Share your 300 Blackout Loads here>

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libertyman777
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Share your 300 Blackout Loads here>

Post by libertyman777 »

Lot's of folks starting to load for this round. How about let's share some load data with the understanding that a given load is only safe in a particular rifle and that supersonic loads should be worked up and subsonic loads should be worked down.

Thanks!
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pierre1631
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Re: Share your 300 Blackout Loads here>

Post by pierre1631 »

9" AAC upper
762-SD
221 Fireball necked to .30
220 Gr Sierra MatchKing
10.5 gr A1680
Remington 7 1/2 small rifle primer
HK416 lower

Works great with the suppressor- will not move the action without. Video doesn't show- but works like a champ in full auto!
http://www.youtube.com/watch?v=TzmFEMbArnU&hd=1
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TonyT
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Re: Share your 300 Blackout Loads here>

Post by TonyT »

147 grain (my measurement) .308 tracer.
14.0-14.5 gr H110 (both function in my 9" AAC upper)
2.09 oal
Shot 3-400 rds so far, works well, makes for a nice light show. (~50 percent trace, but they are old.)
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82nd airborne
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Re: Share your 300 Blackout Loads here>

Post by 82nd airborne »

For bolt guns, I like 5.6g of Unique below a 220 for a 16" barrel. It is nice and quiet, actually really really quiet, you will have to bump it up a tit bit for longer barrels.
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libertyman777
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Re: Share your 300 Blackout Loads here>

Post by libertyman777 »

Cool guys. Keep'em coming.
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robpiat
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Re: Share your 300 Blackout Loads here>

Post by robpiat »

Tried in both a 10" AR and a 16" Bolt gun

9.5 IMR 4227
208 Amax

1000-1080 FPS
imyomama
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Re: Share your 300 Blackout Loads here>

Post by imyomama »

10 grains of 4198 on 9" upper suppressed .. right at 1050 fps ..
18gr of h110 .. same upper .. 125 sierra spitzer around 2050 fps..
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wildfowler
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Re: Share your 300 Blackout Loads here>

Post by wildfowler »

82nd airborne wrote:For bolt guns, I like 5.6g of Unique below a 220 for a 16" barrel. It is nice and quiet, actually really really quiet, you will have to bump it up a tit bit for longer barrels.
I was wondering if a person could do something like this in an Encore/bolt. A smaller charge of a pistol powder. I'm thinking this would be a more quiet combo?
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TonyT
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Re: Share your 300 Blackout Loads here>

Post by TonyT »

I have noticed with quick load that due to the small case capacity, bullet length and seating depth can have dramatic changes in pressure, so be careful! I have also noticed that on full auto, when my tracer loads go to above 14.5 gr and above, I start getting jams where an empty is in the upper, unejected , but not held by the extractor ( bolt velocity too high?) this is with an h2 buffer.
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82nd airborne
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Re: Share your 300 Blackout Loads here>

Post by 82nd airborne »

imyomama wrote:10 grains of 4198 on 9" upper suppressed .. right at 1050 fps ..
18gr of h110 .. same upper .. 125 sierra spitzer around 2050 fps..
You forgot to mention that it cycles an ar carbine length or short barrel with the same gas port as used for supers! Oh yea, and it is cleaner than 1680!
Regards,
Aaron Fouraker
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Delta Company Arms, LLC
(918) 332-6503
[email protected]
www.deltacompanyarms.com
IN GOD WE TRUST.
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