Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_20466 ( "Cartridge" text, "Bullet weight" text, "Muzzle velocity" text, "Muzzle energy" text, "Source" text )

### Question ###
When using a .375 Remington Ultra Magnum, what is the muzzle velocity?

### Accurate SQL ###

SELECT "Muzzle velocity" FROM table_20466 WHERE "Cartridge" = '.375 Remington Ultra Magnum'