powder stain on case

[RockyMtnDan]

I'm have been using Universal to reload my 45s for the last 1.5 years and recently changed to Bullseye. I was firing my load development rounds and noticed that all of them had a powder stain on the outside of the shell, especially those at the lower loads. This is something I never noticed with the Universal powder. Is it an indication of a problem or just a characteristic of the Bullseye powder? Any ideas?

 

[dacaur]

Lower power loads dont completly seal the case to the chamber, at least, thats what everyone says, I guess it kinda makes sense.... I do know that ALL my 9mm unique loads do that, but I dont ever load hot....

 

[moxie]

It's normal. Press on.

 

[Unclenick]

Yep. Normal with very low pressure loads. As mentioned, the case then fails to expand as firmly against the chamber, so there's a partial gas leak around the mouth. The Bullseye is dirtier burning than Universal, too, so you get more discoloration even at the same pressure.

 

[RockyMtnDan]

Thanks for the help! These loads for IDPA competition so they are lighter than what I have been using the the replies make sense. I will press on.

 

[Kayser]

100% of my 45 acp rounds loaded with Unique do this. 230 gr FMJ on top of 5.4 gr.

 

[osageid]

Nice info, that is why I love this forum! I read more than I post for a good reason!


Sent from my iPad using Tapatalk HD

 

[Clone]

So should the charge be increased to combat this or is it fine as is?

 

[dacaur]

If the gun shoots well, dont worry about it. Sometimes increasing the charge a bit will increase accuracy, but if you are happy with what you got, a little soot doesnt hurt a thing....

 

[Uncle Buck]

I have the same thing happen with my .357 Mag and .38 Spec. cases. I can stop it from happening with a little hotter load, but I like what I have and a little bit of time in the tumbler takes the powder marks off.

If you like what you have, I would call it good and not be concerned.