Firing pin, is this normal?

[Eagl1]

Greetings, I'm new to the forum. I have a few old S&W revolvers but my question is about the model 15-3 that I just bought. The firing pin is loose to the touch. More spacificaly, the tip of the firing pin will rotate up and down about a quarter of an inch on the roll pin, like the hands on a clock.
I have not shot it yet and this is the only gun I have with this type of hammer so I don't have anything to compare it to. Is this normal? If not, what do I need to do? Thanks.

 

[duckloads]

Both of my M15-4's and a M686-1 each have a full 1/8" up and down movement. Funny thing, the 686 fring pin seems to have a lite spring keeping the fring pin rotated in the downward position.

 

[Eagl1]

measurment

I just checked it with a rule and the movement is right at an eight inch. I've been told that I tend to exaggerate allot.

 

[Dick Nissen]

Yes, This is normal.

 

[Texas Star]

Some are spring-loaded, some not. Varies with the time of production.

T-Star

 

[s&wchad]

Some are spring-loaded, some not. Varies with the time of production.

T-Star

It also seems to vary by model. If you tighten the rivet so the hammer nose won't move, the gun won't function. The hammer swings an arc and the tip of the pin needs to pivot to pass thru the bushing.