CREATE TABLE table_name_99 (max_pressure VARCHAR, muzzle_energy VARCHAR)

What is the max pressure for the 468ft lbf (634 j) muzzle energy?
SELECT max_pressure FROM table_name_99 WHERE muzzle_energy = "468ft•lbf (634 j)"
SELECT "max_pressure" FROM "table_name_99" WHERE "468ft•lbf (634 j)" = "muzzle_energy"