T1mpani,
The original state would have been HI's selection of leaf springs, mostly 5160 from the scrap. I believe even from the ancient times leaf springs much like the railroad tracks are the EXCELLENT choice of steel being tempered with countless cycles of expansion and shrinkage over the years of abuse. I might be wrong as the older steels would have much pure contents than say the quality of steel now. I can't say much about CPM because it's a totally different way to produce cleaner particles of steel. A peace of mind.
There were a few incidents when the indestructible khuk broke by the cho and they found that bad HT was the cause (Pre- Dashain festivals made the Kamis go wee-wee)
If i remember this well, Ryan Johnson, M.S from RMJ Tacticals mentioned about his 4,100 pound air hammer drop forged Shrike being tougher than his stock removal signature Talon and Kestrel.
So why didn't he make the Talon & Kestrel by forging? Possible but then we as customers will have to buy 1000+ hawks from him to justify the cost of the forge machine. So why only the Shrike model gets the forging and not the rest? The shape and grinding made it possible and Talon/Kestrel is the older product that worked fine ever since they changed from 1095 to 4104 Chrome -Moly. I believe Ryan would think to forge everything in RMJ will result in a greater delays already in his production.
I do hope he will forge the upcoming SPAX axe, only if enough demand to convince him that the spending is worth.