Actually, Horandy swaged lead bullet are 95/5 to 94/6 alloy and NOT that soft--certainly not for any TiteGroup velocities.
TiteGroup throws out pressure spikes. The MAX load is probably the highest load that did not have pressure spikes that exceeded SAAMI pressure limits. Now that we have pressure vs. time traces and can SEE any spikes, a LOT of load data has been reduced.
Clays also throws pressure spikes at times and you might find it having a rather low max for the same reason.
Next, TiteGroup does not always "play nice" with lead bullets. It burns very hot and at least one coated bullet manufacturer warns users NOT to use TiteGroup and save themselves problems.
Call Hodgdon and ask.
I shoot 140gn Hornady swaged .358" "cowboy" bullets in HOT .38 Super loads (PF 175+) and get no leading. Bullets are plenty hard enough.