Home Forums Hunting & Shooting Ask The Gunwriters Vihtavuori powder corroding brass cases

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Like a hunting buddy once told another guy who was proudly using his YETI koozie, “if you need a koozie, you ain’t drinking your beer fast enough”. Happy Trails

Probably had your finger on the trigger.

Teach you to not pick your nose when doing reloading.

Awww heck....

Now you tell me...

DF

Looks exactly like every picture that I've seen of cartridges that had decomposing powder in them. The decomposition products eat brass cases and bullet jackets.

So, after reading this thread, I went home an looked at some .222 Rem I had loaded in Lapua cases with VV133. Sure enough, the cases were corroded at the case mouth. I took a pic, but not sure how to upload it.

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After you get the Image Gallery posted. Open the gallery and image. Right click on the image with your mouse, and select "copy image location".

And paste the image location in between the image tags => [img] pasted image location here [/img] in a new post to this thread.

J[quote][/quote]Not so easy from from an iPad. This is a work around. Can’t get the pic to post.

https://www.24hourcampfire.com/ubbthreads/ubbthreads.php/galleries/14296838/vv133-corrosion

https://www.24hourcampfire.com/ubbthreads/gallery/80/full/113072.jpeg

BRISTECD's pic of Vihtavuori corroded bullets:

So how can I post pics like that from an iPad?

I've never used an iPad. A quick search online says hold your finger on the image and select the copy option. Not sure if that copies the image or its location. Perhaps it will provide a menu of options you can select.

http://forums.thecmp.org/showthread.php?t=157820

The above link is a discussion about deteriorating powder.

Lots of good info in that link.

Thanks.

DF

The latest from Vv/Lapua. Bullets are swaged and coated, no raw lead or typical cast bullet lube exposure to the powder. We live in a humid area, but central heat and air pulls a lot of moisture out of the room. Not real humid inside with the unit running 24-7. I guess the first response is from a HQ person named "Janne", the second response from the USA Capstone rep.

Robert,
Here is the feedback It from both LAPUA and VIHTAVOURI contacts:
Hard to say reason, but I think that this could be result of corrosion process started inside case due to some foreign material (moisture or something similar). Is it so that during loading process some foreign material have got inside case. I think powder alone will not do that. .45-70 case have such thin walls that corrosion eats through is quite fast.
And,
Sorry for my late answer; I think Janne could be right about the moisture issue.
The powder doesn’t change things that fast (six to eight years), yet I’ve seen a bunch of the “blueish/greyish” lead bullets, and sometimes even cases, kind of your pictures attached.
Humidity with impurities is probably the most common reason for this kind of results.
Since 2016, Vihtavuori has added some chemical agents to prevent case corrosion from happening. So this may have been caused by the humidity of the area you live in . Were these cartridge cases stored "bullet down" in the plastic cases?

Rounds were stored, bullet down in plastic cases. Not sure if they think that's good or bad...

Another point, if corrosion isn't a problem, why are they working to add "some chemical agents to prevent case corrosion from happening"...?

That's about as close to an acknowledgement as ya gonna get, IMO.

DF


Edited to add photo.

I agree. Sounds like....

Duck.... bob & weave.


Jerry

They sound like politicians.

DF

If in 2016 they started adding chemical agents to prevent case corrosion, this powder was for sure pre-2016 vintage. Maybe the newer versions aren’t as bad.

DF

Gregor, thanks for the link. Has me, thinking/questioning about powder shelf life and powder storage.

Amazing how some of the older ones, like vintage 4831, last so well, much newer Vv powders not so much.

60+ yr old H-4831 shooting well, 10 yr old Vv n-133 going bad. Must have to do with chemical composition. Maybe later Vv powders have been improved and are better. Let’s hope so.

DF

Yes it is.. I have at least 9 + lbs of Surplus 4831 --> NO problems. No brown residue. No acrid smell.
Velocity on PAR for 284 Win & 7mm R M.


Jerry