Bill
Enjoy the grandchildren.
Just went to the Sparks website to look at a picture of the PCH. Nice pocket holster. My guess though is that with a R9, if it would fit in the back pocket the gun butt would stick up too high. On the RJ the end of the barrel is almost right at the holster bottom leaving it more possible for the gun to be hidden. This model of the RJ front pocket works very well in the back pocket. Just came back home after carrying it this way for several hours and it felt great and doesn't print itself.
Don't know if RJ ever suggests using the model RB-F/S in the back pocket since he makes a backpocket R9 model, but it works great.
Dave