Toxic fumes from ammunition and air cleaning systems.

[Pengo]

Pengo - does your club allow the use of BP on an indoor range?

Yes. At least I think it's black powder. It certainly belches out enough flames and smoke to make anyone think there's a resident dragon!!!!

Although I know some use the Swiss reloading powder (at least I think that's what it's called), which is supposed to be "less harmful"!!!!!

[Turnup]

Yes. At least I think it's black powder. It certainly belches out enough flames and smoke to make anyone think there's a resident dragon!!!!

Although I know some use the Swiss reloading powder (at least I think that's what it's called), which is supposed to be "less harmful"!!!!!

It's probably Pyrodex or one of the other BP substitutes. These actually produce a lot less smoke than BP. BP is really dodgy on an indoor range. Unless it is washed down after each use the unburned powder builds up and becomes an explosion hazard - and you can't vacuum it up unless you have a really really expensive cleaner rated for explosive atmospheres. Bit concerned at your mention of Swiss though - AFAIK that is a brand of BP. Suggest that you have a discreet chat with the club committee.