Another non standard question....

[Afy]

Shooting yesterday, I noticed that the person shooting next to me; left quite a bit of residue that looked pretty much like unburnt powder.
Not sure what signifies other than a load that is not burining all the powder, which couldnt be good..

not sure what caliber...but would suspect .44 since it was a lever gun. Cartridge looked bigger than a .357 but definetely not a rimmed 30-30. Too small.

I didnt get a chance to speak to him, since he didnt seem interested in talking.

 

[Wiljen]

I've seen 5744 and some of the stick powders do that. I cleaned a barrel out into a small container when shooting 5744 and attempted to light the "unburnt" stuff to no avail. I suspect it is a matter of incomplete burn rather than truly unburnt.

 

[Walkalong]

Yep. SR 4759 will do the same thing if the pressure is not up enough.

 

[ADKWOODSMAN]

2400 will also leave some unburnt.

 

[ilbob]

I used to shoot unique in 38 special. It left a fair amount of residue. Its why I switched over to bullseye.

 

[rcmodel]

All handgun ammo leaves some unburned powder to some extent.

The Glock factory range had a flash fire in 2003 that badly burned three employees due to unburned powder flakes accumulating on the test range floor.

http://query.nytimes.com/gst/fullpage.html?res=950CE3D6173CF936A25754C0A9659C8B63

rcmodel

 

[The Bushmaster]

2400 tends to leave what looks like knat's eggs rather then unburned powder...At least it does to me at lower powder charges anyway.