Miss-Fire powder turned Yellow

[WANTASHOOT]

About 3 weeks ago I loaded up some 6dasher with 8208XBR and some Berger Column bullets. CCI BR-4 primers. Charge weight was 33grain. The 3rd round was a Mis-Fire. I was working up loads so the remaining rounds were different charge weights but they all fired as intended. Now here today I decided to pull that bullet and decap this and the rest of my brass get it cleaned and prepped for reload. Weird part is the powder was packed tight and wouldn't move. Had to push an Allen wrench in a ways and most of the powder came out but many small chunks had to be broken apart. Check out the pics and I am sure one of you fellas can explain.

 

[WANTASHOOT]

Here is the primer

 

[dickn52]

I demilled some Varget loads that were loaded about 4 years ago and it was yellow as well. The yard didn't know the difference and loved it.

 

[243winxb]

http://www.imrpowder.com/PDF/MSDS Files/Smokeless/IMR/SDS Prop BM8208.pdf

Australia ADI powder AR2210 is IMR 8208 XBR .
Has 5% * of

Ingredients determined not to be hazardous*

. Love to know what it is.

The cause could be a weak primer. Coating on the powder thats hard to light up. Powder contamination. I have seen ball powder start burning, (H450) an then just stop.

Or the secret ingredient*

http://www.adi-powders.com.au/handloaders/index.asp

 

[Homerange]

http://www.imrpowder.com/PDF/MSDS Files/Smokeless/IMR/SDS Prop BM8208.pdf

Australia ADI powder AR2210 is IMR 8208 XBR .

Where'd you get AR2210 from ?
There's no listing for it here:
http://www.adi-powders.com.au/handloaders/equivalents.asp

Only Bench Mark 8208 which is listed as the equivalent to IMR 8208 XBR. Yes they might be the same just like Varget and AR2208 are but to say so would just spark another argument.

 

[savagedasher]

If you look at the primer it is clear the anvil wasn't pushed foward. Looks like too much head space weak fireing pin spring or not enough fireing pin leingth. Larry

 

[243winxb]

Where'd you get AR2210 from ?
There's no listing for it here:
http://www.adi-powders.com.au/handloaders/equivalents.asp

Only Bench Mark 8208 which is listed as the equivalent to IMR 8208 XBR. Yes they might be the same just like Varget and AR2208 are but to say so would just spark another argument.

Fron the IMR MSDS .

Synonyms AR2210 V02, Propellant BM8208

 

[jlow]

The black stuff was burned off - that yellowish green is the normal colour of smokeless powder. The black stuff is deterrent that slows the early stages of burning. I can't understand why it went out "(

So you are saying the deterrent was burnt off the surface of the extruded powder but the powder underneath did not burn?

 

[dkhunt14]

Whenever I saw this it was weak hits from firing pin. Causes were from either primer nor seated deep enough, firing pin weak, firing pin light weight or too much heads pace. It was always CCI BR4 primers and it was because the cups are thicker and harder. The yellow powder was always the burnt stuff and it was caked back at the primer hole. Usually when this happened there was also hang fires or delayed ignition also. Matt

 

[WANTASHOOT]

Thanks for the input. I will measure the firing pin Protrusion and see what it's at, I have fired about 250 rounds thru the action hopefully the firing spring has more life than that. I was not aware the actual powder is green/yellow color. I knew there was burn rate modifier coatings on it but assumed it was still black underneath. So thanks for the lessons. I appreciate the assistance.

 

[Rsadams]

The black stuff was burned off - that yellowish green is the normal colour of smokeless powder. The black stuff is deterrent that slows the early stages of burning. I can't understand why it went out "(

I would think just the opposite. The yellow look the same as uburnt powder I get loading .38spl with win231 which is position sensitive becouse of the small charge in such a large case. I find it on the gun all the time..yellow at the bottom black or grey on top. Primer just didnt light it off like Larry said.

 

[GrocMax]

I must be yellow/grey colorblind, every ADI made Hodgdon powder I've ever stared at looks like gold/yellow to me, not graphite coated.

 

[243winxb]

Unfired color- Brown. Photo http://www.ilrc.ucf.edu/powders/sample_detail.php?powder_id=759

 

[DRNewcomb]

The Brits used to load their cannon shells with a picric acid explosive. After Jutland the compartments of the German ships where these shells exploded were colored bright yellow.

 

[GrocMax]

Brown? Closer to yellow/gold with my eyes.

Sepia?
Amber?
Beige?
Russet?
Khaki?

How bout French Fry?

 

[Scott Harris]

So, it looks like the primer went off fine and the powder did not ignite. the powder is yellow and clumped together like a rock. i ran into this problem often when wet tumbling my brass. the citric acid in most soaps will contaminate and cause the powder to clump and become inert. Since switching to dry tumbling, ive never had this problem again. how are you cleaning your cases?

ps. based on your pics you have the exact same problem. notice how only part of your powder is yellow. thats the stuff at the bottom of the case that absorbed the soap residue and created a barrier preventing ignition

 

[WANTASHOOT]

So, it looks like the primer went off fine and the powder did not ignite. the powder is yellow and clumped together like a rock. i ran into this problem often when wet tumbling my brass. the citric acid in most soaps will contaminate and cause the powder to clump and become inert. Since switching to dry tumbling, ive never had this problem again. how are you cleaning your cases?

ps. based on your pics you have the exact same problem. notice how only part of your powder is yellow. thats the stuff at the bottom of the case that absorbed the soap residue and created a barrier preventing ignition

I use Dry corncob type media in a vibratory drum.

 

[Scott Harris]

are you adding anything to the corn cobb media or on your cases???

 

[WANTASHOOT]

are you adding anything to the corn cobb media or on your cases???

Yeah some RCBS brass polish additive but I have been using it for years it never had caused problems. I didn't add any fresh on this batch.

I could have had grease/oil on fingers, or hundreds of other things not sure I will ever know unless it repeats.

 

[Acyr]

Yeah some RCBS brass polish additive but I have been using it for years it never had caused problems. I didn't add any fresh on this batch.

I could have had grease/oil on fingers, or hundreds of other things not sure I will ever know unless it repeats.

I bet it was a piece of corn cob stuck in the flash hole.