Yeah, but ... no. I'm gonna go with what Mike Heffron (of Heffron Precision) says. It was also discussed a while back on the Colt Forum.
https://www.coltforum.com/threads/2020-python-does-not-have-mim-parts.403733/
So, according to Heffron,
"the new Python is not made of “MIM” parts. It is made from forged and milled 17-4PH stainless steel. There are only three parts that are not cut or forged, but it is misleading to call them “MIM”. Pratt & Whitney makes these parts for Colt using the same process it uses to make its hollow turbofan military jet engines, a classified process. The parts are the transfer bar, the rebound lever and the cylinder locking bolt. These parts are hard “all the way through” and therefore do not wear differently when cut or polished. These parts also “shred” diamond files."
Here's what Heffron said in his blog:
The New Series Python addressed these issues by redesigning a few parts that simply would not improve with new steel or girth ... All of the other parts have added girth and improved metallurgy. The design between the old and the new is very similar, but with 3 areas of MAJOR redesign: Cylinder locking bolt-the old one was kind of a carry over from the SAA days. Cylinder ratchet-the old one did not completely enclose the cylinder locking pin. It only made contact at 6 points around the pin, plus the ratchet/ejector was threaded and peened to the ratchet stem. The new version completely encloses the locking pin. Also, ratchet stem/ratchet/ejector are a single machined piece. Lastly, the old version used a hammer block that upon trigger reset cammed the hammer rearward then a "hammer blocking device" would slide between the hammer and the frame preventing ignition if the gun was dropped. This required quite a few parts. More parts = more trouble. The new version uses a simple transfer bar. Far fewer parts.
Between the frame being thicker in a few areas, heavier internal parts, better designed key parts, and new metallurgy, the new version is substantially stronger. Some stuff may not appear that much more "beefy", but remember:
The New Series Python is using steel with tensile strength nearly 2X greater than the Old Series Python. Additionally, when dealing with girth alone, it only takes a 50% increase of mass to double the strength. Between girth, addressing the highly problematic areas, and the new alloy steel? OOOOF!!!!
... The New Series? Where does it fit in? It is a testimonial of double-action revolver execution. Lessons learned that made the old revolver vulnerable led to some redesign. Lessons learned which made the Python the most accurate 357 Magnum revolver in the world were carried forward into the new configuration. To these lessons unpresidented [sic] tolerances have been applied.
Compared to any 20th Century double-action revolver, the old Python included, and compared to any double-action revolver produced today, the New Series Python exhibits the tightest specifications and tolerances where it counts. Chambers, throats, chamber spacing, cylinder alignment, headspace, b/c gap, bore specs. The New Series Python runs with it. This is because cutting-edge aerospace grade CNC machines (which are properly applied) make the parts (all of the same can be said of the New Anaconda as well-at their price points, the Cobra and King Cobra as well!) ...