What is the bullet weight when the max pressure is 12,000 cup?
CREATE TABLE "38_comparisons" (
  "cartridge" text,
  "bullet_weight" text,
  "muzzle_velocity" text,
  "muzzle_energy" text,
  "max_pressure" text
);
SELECT "bullet_weight" FROM "38_comparisons" WHERE "max_pressure"='12,000 CUP';