Can someone tell me if the recoil spring on the 9mm Mil Pro is less (easier to rack the slide) than the first gen Millennium? I have a wife who is interested in 9mm, but she is having a hard time racking the slide on our son's Millennium.
There isn't enough difference between the two models as far as spring tension goes. One of the unwritten rules is, the smaller the gun, the harder to wrack the slide because of the spring. That's not set in stone, but applies to a lot of handguns.
The Taurus PT138 or PT132 might be easier because of the smaller amount of inertia that needs to be overcome because of cartridge power and size.
These would also give a decent level of protection and are in .380ACP and .32ACP guise respectively. Less recoil and faster recovery time between shots.
While these are not the most powerful cartridges sometimes a compromise in this area is needed.
Otherwise another compromise would be for her to go to a Taurus 731 in .32 H&R magnum or a Ruger SP101 in that guise.
Ruger SP101s in that caliber are no longer made, but used ones at auction houses or local gunshops can be had. Rugers hold 6 shots of .32 H&R.
Kahr K9s or S&W 908 pistols come to mind as well. These are larger than the PT111, but would be slightly easier to charge in theory when needed, but are in the 9mm. caliber that has been arrived at as being needed.