In the eighties bp had to be stored in a wooden lined metal box. I used an old ammo box lined with thin ply. Someone then twigged that’s a metal box full of gunpowder was not a good idea. The same feo who was mouthing off about nc powder also insists that my bp boxes have anti tamper screws to prevent anyone from nicking the powder. I pointed out that a, Ive never seen a fire use a screwdriver and b, it’s a wooden box-a hammer will open it! But, no anti tamper screws then no licence. It’s pointless trying to argue with someone like that.