If it was a lighter grey colour then I know the stuff you mean. I've used it for a few sealing things around the shop in the dust collection system.
Do you just cut it to form short plugs and push it against the powder or do you use it as a full filler up to the back end of the bullet?
Do you just cut it to form short plugs and push it against the powder or do you use it as a full filler up to the back end of the bullet?
