I took a look at a could of my No4 AOL readings,
Using BSE Mk7 bullets
Lee Metford 3.371
No4 Longbranch 3.375
N4 (T) Savage (Fulton regulated) 3.175

Using Hornady RN .312
No4 Longbranch 3.150
N4 (T) Savage (Fulton regulated) 2.949