.300 Blackout SBR project completed...
- Thread starter 2bad4u2
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I didn't see a twist rate in there anywhere. Do you know what kind of spin you're getting with that awesome-short barrel? Does it make much of a difference?
I'd definitely like to try it with a 1-4 PST!
I'd definitely like to try it with a 1-4 PST!
It's a 1:8" twist barrel. Stability won't be an issue. Haven't shot it yet and likely won't have a chance to do so for a while. I'm just glad I got it back home in my safe.
The PST would be a fantastic choice. I've been considering it strongly. I just don't have the additional funds right now to consider anything other than what I have on hand right now. I'll likely keep the SPARC on it for the time being. I have a Falcon 1.5x-5x that is eventually going to find its way on my Remington shown in my OP.
The PST would be a fantastic choice. I've been considering it strongly. I just don't have the additional funds right now to consider anything other than what I have on hand right now. I'll likely keep the SPARC on it for the time being. I have a Falcon 1.5x-5x that is eventually going to find its way on my Remington shown in my OP.
God, just when I thought I had my build budget under control for my 12'' blackout project you have to come and post something like this...
Did you have to cut down the hogue? The last thing I want to do is spend big $ on a stock only to find the fore end to long and have to cut it down...
How loud is it un-suppressed and sub sonic?
There seems to be the myth that they NEED suppressors to be worth it, I have yet to find any actual evidence/numbers about a subsonic unsuppressed shot from an sbr.
Did you have to cut down the hogue? The last thing I want to do is spend big $ on a stock only to find the fore end to long and have to cut it down...
How loud is it un-suppressed and sub sonic?
There seems to be the myth that they NEED suppressors to be worth it, I have yet to find any actual evidence/numbers about a subsonic unsuppressed shot from an sbr.
I got lucky. The barrel stub I used fit the stock fine without having to alter the stock. No need to cut it down. All depends on your combination of components.
As mentioned, I haven't shot it yet and won't likely have time to do so until the Spring.
I totally disagree about the comments about needing a supressor to make the .300 BLK worth while. How many people have bought Mare's Leg lever actions with short barrels? They seem to be fairly popular and don't have supressors.
Take notice of all the interest in pistol caliber carbines in lever actions and those based on bolt guns. Years ago when Marstar posted they were going to build .45 ACP Enfield carbines, the thread had tons of positive response for years even though Marstar failed to deliver its product to the marketplace.
As repeatedly said by many, the .300 BLK is a very flexible cartridge and can be used effectively in a wide range of firearm platforms. It's certainly not a "do all" cartridge and no one to the best have my knowledge has ever made that claim.
Damn, I hate trying to post from my phone. I have too many things to add to be doing this with my thumbs. 
The 11" is def an interesting look. To be honest I like the 16" better but that is simply from an aesthetics point of view.
I can't wait to get mine together now. One will have a 14" heavy barrel like your 16" and the other will be an integral "Expatriot Special".
Unsuppressed noise will greatly depend on the powder used but should still be in the 150 - 155 dB range or about as loud as a 22 cal handgun. So not close to hearing safe but not nearly as loud as a full powered rifle. It is still gonna hurt your ears though.
The 11" is def an interesting look. To be honest I like the 16" better but that is simply from an aesthetics point of view.
I can't wait to get mine together now. One will have a 14" heavy barrel like your 16" and the other will be an integral "Expatriot Special".
Unsuppressed noise will greatly depend on the powder used but should still be in the 150 - 155 dB range or about as loud as a 22 cal handgun. So not close to hearing safe but not nearly as loud as a full powered rifle. It is still gonna hurt your ears though.
Thats exactly the project I had hoped to do some day. I was gonna use a Savage action and swap the barrel back and forth with a .223 AI. Everything I read about the .300 AAC Blackout makes me want to get a gun chambered in it.
I to am always confused by the people who think it is only suitable for use with suppressors
The only thing to do next is to make it work with STANAG magazines.
I to am always confused by the people who think it is only suitable for use with suppressors
The only thing to do next is to make it work with STANAG magazines.
Man, a bit of Cerakote and a handstop and you're laughing.
I may have been inclined to leave 2-3" more barrel - but that's pretty slick.
The nice thing about using the Hogue in this application is the texture and inherent grip of the rubber used in the stock. Think of it as a built in hand stop.
As for barrel length, I didn't have a choice in the matter. I used what was left of the barrel blank that I'd bought for my Rem 700 project. It is what it is. It's not like I could add a couple extra inches to it.
I thought I might have to thread a long muzzle brake or flash supressor to the barrel to extend it beyond the forend but it wasn't necessary, so I didn't bother.
There are guys in the US killing deer with 8" AR's in 300 BLK and they are reporting excellent terminal performance with both the 125gr supersonics as well as the 208 AMAX subsonic.
With subsonics the 300 doesn't lose any velocity at all with a short barrel. I have a 7" AR that will launch 208 AMAXs at 1000 fps no problem.
I am getting velocities in the 2000 fps range with 125gr Ballistic Tips out of a 10" AR. that should be more than enough to kill a deer.
The Whisper / Blackout is a supremely versatile round that has few equals. It can safely launch big heavy bullets at velocities ranging from subsonic to medium. It can also launch lightweight bullets at 2/3 the operating velocity of much larger cartridges while using less powder and making less noise. It does not lose velocity when used with a short barrel like most larger cases.
There are only two other cases in this class that I am aware of. Those are the 7.62x39 and the 30BR. The Russian round has several issues that tend to lead to ####ty accuracy and it uses an oddball case head so there aren't so many rifles it can be chambered in. The 30BR may be a better choice in a bolt gun but the Whisper / Blackout can hold its own for most uses.
Super heavy subsonics are basically pointless. The people advocating them have gotten hung up on the energy equation without bothering to see how subsonics perform downrange.
I have yet to see a subsonic do anything other than over penetrate to a massive degree. If a 150gr subsonic will blow right through a deer and fly out the other side wasting much of its energy then how will adding weight and thus energy improve terminal performance? A heavier bullet is going to do nothing but waste more energy out the back side of the deer.
Heavier bullets also produce more felt recoil and have a more pronounced trajectory than the lighter stuff. In a bolt gun I use 150-170gr subsonics because there is no issue with cycling the action. In my ARs I like the 208 AMAX because it is cheaper than the SMK and it allows the action to cycle properly.
I have yet to see a subsonic do anything other than over penetrate to a massive degree. If a 150gr subsonic will blow right through a deer and fly out the other side wasting much of its energy then how will adding weight and thus energy improve terminal performance? A heavier bullet is going to do nothing but waste more energy out the back side of the deer.
Heavier bullets also produce more felt recoil and have a more pronounced trajectory than the lighter stuff. In a bolt gun I use 150-170gr subsonics because there is no issue with cycling the action. In my ARs I like the 208 AMAX because it is cheaper than the SMK and it allows the action to cycle properly.
