Theoretical advantage of A5 buffer system?

[Disciple]

Don't suppose you know what would be the ideal flavor of A5 (has to be H0 or H1...cause anything heavier won't work) for an upper that won't run anything heavier than an H1 carbine and milspec carbine spring?

It's not that simple! I'm still trying to wrap my head around this observation.

When using the LMT e-carrier, Vltor A5 system, tubbs flat wire AR10 spring, and an SLR gas block, using several verified 5.56 NATO chambers, A5H0 buffer did not permit a smaller gas block "port" adjustment than the A5H4 buffer. In fact, on my suppressed 11.5" Sionics RGP and BRT 16" OPTIMUM intermediate gas barrel with the above setup the A5H4 permitted a smaller gas port setting on the gas block than the A5H0 or any of the other buffer weights (I tried all of them on all of my uppers, suppressed and unsuppressed). Yes, you read that right.

The A5H4 permitted me to run less gas than the A5H0.

I appreciate the few posts above showing lots of experimentation, but there is more going on here. Period.