Regarding the Swiss powder bottles anti-static or not, I took the liberty to contact the company, I like to get the facts directly from the horses mouth, so here is the answer:

Thank you for the interest and the faithfulness towards our Swiss Black Powder.
 
We can confirm we are using anti-static material, with high electric conductivity for our bottles.
 
The material has been tested by the supplier and we have the relevant certificates attesting the properties of this material.
 
We wish you a good shooting season.
 
With our best regards,
 
POUDRERIE D'AUBONNE SA
Claude MODOUX, Director

Michael