scotts33 MTB-X yes. I went off the MGS ball report and believe they hit it spot on.
Sorry to hear your initial report on the Cally irons. I find the same and play better with 95g steel better than lighter graphite.
They are also very popular and getting difficult to find. The yellow MTB-X are out everywhere. Any reports on their two piece ball the Get Sum?
A bit disappointed in the Callys and would have like to have tried them with the FST shafts but a bit too expensive to have that not work out either. Going to reshaft the Adrenalines with FST 115 Sr. flex today and try them Monday. It's funny how I keep gravitating back to my oldest two sets of irons, the Acers and the Adrenalines.