Each gun is different in what it likes .Start with ball and shoot 1-2 boxes then buy&try several brands defense loads find the one that your firearm likes .Some firearms take a while to break in some don't but if you are going to carry it you want it to function with what you feed it .I know that can be expensive but your life is worth it. Holsters & grips are the same way you really don't know until you try and buy and that is expensive also