human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Name, Case type, Bullet diameter, Neck diameter, Base diameter, Rim diameter, Case length, Cartridge length
###Question: Which Case type has a Cartridge length of 64.77 (2.550)?
gpt
SELECT Case type FROM table WHERE Cartridge length = 64.77 (2.550)