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Old 05-11-2017, 04:18 PM   #1
Driswalds
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Default Sooty brass

Long story short I have been reloading pistol for years but never rifle.
I built my first AR and reloaded some rounds with AR comp for it.
Started loading 5 rounds each at 10% lower then max working up to listed max in half grain increments. The brass was very sooty at the lower pressure but was cleaner at max load. But still plenty dirty. Not having much experience with AR's or reloading rifle is that normal?

With pistol I would think not enough pressure to seal up.
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Old 05-11-2017, 04:33 PM   #2
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I don't know, as I haven't loaded any AR ammo, yet.

I wonder if it has something to do with the AR crapping where it eats? If your powder is a dirty powder (again, no experience what the one you are using) it would come back at you to cycle the bolt, leaving carbon deposits.

I'm sure there are smarter folks than me who will weigh in.
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Old 05-11-2017, 07:21 PM   #3
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What powder are you using?
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Old 05-11-2017, 08:23 PM   #4
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Allient AR-comp
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Old 05-11-2017, 08:51 PM   #5
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Does the barrel have unburnt powder in it?
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Old 05-11-2017, 09:46 PM   #6
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No unburnt powder to be seen in chamber or barrel.

I tried to upload a picture but it keeps saying I need a category and can't figure it out.
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Old 05-11-2017, 10:47 PM   #7
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Are you using magnum primers as suggested?
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Old 05-11-2017, 11:52 PM   #8
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In small cases if you reduce the powder to a point where the pressure is not capable of expanding the case properly, you will have some gas blow back, that would be the 'soot.'

I've had this occur in cases that I had to reduce the charge for lead bullets.
.30-06, .308 and .30-30 cases.

I prefer working with percentages of powder, instead of reduced 'graIns.'
Add one percent at a time to achieve your most accurate goal.

If five grains was 10% then the recommended load would have been 50 grains.

All of the above is just my take on building a load UP to find the sweet spot.
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Old 05-12-2017, 03:52 PM   #9
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Quote:
Originally Posted by 55chevy View Post
Are you using magnum primers as suggested?
Alliant's 2017 reloaders guide called for federal 205 primer and that is a non Magnum small rifle primer. I did not use federal primers but did use CCI small rifle primers as that was the only ones available.

The rifle having less then 50 rounds thru it I will take it out again with factory loads next week along with new hand loads and will see if it improves.

Thanks for all the help and will update with the results.
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Old 05-12-2017, 11:17 PM   #10
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Quote:
Originally Posted by 10 Bears View Post
In small cases if you reduce the powder to a point where the pressure is not capable of expanding the case properly, you will have some gas blow back, that would be the 'soot.'
This has also been my experience in all my yrs of reloading.
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