On the one hand, there's
my recently made point that
guns within scary lunging distance during a traffic stop
are probably under direct control.
But I recall that somewhere in here is an NESer's anecdote
that a cop told them they wouldn't hassle them over storage,
since the gun spotted sitting out
was on the
same floor of their (kidless?) house.
They said if the gun was laying around on a different floor,
they'd consider it unsecured.
I suppose if the gun was concealed on the same floor,
that might also be "unsecured".
The implication would be something along the lines of,
if you were doing some gunsmithing or dry firing practice,
left the gun on the table to go to the bathroom,
and then the cop rang the doorbell,
they weren't going to hold it against you.
However in order to skate, you'd have to have
that cop in your house
(or one of his colleagues, if it was a department policy),
and you'd have to not have done something to enrage them
and want to jack you up.
I just did a modest set of searches that should have uncovered the anecdote,
but couldn't find it. Maybe if you read some of the many, many existing
threads on this subject you'll find it.