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  #1  
Old 02-23-2014, 7:02 PM
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Unhappy 300 Blackout and A1680. Lots of unburnt powder

I've been loading .300 Blackout 230gr casts with 10.3-10.7grs of A1680. I'm getting a fair amount of unburnt powder smacking me in the face.

I guess my description of unburnt powder is subjective, but its enought that i feel a slight sting on my face.

I know 1680 is a slower powder, but I've never had this problem with any other powder I've shot.

I've thought about using a magnum primer but not sure how that would play out. has anyone else had this problem with powders? solutions?

and just some gun pr0n. Me shooting my 300blk pistol in Perris.
Video link
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  #2  
Old 02-23-2014, 11:39 PM
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I only use CCI #41 which is essentially hardened small rifle magnum. I've shot some 220 sierras with IMR 4227 and they were a bit dirty but not overly excessive like your experiencing.
I loaded up some 230 LNR in my 45 with a mid level charge of tight group, crazy amounts of unburnt powder. My local NRA reloader suggested I switch to LP mag primers to clean that up.

Hope that helps a bit, nice pistol by the way.
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  #3  
Old 02-24-2014, 12:37 AM
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oh nice. I have #41's. I'll start using those and see if I get better results. Thanks for the tip!
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Old 02-24-2014, 5:00 AM
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Powder burns cleaner with added pressure.Burning powder in sub-sonic rounds tends to be on the dirty end of things.
I shoot the 300 Whisper which is essentially the same cartridge and I use Lil-gun.
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Old 02-24-2014, 1:57 PM
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put a good crimp on it as well. theoretically 230g bullets should be able to get 1680 ignited reliably.
And of course the magnum primers

Last edited by 3RDGEARGRNDRR; 02-24-2014 at 1:59 PM..
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Old 02-24-2014, 7:33 PM
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i use 11.2 gr AA1680 with that same boolit with the wolf .223 primers, with your load and magnum primers i think you would be gtg
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Old 02-24-2014, 7:35 PM
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I use 1680 with 125 grain projectiles for the absolute best load in the 300 i have found. No problems with unburnt powder yet.
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Old 02-24-2014, 9:20 PM
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I think I will try adding a little more lovin to my crimping. I think "magnum" primers are a cop-out and I'll save that as a last resort.
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Old 02-24-2014, 9:25 PM
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I'm running an 8.5" barrel with 2" linear comp so I never know how to read load data.

That said, I just tried 147gr with 16.3 of Lil Gun. Shot fine but the recoil was M1A like. Not being able to shoulder doesnt help. Seated at 2.140 also. Think I'm going to try 15.8 lil gun @ 2.200 and see what I get.
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Old 02-25-2014, 7:25 AM
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Would this help?
http://www.midwayusa.com/product/856...e#ReviewHeader
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Old 03-02-2014, 5:11 PM
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Jesus on a cracker there was so much fuzz and carbon on my bolt after firing like this. 1680 is definitely a dirty powder.
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Old 05-16-2014, 8:47 PM
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How is the H110.. I'm building a .300 just to have something different..I have too many 5.56. Was thinking of 150gr using h110.
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Old 05-16-2014, 9:40 PM
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Quote:
Originally Posted by 3006mv View Post
that makes sense, i thought I was getting smacked in the face by powder from the ejection port...which makes no sense. It didnt even occur to me that gas will leak there. cool, but I'm not going to spend 100 bucks on a charging handle.
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Old 05-16-2014, 10:43 PM
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I use H110 on my 150gr supers. No problems at all.
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Old 05-16-2014, 10:46 PM
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Quote:
Originally Posted by Breakdown View Post
How is the H110.. I'm building a .300 just to have something different..I have too many 5.56. Was thinking of 150gr using h110.
H110 is my favorite 300 whisper/AAC/Blackout powder.
Around 14-15gr with 150gr bullets is in the range.
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Old 05-17-2014, 7:36 PM
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Quote:
Originally Posted by Germz View Post
that makes sense, i thought I was getting smacked in the face by powder from the ejection port...which makes no sense. It didnt even occur to me that gas will leak there. cool, but I'm not going to spend 100 bucks on a charging handle.
exactly either would i, there are ways to diy with black rtv silicone do a google
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  #17  
Old 05-18-2014, 10:21 PM
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Quote:
Originally Posted by Germz View Post
I've been loading .300 Blackout 230gr casts with 10.3-10.7grs of A1680. I'm getting a fair amount of unburnt powder smacking me in the face.

I guess my description of unburnt powder is subjective, but its enought that i feel a slight sting on my face.

I know 1680 is a slower powder, but I've never had this problem with any other powder I've shot.

I've thought about using a magnum primer but not sure how that would play out. has anyone else had this problem with powders? solutions?

and just some gun pr0n. Me shooting my 300blk pistol in Perris.
Video link
Seems to be shooting pretty well in that video. Have you tried lighter bullets also? Any idea what velocity those rounds are at?
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  #18  
Old 05-19-2014, 9:20 PM
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I hope you can solve the unburnt power issue, I hate the extra fouling!

Here's a link to a do it yourself gas buster charging handle.
http://www.03designgroup.com/technot...harging-handle
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  #19  
Old 05-20-2014, 5:35 AM
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I use AA1680 with Hornady 208gr ballistic tips and have very little if any powder residue after firing. Have not tried cast bullets yet in 300 BLK, but know they run at lower pressure than jacketed.
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Old 05-20-2014, 5:58 AM
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Just put black rtv silicone. In the gap at the charging handle to check for leak
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