user: Question: Which length has a Bullet of 6.5 (.257)?
Columns: ['Name', 'Bullet', 'Length', 'Base', 'Shoulder', 'Neck']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['.25-20 Winchester', '6.55 (.258)', '33.78 (1.33)', '8.86 (.349)', '8.46 (.333)', '6.96 (.274)']
SQL:

assistant: SELECT "Length" FROM "Table" WHERE "Bullet" = '6.5 (.257)';