Method for making low clast bullet and bullet made by the method

This invention relates to a method for manufacturing the small-chip projectile in oil well operation, characterized in that the shell case is die cast with aluminum zinc alloy, wherein the weight ratio is: zinc 75-98, aluminum 25-2; the weight ratio of the nodular graphite cast iron shell case is: carbon 1-5, silicon 1-3, iron 92-98. The projectile comprises shell case, booster, main charge and medical shield, wherein the front of the shell case is tack conical, and the booster is set in the front of the shell case; the rear of the shell case is cylinder shape; the medical shield is set in the shell case, and between the medical shield and the shell case inner it sets the booster and the main charge. After gun perforation, the shell case chip is small in powder or particle shape, which does not damage the sand control pipe column and the well facilities.