The P is an Uberti .357 Thunderer,and I used the ''1862 Police'' snubbie as sold by Cabelas which, as you pointed out is an 1861 Navy model,as it has six shots not five,and isn't built on a rebated 1849 frame the way a real police was.I mated it to another Thunderer grip frame and grip from VTI. This was a bit of a trick as the grip and grip frame were Uberti,and the pistol frame itself was a Pietta.I had to open up the hammer channel in the grip frame as the Pietta's hammer is larger,and the screw hole pattern was just slightly off,and the Pietta screws didn't want to fit in the Uberti grip frame holes.After carefully opening up the holes the tiny amount of ''slop'' was enough to align everything,but it was tight.Straw Hat your 1860 inspired me to post my snubbys.yeah mine has the hole for the brass ''knitting needle'' punch loading rod,but mine is missing. I use an Uberti loading stand / tool meant for loading the 1873 P percussion model they made.