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 .300 blackout powder? 
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Real Name: Thomas Brewster
What powder does everyone like best for reloading .300 blackout?


Sat Jan 05, 2019 9:39 pm
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Need a little more info, are you doing subsonic or supersonic and for a bolt gun or semi auto? If semi auto what’s your gas system length?


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Sat Jan 05, 2019 11:04 pm
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I use IMR 4227

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Sat Jan 05, 2019 11:23 pm
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dreadi wrote:
I use IMR 4227


That’s for supers?


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Sun Jan 06, 2019 7:08 am
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MyNameIs940 wrote:
dreadi wrote:
I use IMR 4227


That’s for supers?


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Yes.

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Sun Jan 06, 2019 8:01 am
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AA 1680 is a great one for subs


Sun Jan 06, 2019 8:17 am
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I’ve had good experience with lil gun for subs with 220gr bullets. Just bought some berry 220gr to try out and going to head to the range today to see how they run


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Sun Jan 06, 2019 8:58 am
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Ive used AA 5744 for subs and its worked fine. Not a huge fan of it though since its not a spherical powder so doesnt play well for mass loadings.

AA 1680 is what I mostly use now for subsonic and also the heavier supersonic loads. (147gr pulls)

AA #9 is all ive tried with lighter supersonics (110gr ish)


Sun Jan 06, 2019 10:30 am
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For supers I use H110, subs I use AA1680.


Sun Jan 06, 2019 10:51 am
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lunacite wrote:
For supers I use H110, subs I use AA1680.



:plusone:

I know people have used a lot of other powders, but for me these are the 2 that always work for the intended purpose.


Sun Jan 06, 2019 5:23 pm
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MyNameIs940 wrote:
Need a little more info, are you doing subsonic or supersonic and for a bolt gun or semi auto? If semi auto what’s your gas system length?


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I suppose I’d like to know what would work best for both. I’m reloading for an AR with carbine gas system.

The Hornady manual I have lists a lot of powders that show up in super and sub loadings. H110, lil’ gun, Alliant 2400, accurate no. 9, and imr 4227 are all listed for almost all bullet weights.


Sun Jan 06, 2019 7:01 pm
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Tombrewster421 wrote:
MyNameIs940 wrote:
Need a little more info, are you doing subsonic or supersonic and for a bolt gun or semi auto? If semi auto what’s your gas system length?


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I suppose I’d like to know what would work best for both. I’m reloading for an AR with carbine gas system.

The Hornady manual I have lists a lot of powders that show up in super and sub loadings. H110, lil’ gun, Alliant 2400, accurate no. 9, and imr 4227 are all listed for almost all bullet weights.


For subs I’d suggest aa1680 or lil gun in an ar, for a bolt gun you can use trail boss to make it extremely quiet. I don’t mess with supers at all since I just like subs in my 8” suppressed sbr.


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Sun Jan 06, 2019 7:44 pm
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