Building a 300 blackout

[CJNTN]

Originally Posted by broncman

Wilson Combat.

Anyone ever used anything from them? They have a 14.7" stainless and 16" barrel in stock for $249.

Been looking at their barrels and thinking about one. I deffiniteley want a carbine length gas setup instead of the pistol length gas setup. I believe Noveske are the ones that offer both gas lengths... Pistol length gas setup for subsonic only ???

I've always liked their 1911 stuff. I check every so often to see if the 16" fluted is in stock so I can grab one, but I'm not in a hurry to build my 300 yet.

[usmcdoc14]

I may go Wilson Dombat if DSA can't do ...well what they normally do with orders

[Texas97]

i am absolutely going Wilson Combat. DSA seems to be indefinite on their lead times and out of stock items. Wilson Combat seems quality.

anyone looking into or thinking about the advantages of an adjustable gas block on the carbine lenght gas system?

[thedonn007]

Originally Posted by usmcdoc14

I may go Wilson Dombat if DSA can't do ...well what they normally do with orders

I am not really in a hurry. I will probably even forget about it until it shows up on my porch. Maybe like Christmas in July?

[thedonn007]

Originally Posted by thedonn007

I am not really in a hurry. I will probably even forget about it until it shows up on my porch. Maybe like Christmas in July?

DSA says, "Also we are hoping to receive the 300 blackout uppers in the middle of February."

[TheRookie]

I am running a Wilson 16 inch barrel on my 300 blk. Have not shot it yet but should on Saturday. Workmanship looks top notch service was awesome. The bbl is HEAVY though. My build ended up much heavier than expected. Once mine is proved out I will be going sbr so that will help at least. Pics up later

[atblis]

DSA says, "Also we are hoping to receive the 300 blackout uppers in the middle of February."

You can find them on gunbroker.

[CJ5inFourWheelDrive]

Is anyone making a 20" barrel?

[Upper2]

Originally Posted by rsilvers

It will be popular based on price alone. Reformed one-fired 223 brass is 10 cents each:

http://www.allweatherarms.com/1000-P...0-Blackout.htm

And new Remington primed brass is 25 cents each at Midway.

And while some bullets are more optimal than others, you can shoot any 30 cal bullet you have.

I ordered 1000 of their processed brass and it is formed wrong. The shoulder is 1.15" from the base and it is supposed to be 1.10" and will not chamber in my AR.

[aloharover]

I see 1:11 twist barrels and 1;8.5. sooo which one?

[Azzy2000]

Originally Posted by aloharover

I see 1:11 twist barrels and 1;8.5. sooo which one?

I suppose it depends what weight bullet you plan on shooting? I'm curious about this too along with what weight bullet and length of barrel most people are using and staying subsonic. I want to build a short 300 blk upper for my SBR.. It would be used full time with a can and I definitely want it to stay subsonic. CMMG has a nice looking 8.5" upper in their catalog..

[Ben Segrest]

Originally Posted by aloharover

I see 1:11 twist barrels and 1;8.5. sooo which one?

1:11 is "regular" .308 twist. If you plan on much subsonic shooting, go for the faster twist.

[thedonn007]

Originally Posted by Ben Segrest

1:11 is "regular" .308 twist. If you plan on much subsonic shooting, go for the faster twist.

So, for up to 300 yards, will it really matter if I use supersonic rounds through a 1:8 twist barrel?

[aloharover]

Originally Posted by Ben Segrest

1:11 is "regular" .308 twist. If you plan on much subsonic shooting, go for the faster twist.

I know that on the .223 a heavier bullet requires a tighter twist. If you are shooting over 70gs you really want a 1:7. But you are also trying to push them 3000fps.

I was thinking the same way about the blackout. If I want to push something long and heavy like a 175smk I probably want a faster twist. But 308 match guns are only running 1:10.5 range for the 175.

So do you need an even tighter twist because the bullet is traveling slower?

I have me a hankering for a 12-14" barrel on a side charger upper.

[Ben Segrest]

Originally Posted by aloharover

So do you need an even tighter twist because the bullet is traveling slower?

yes. Stability comes from rpms. Theoretically, you can't over-stabilize a bullet. However, in the real world, bullets aren't perfectly balanced, so spinning them faster than needed might cause some accuracy issues.

[tmacie]

So basically you'd need to build a rifle for subsonic loads and one for super?

[Ben Segrest]

Originally Posted by tmacie

So basically you'd need to build a rifle for subsonic loads and one for super?

Not according to what I've seen/heard/read. I'd just pick the twist to better suit what I would be shooting most of the time. Primarily a subsonic gun, go with the tight twist and vice versa for supers. But I'm really just speaking from a theoretical point of view. I don't have any first hand experience with this round.

[aloharover]

So the question really is, for me, is the 8 twist better with super sonics than the 11

[freerider5.0]

1-8 Twist is the standard. Its what i have and mine shoots supers like a champ.

[Texas97]

Originally Posted by Ben Segrest

yes. Stability comes from rpms. Theoretically, you can't over-stabilize a bullet. However, in the real world, bullets aren't perfectly balanced, so spinning them faster than needed might cause some accuracy issues.

Theoretically, yes. but practically, might be a different story. if you start thinking about it itll make your head hurt, circular argument and all.

that being said, my 1:10 in 308 will stabilize up to the 208 gr amax bullet very easily, but for some reason i have a hard time with 155 grain bullets and i have discussed the idea of overstabilization off of a gunsmith and several handloader freinds. there could be other factors like bullet quality and symetry of those 155s, so i havent really come to a conclusion on over-stabilization yet.



Freerider... whats the heaviest supersonic round your shooting out of your 1:8 twist?

[freerider5.0]

147-150 Plinkers. 220g subs. You also have to take in the fact that these rounds don't have the velocity behind them a normal 308 does. There for you can get away with the 1:8 twist.

[Texas97]

I want to shoot 175 grain supers, I think that would be fun for my purposes

[freerider5.0]

That is going to be a slow round. What is your purpose??

[aloharover]

FWIW, a 1:7 223 can have issues shooting stuff below 55gr
I tried some 45gr varmint stuff in a 1:7 and it was all over the map. Same round in a 1:9 was moa accurate.

[jettscott]

Looking at Wilson's stuff andthey have a 7.62X40 WT? WTF?

http://shopwilsoncombat.com/762x40-WT/departments/411/

Their .300 BLK uppers are no longer available. The barrels seem to be in stock.

Buying a complete upper is just like anything else I guess, some stuff is greatly expensive (like Noveske) and some isn't (CMMG). I'd like to have an upper and swap it out with my 5.56 lower for a while until PSA puts theirs back on sale.

BTW, does any agency get curious or frown upon an individual buying say... half a dozen stripped lowers?

I like this barrel:

http://shopwilsoncombat.com/Wilson-C...o/TR-300RC16F/