11.5 Mid-Length bros, H2 or H3?

Howdy guys. For those of you running 11.5 barrels with mid length gas systems, what buffer weight are you running?

Particularly interested in hearing from those running traditional high back pressure baffle cans.

The 'tism in my brain wants to run as little buffer weight as necessary, so if y'all are having success with H2s I'll copy you