What is the name of the gun with a shoulder that measures 10.688 (.420)?
CREATE TABLE "264in_6_6mm_and_up" (
  "name" text,
  "bullet" text,
  "length" text,
  "base" text,
  "shoulder" text,
  "neck" text
);
SELECT "name" FROM "264in_6_6mm_and_up" WHERE "shoulder"='10.688 (.420)';