Nice stump Dave. I'd suggest you'll work a lot less and be more effective if you dump that tear drop hammer and make/buy a 'Winsett Hammer" (baseball bat hammer) or shaping hammer from Hoosier Profiles or Imperial or ?? IMO you need more weight to put the metal into it's plastic state.
Here is a thread on making one:
https://www.allmetalshaping.com/show...ght=bat+hammer The only thing I'll add is to put the handle at the balance point, not the middle. That way you can easily spin it from one end to the other.
I do the majority of my shaping with a Bat Hammer.