300AAC Blackout(7.62x35)

[nfhjr62]

Anyone loading for or shooting, thinking about ordering a barrel for my AR any thoughts

 

[P1ZombieKiller]

I shoot it but I call it a 300/221 fireball, but I shoot it in a bolt gun. Fun caliber to shoot. I only shoot it subsonic through a supressor.

 

[jscandale]

I just ordered a few barrels for some uppers that I have to build for a few customers. One is for a left handed pistol length suppressed AR and the other is for a 16" suppressed AR.

JS

 

[Hoser]

I have two 300s. One a 9 inch AR and the other a bolt gun. Very fun little round. Basically a AK (7.62x39) round that actually works in AR mags.

I have my Dillon 1050 set up with a Dillon trimmer to make brass. I tried the trim die deal and it was waaaay too painful and slow.

For powder try Vhit N110 and AA1680.

 

[jscandale]

Hey,

Are you the guy with the video of the 1050 in action trimming brass on you tube. If so, neat video. I have a similar setup on a 650.

JS

 

[rcw3]

Anyone loading for or shooting, thinking about ordering a barrel for my AR any thoughts

I think it depends what you want to do with it. Some shooters just like a 30 cal AR-15 but do not have a suppressor and don't really care about subsonic loadings and just like to shoot an accurate rifle. To others, subsonic loads with a suppressor is the big lure for the 300 BLK. In truth you can get barrels that are ported to go both ways and claim to go both ways, but in reality they are (in my opinion) over ported for most supersonic loads and they cycle hard and kind of hammer the rifle when you shoot supersonic loads that run with powder charges typically a bit more than double of the grain weight of what the subsonic loadings run. Adjustable gas blocks are (in my opinion) always a bit temperamental and I like the KISS principle for an AR-15 gas system. So if you want to optimize what you are shooting, you really should decide which way you want to go with things. I currently have an upper with a 16" barrel (carbine length gas tube) that is ported to go both ways and when it cycles with supersonic loads the buffer really slaps the back of the buffer tube (like a second recoil effect - way too hard for my liking). Currently I am doing an accuracy build up with a heavier 20 " 1:11.25" twist barrel (will handle up to the Berger 175 gr. OTM Tactical bullet) just for shooting supersonic loads and will be tuning the porting of the barrel just for those stepped up loadings.

It's a great little cartridge. You can make your own brass with a Redding trim die (great die by the way) but the current brass available from AAC/Remington is about $26/100 (from Midway USA) and it's excellent brass (hard at the base and well annealed at the neck), and it makes it so that it does not pay to make your own.

Ultimately I want to do another pure accuracy build up with another barrel just to shoot bullets around 110-125 gr. (i.e. slower twist barrel) with supersonic loads. The new Sierra 125 gr. MatchKing bullet is excellent for the cartridge (it should be - it was designed for it) and Berger's 125 gr. 30 cal. bullets are great too. In truth, because of the benchrest success of the 30 BR cartridge, there are a lot of bullets in the 110 - 125 gr range that will provide tack driving accuracy with a smaller 30 cal cartridge like the 300 BLK.

We just designed and had a 300 BLK Match chambering reamer made up just to do accuracy build ups with supersonic loads with match and hunting bullets and loadings. It is set up to handle factory ammo and hand loads.

Robert Whitley
www.6mmAR.com

 

[Hoser]

Hey,

Are you the guy with the video of the 1050 in action trimming brass on you tube. If so, neat video. I have a similar setup on a 650.

JS

Not me, but my set up is just like it only I pull the handle. More consistent OAL trim length that way.

I have also made some 300 Whisper Rimmed out of 357 Maximum brass for some friends with TC Contenders for Silhouette shooting.

 

[jscandale]

Hoser,

I performed the same task forming a bunch of Hagar brass out of .30 rem brass several years ago. The dillon trimmer is terrific for rapid brass removal.

JS

 

[rcw3]

By the way, for anyone working with the 300 BLK (or the 300 Whisper or the 300/221 Fireball), you might take a look at the projectile and ammunition offerings of Lehigh Defense (www.LehighDefense.com).

Some of the unique projectiles they make, all of which stabilize in a 1:8" twist barrel:

140 gr. Controlled Fracturing projectile (designed for supersonic applications around 2000 fps in the BLK & Whisper) with around 17 gr. of Ramshot Enforcer or Hodgdon Lil Gun powder

170 gr. Controlled Fracturing projectile (designed for subsonic application in the BLK & Whisper) with around 8.8 gr of Ramshot Enforcer.

186 gr Controlled Fracturing projectile (designed for subsonic application)

192 gr. Maximum Expansion projectile (designed for subsonic application)

200 gr. Maximum Expansion projectile (designed for subsonic application)

I have some of their ammo and all these projectiles and have been working with them - - all I can say is WOW - nice precision stuff!

