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Posted: 2/19/2017 3:12:13 PM EDT
Have a 300 blk supressed sbr with strange debris in the receiver after shooting. Looks like brass but dont think it is. Trying to figure out why this is happening, didnt notice till i got home, so have not inspected fired brass. Has any one seen this before?
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Posted: 2/19/2017 4:42:21 PM EDT
[#1]
It's either un-burned powder or some filler material added to the powder, often found in factory blackout subsonic loads.
http://www.ar15.com/forums/t_3_4/702663_Is_this_Unburnt_Powder_in_My_Receiver__New_Build_Question.html |
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Posted: 3/5/2017 9:49:15 PM EDT
[#2]
pistol gas I am assuming, as opposed to carbine gas system?
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Posted: 3/5/2017 9:56:27 PM EDT
[#3]
Are you shooting Gemtech .300 blk rounds? because that's the only ones iv come across that leave that in my receiver.
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Posted: 3/5/2017 9:56:55 PM EDT
[#4]
It looks like pollen. Were you shooting on the ground near some flowers?
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Posted: 3/8/2017 1:31:12 AM EDT
[#5]
It is unburned or partially burned powder. Plenty of people have experienced the same with 300BO. I have experienced it while reloading pistol and rifle rounds. It seems to occur at the low end of powder charges. The same powder will not do it when the charge is bumped up.
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Posted: 3/8/2017 1:34:47 AM EDT
[#6]
Yeah looks like shit gunpowder like the stuff they used in the Gemtech rounds.
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Posted: 3/8/2017 1:35:53 AM EDT
[#7]
Quote HistoryQuoted:
Yeah looks like shit gunpowder like the stuff they used in the Gemtech rounds. And GI 9mm using PB propellant. |
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Posted: 3/8/2017 1:48:20 AM EDT
[#8]
2 possibilities-
Brass shavings from the extractor. Filler/Buffer material used by some ammo manufacturers to balance the case volume. I have seen it in 9mm cheap plinking ammo as well... |
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