What is the shoulder measurement of the gun with a length of 57.85 (2.278)?
CREATE TABLE "264in_6_6mm_and_up" (
  "name" text,
  "bullet" text,
  "length" text,
  "base" text,
  "shoulder" text,
  "neck" text
);
SELECT "shoulder" FROM "264in_6_6mm_and_up" WHERE "length"='57.85 (2.278)';