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Share your 300 Blackout Loads here>
Posted: Thu Feb 24, 2011 8:15 am
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!
Re: Share your 300 Blackout Loads here>
Posted: Thu Feb 24, 2011 1:42 pm
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
Re: Share your 300 Blackout Loads here>
Posted: Thu Feb 24, 2011 2:26 pm
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.)
Re: Share your 300 Blackout Loads here>
Posted: Thu Feb 24, 2011 5:10 pm
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.
Re: Share your 300 Blackout Loads here>
Posted: Thu Feb 24, 2011 8:10 pm
by libertyman777
Cool guys. Keep'em coming.
Re: Share your 300 Blackout Loads here>
Posted: Thu Feb 24, 2011 8:17 pm
by robpiat
Tried in both a 10" AR and a 16" Bolt gun
9.5 IMR 4227
208 Amax
1000-1080 FPS
Re: Share your 300 Blackout Loads here>
Posted: Fri Feb 25, 2011 3:24 pm
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..
Re: Share your 300 Blackout Loads here>
Posted: Fri Feb 25, 2011 8:39 pm
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?
Re: Share your 300 Blackout Loads here>
Posted: Sun Feb 27, 2011 1:23 pm
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.
Re: Share your 300 Blackout Loads here>
Posted: Sun Feb 27, 2011 2:37 pm
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!