[Malone LaVeigh]

Because the test firing of the weapons is voluntary, Brown said there isn't any constitutional violations involved.

The other 15 or so gun owners who did not show up will be checked by the OSBI to see why they didn't volunteer for the test firings.

So does their lack of cooperation constitute probable cause towards obtaining a search warrant to seize the guns in question?

[misterrob]

So does their lack of cooperation constitute probable cause towards obtaining a search warrant to seize the guns in question?

No.