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Post by guncollector on Mar 4, 2012 16:52:10 GMT -8
I have recently taken an interest in this cartridge. I have been reading a lot on the ACC website. Acc states that, with proper ammo selection, all 4 modes (subsonic suppressed, subsonic unsuppressed, supersonic suppressed and supersonic unsuppressed) will work without a switchable or adjustable gas block. In fact, that was one of their design goals. I have read other places that a switchable gas block, like the Noveski block, is required. So what is the truth here? Also, will the 8 twist work with supersonic loads. ACC says it will but I am looking for unbiased information. Thanks.
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Post by pokechoke on Mar 5, 2012 8:56:39 GMT -8
I would like to know as well. Looking at a 16" 300 build.
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Post by domino on Jun 4, 2012 17:07:03 GMT -8
I am also looking into building a 300 and have the same question. Being I have a 308, I was thinking I could reload with150, 168 and 175 grain bullet if I were to run out of the lighter ammo/bullets. I was thinking a 1:8 twist would be best for my purpose; 110-175 grain loads. I'm unsure iffin the 1:8 is a better choice than the 1:11, but I would think so. I can't shoot supressed here in CA, so I'm not to worried about that. My other concern is gas port location. Would love to get a 16" mid length, but didn't want any problems with cycling. I don't think there would be but unsure  |
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Post by Brandon Sneed on Jun 4, 2012 17:50:08 GMT -8
I am currently working the details out on these questions. However the short answer is "supposed to".... This means if all variables were held constant the bhw barrel will act the same manner as the AAC versions which are 7 twist now (for more subsonic) and all other manuf are still 8 twist. BHW is 8.5 twist.
For gas, carbine is fine. Mid will create cycle issues with most ammo choices. Having shot mine, the carbine is literally no recoil impulse, similar to a 204.
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Post by domino on Jun 6, 2012 23:04:17 GMT -8
Brandon, thanks for the input. That clears up my biggest concerns. Carbine gas port it is.
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zj762
Junior Member
Posts: 40
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Post by zj762 on Dec 11, 2012 4:58:59 GMT -8
I am also looking into building a 300 and have the same question. Being I have a 308, I was thinking I could reload with150, 168 and 175 grain bullet if I were to run out of the lighter ammo/bullets. I was thinking a 1:8 twist would be best for my purpose; 110-175 grain loads. I'm unsure iffin the 1:8 is a better choice than the 1:11, but I would think so. I can't shoot supressed here in CA, so I'm not to worried about that. My other concern is gas port location. Would love to get a 16" mid length, but didn't want any problems with cycling. I don't think there would be but unsure The only reason you'd go 1:11 in a blackout is if you only wanna shoot supers exclusively. It will not stabilize the subs. -Zach |
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Deleted
Deleted Member
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Post by Deleted on Dec 11, 2012 11:39:29 GMT -8
Mi experience is that is extremely picky but nobody selling them is going to tell you this but you will find out the hard way.
The best thing is if you want subsonic have one customized for the desired application that is what the blackout does best. But for the subsonic and supersonic you will need not just an adjustable gas block but a regulator or a second port stacked with the first one so you can choose. This is the only way to make it 100% reliable in any mode. This doesn't mean that one system with 3 position adjustment might not work with a couple specific loads but once you step out of those parameters all sort of problems present themselves.
So mine is exclusively dedicated to subsonic work also because in the supersonic world the blackout doesn't offer much due to the limited speed and poor ballistics. For that better stay with the 223rem/5.56 and SPR loads.
Also for supersonic work and if cheap or free .223 parent brass is important for you, the 6x45, 25x45 and 6.5PCC are much better options in terms of simplicity and terminal performance.
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Post by knightsix on Feb 3, 2013 16:15:01 GMT -8
Noveske uses a pistol length gas on their 300s in order to help cycle both sub and super. That short of a gas system does create some other issues though.
Carbine length should run everything as long as you use sub loads with a suppressor.
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Post by knightsix on Feb 3, 2013 16:17:25 GMT -8
Does BHW make a 300 aac barrel in 7 or 8 inch? I saw a reference on another post, but they are not listed in the BHW store.
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