloads and feeds and ejects flawlessly. I installed a Nikon Buckmaster 4.5-14x40 SF scope in the factory Weaver bases on mine and I shortened the trigger return spring by about 2 coils and the trigger pull is now a very clean 2.5 pounds. Despite the fast 1:8 rifling twist, it is very accurate with 55 grain bullets but should stabilize most bullets up to about 80 grains.
If you get the Predator, you should be as pleased as I am.