What is the length of the gun that has a shoulder measurement of 12.18 (.480)?
CREATE TABLE "264in_6_6mm_and_up" (
  "name" text,
  "bullet" text,
  "length" text,
  "base" text,
  "shoulder" text,
  "neck" text
);
SELECT "length" FROM "264in_6_6mm_and_up" WHERE "shoulder"='12.18 (.480)';