I can't tell the difference between Blazer brass and any other brand concerning reloading usefulness. Variations in brass occur between brands and within brands. From that standpoint there is not lot of precision. When fired, the case expands to fit the chamber, if it extracts easily and has not split, then we are happy. The reloader is even more happy if his die set will convert the case and other components into a loaded bullet that functions. Note that this guy's die set will vary from your die set even if made by the same company.