Had my fairly new Talo PC 642 at the range yesterday.

Fine shooter.

Nearing 600 rounds through it.

Noticed it was hard to close the cylinder fully or reopen it.

Looked down on the bench to find the locking bolt, spring and pin laying on the shooting bench.

I can only assume that the pin was in the process of falling out, leading to the roughness--and then the entire spring and bolt fell out when the pin made it all the way.

I can likely reassemble the gun--but is it unusual for this pin to loosen and fall out?

Should I use a bit of loctite on the pin?

Or should I just call S&W and have them handle this problem?

Thanks in advance.