^^^
Any BDC reticule is just a series of stadia set out at certain intervals to give you an angular measurement, either in minutes of angle or mil radians. They can be used for any cartridge so long as you have an idea what your muzzle velocity, bullet weight, bc and zero are. Plug these data points into any decent ballistics calc and set it to return elevation drop in MOA. You can then see exactly where your trajectory will intersect the reticle stadia.
However, just because it says '223' on it will not make it correct for every rifle and ammo load in that chambering. It will be set for some mythical 'standard'. If you plan to use a BDC for anything you should run the ballistics for your own load and rig (if at all possible).
Look up Bladeracer's thread on this bushnell scope for more info.