It's not a 100% though.
According to the chart my P944 was made in '99 but when I called Ruger on a seperate issue they said my gun was made in '00
The chart is still pretty cool but to be 100% you have to call Ruger.
Oh the issue I mentioned above was that I bought my gun used with no manual and I called Ruger to get a free one. My gun is too good for the one you can download at the Ruger site. No printed up copies for my P944.