Reloading manuals are far more effiecent and far more reliable than labels on bottles of powder. Dont make that mistake. Dont trust that a little extra is OK. If you dont know dont try it at all. If you still dont know ask. Doesn't matter who, just ask. If you cant find a true realiable answer then dont do it! Just because a 223 and a 222 (for reference is only one number off) never assume they are close enough, never assume I (as in you) am skilled enough to make it work. You will waste more eyes than you have trying to figure that one out. Powder might be the same. Bullets are close. Primes are the same. Cases are a tad bit different in the fact that the manufacture of the die sets makes a seperate die for it. Then be sure to get the die for what you are reloading. (is that last statement confuses you just ask). Powder is not powder. One burns hotter one burns cleaner. One burns faster. and so on and so on. These things can be found in the reloading bibles and books. Produced by Hornady and Nosler and about 30 other different manufactures all already trying to look out for your saftey. and never skimp... Buy what you need and if you cant, wait till you can. Hate to see a new member leave the site so soon.