One of the mysteries of the English language finally explained.
1A barrel for storing pickled food.
2U.S.A.F. slang. A (small or precise) target. Chiefly in phrases suggesting accuracy in bombing, especially in "right in the pickle barrel" and variants.
US Military slang. Of bombing, etc.: precisely aimed; extremely accurate.
Mid 19th century. From pickle + barrel.
pickle barrel/ˈpɪkl ˌbarəl//ˈpɪkl ˌbar(ə)l/
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