Prove it
Hornady says as low as 4.7g
Nosler says as low as 5.1g
Sierra says as low as 5.0g
RCBS says as low as 5.2g
Hercules said as low as 5.0g; Alliant says 5.5g MAXIMUM
Speer says (in #13) as low as 5.6g
Lyman says as low as 4.5g for lead, 4.4g for jacketed
Perhaps fewer blanket statements, or more knowledge, or something, ay?