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Slow Powder New Brass= Black Crap??

 
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  #1  
Old 08-11-2009, 04:43 AM
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Slow Powder New Brass= Black Crap??

Shot some retumbo and h1000 in my .257wyb Rem sps ss 26in bbl with new brass and 115gr hunting vld's and this is what thay came out like.



I think i now what is going on hear but would like to hear what you think.

If you are wondering how thay shot lets say best group's ever.

100yrds 3 shots H1000


100yrds 3 shots Retumbo
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Old 08-11-2009, 04:50 AM
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Re: Slow Powder New Brass= Black Crap??

I'd say not enough pressure. Did you run them over a chronograph? How much neck tension did you have?

AJ
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Old 08-11-2009, 05:11 AM
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Re: Slow Powder New Brass= Black Crap??

That is what i thought.

69gr of H1000 3108-3100-3008fps
berger lists 69gr's as max with a velocity of 3277fps

67gr of Retumbo 2943-2879-2879fps
the bold was hard to lift on the last one all though i thank it was from the black stuf so i did not shoot the rest of the retumbo.

I ran them through the redding neck die.
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Old 08-11-2009, 05:26 AM
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Re: Slow Powder New Brass= Black Crap??

Yeah, every time I've seen soot on the brass it was from too light of loads. Sometimes you can get away with light loads if you have serious neck tension (helps build the pressure), or even good bullet to land contact.

AJ
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Old 08-11-2009, 10:25 AM
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Re: Slow Powder New Brass= Black Crap??

When you're working up a load and the lighter loads soot the brass, (as shown above) they also soot the chamber. Then you need to clean the soot out of the chamber/neck area before proceeding.
The soot marks that are on the brass are also on the chamber and prevent a good seal when the brass/neck swells.

My 2cents anyway.
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Old 08-11-2009, 10:42 AM
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Re: Slow Powder New Brass= Black Crap??

Low pressure, black neck seems ok for group. But, not getting the the brass to expand nuff to blacken brass down to base?
Stop where your at and head to your local smith with rifle and dies and have them mic'd!
Why one may ask?
Blow back right into face for one!
Plus the usual suspects...undersized dies....oversize chamber and or terrible reload info?
Be safe,
WT
PS: JMO
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Old 08-11-2009, 11:23 AM
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Re: Slow Powder New Brass= Black Crap??

I have shot some 100gr nbt's with rl22 and new brass thay had just a little black soot on the neck.

I will try them both again but use formed brass.

I am not sure why velocity is so much slower could it be because there coal was at 3.25 and i loaded mine to 3.45? I now every rifle is different.
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