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Question for the Pros #7312760 10/13/18 01:43 AM
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Dink Dodger Online Content OP
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Three on the left are factory Hornady ammo. Three on the right are hand loads with virgin Winchester brass. I fired about 30 rounds of the Winchester with different charge weights and all of them look the same. 16 rounds of factory ammo were all clean.
Any idea of what would cause the carbon around the necks of the Winchester loads?
250 Savage, 100gr Sierra GK, H380 powder if that matters.


Re: Question for the Pros [Re: Dink Dodger] #7312795 10/13/18 02:22 AM
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Carbon on the necks is going to be related to the powder, primer, burn rate and the pressure curve they create. I usually see it when I am developing loads and using a slower burning powder while I’m trying to maximize load density.

I was seeing a lot of smoked necks when I was developing a load for a .338 Edge using Retumbo. I ended up getting the load density, velocity and accuracy I was looking for with H1000 and the carbon on the necks cleared up at the same time with the faster powder.
I even saw carbon deposits on the necks of my .243 when I tried experimented with RL22. When I went back to H4831 I saw no more smoked necks.

If the load you worked up is what you’re looking for with velocity and accuracy the carbon isn’t that big a deal. You will have to spend a little extra time cleaning the chamber but it shouldn’t be a deal breaker.

Re: Question for the Pros [Re: Dink Dodger] #7312811 10/13/18 02:39 AM
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Thanks Ritter. None of the loads worked very well. 36.1gr was slightly better than the factory ammo but not great so I was already going to look at different powders. I also think I'm going to go to a 90gr Sierra so I guess I'll just have to punt on these loads.

Re: Question for the Pros [Re: Dink Dodger] #7312900 10/13/18 10:41 AM
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Like Ritter said, make sure you clean your chamber really good. That can have a big impact on accuracy.

Re: Question for the Pros [Re: Dink Dodger] #7313007 10/13/18 01:53 PM
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I agree with Ritter, it's probably a result of primer/powder combo...but I assume one is Hornady brass and one is Win, check neck thickness on both. There maybe a difference there that you have more neck clearance on the Win than you do the other. If that is the case you'd be getting what I call some blow by...if that was the case I would expect to see more carbon on the neck though.


Originally Posted by Phil Robertson
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Re: Question for the Pros [Re: Dink Dodger] #7313345 10/13/18 08:30 PM
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Ritter and Judd have it pegged and will throw in one more possibility though slim hard brass can also cause it by not expanding as quickly to seql off the neck


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