I have the SA bleed off block on a Faxon 14.5” middy (.082” port per their specs vs. .072-076” for most manufacturers). So far I’m very happy with it, but admittedly my round count has been pretty low on that upper due to the ammo situation.
FWIW, I have a similar 16” BA Hansen that is advertised around .074” and it runs great with M16 BCG/H2 and AE223 ammo.