I will attach some pics below but they have a brief YouTube Video showing the impact differences between shooting their Lehigh Defense 170 gr. Controlled Fracturing projectile (subsonic) and a 220 gr. Sierra MatchKing (subsonic). You can see and hear the impact difference, the 220 Sierra punches a hole through the jug and the Lehigh bullet immediately expands and blows up the jug it is shot into:

[youtube]http://www.youtube.com/watch?v=cMhj6jy9Fw0[/youtube]



Below are some pictures of some of their bullets and ammo.

Robert
www.6mmAR.com
e-mail: rcw3@erols.com

 

[BlackEagle]

I am waiting for a 300 BLK upper that I ordered few weeks ago. They claim the 300 BLK is MORE accurate than the .223 in an M4 out to 300 yards. Its interesting to me that this is near the maximum range at which flat base bullets are supposedly more accurate than boat tail bullets and it is close to the range I shoot most often(approx. 319 yards at my club). I am looking forward to seeing for myself. I've been busy reforming new Lake City brass and I have a bunch of Speer 125 gr. HP TNT flat base bullets.

 

[rcw3]

Pic below is some of the Lehigh Defense 200 gr Maximum Expansion projectiles after being recovered from gel testing.

 

[P1ZombieKiller]

Pic below is some of the Lehigh Defense 200 gr Maximum Expansion projectiles after being recovered from gel testing.

RCW3

Is this 200 grain 308? or 200 grain 45? I only see 192's in the 308 offered on the web site.

I am very interested in more on these. I use my 300 fireball to hunt deer with at subsonic velosities. I was lucky enough to have a buck come in straight on, and I choose to hit him in the neck/spine area in order to try to recover the bullet (at 35 yards). I was shooting a 200 grn SMK at 1050 fps. The bullet hit exactly where I wanted. it went through the chest and lodged just inside the leather after going through the shoulder. The nose of the bullet was bent ever so slightly, but you could see the bullet tumbled through the shoulder. All the other shots on deer have come from broad sides shots, and the bullets just passed through.

With an 85 yard zero point, the 200 grn SMK drops 5 MOA at 135 yards (at 1050 fps out of my gun). What type ballistics would I expect to get from these bullets? I would be very interested in a box of these for 20-75 yard shots on deer size animals. Do you have any more data you can share with us about these bullets.

GREAT POST by the way!!!! I LOVE readin about this stuff.

 

[rcw3]

I am waiting for a 300 BLK upper that I ordered few weeks ago. They claim the 300 BLK is MORE accurate than the .223 in an M4 out to 300 yards. Its interesting to me that this is near the maximum range at which flat base bullets are supposedly more accurate than boat tail bullets and it is close to the range I shoot most often(approx. 319 yards at my club). I am looking forward to seeing for myself. I've been busy reforming new Lake City brass and I have a bunch of Speer 125 gr. HP TNT flat base bullets.

I cannot agree that the 300 BLK is "more accurate" than a .223 out of an AR-15. As a cartridge, the 300 BLK is indeed accurate, but just by virtue of the fact the 30 Cal. projectiles are so much heavier puts a lot more stress on the AR-15 platform (aluminum receivers with push pin hold together), that makes it harder for it to shoot accurately from an AR-15. If you want the ultimate accuracy out of an AR-15 platform, you have better odds staying with a smaller cartridge and lighter bullets. We build up a lot of AR-15 accuracy based uppers and the easiest ones to get to shoot little bitty tight groups are the 20 cal's shooting bullets like the 32 grain bullets (i.e. 20 Practical and 20 Tactical).

That's not to say you cannot make a 30 cal. accuracy upper and have it shoot well, but I would take any statement that the 30 cal uppers are "more accurate" with a grain of salt.

Robert

 

[rcw3]

RCW3

Is this 200 grain 308? or 200 grain 45? I only see 192's in the 308 offered on the web site.

I am very interested in more on these. I use my 300 fireball to hunt deer with at subsonic velosities. I was lucky enough to have a buck come in straight on, and I choose to hit him in the neck/spine area in order to try to recover the bullet (at 35 yards). I was shooting a 200 grn SMK at 1050 fps. The bullet hit exactly where I wanted. it went through the chest and lodged just inside the leather after going through the shoulder. The nose of the bullet was bent ever so slightly, but you could see the bullet tumbled through the shoulder. All the other shots on deer have come from broad sides shots, and the bullets just passed through.

With an 85 yard zero point, the 200 grn SMK drops 5 MOA at 135 yards (at 1050 fps out of my gun). What type ballistics would I expect to get from these bullets? I would be very interested in a box of these for 20-75 yard shots on deer size animals. Do you have any more data you can share with us about these bullets.

GREAT POST by the way!!!! I LOVE readin about this stuff.

The 200 gr. bullet is a 308 bullet (for the 300 BLK, 300 Whisper or the 300/221 Fireball).

I also have some pictures of deer kill showing the effect of the Lehigh Defense projectiles but they are a bit graphic and some people don't like to see those kind of pictures so I am not going to post them here. Suffice it to say the Lehigh Defense Controlled Fracturing and Maximum Expansion projectiles offer a clean quick kill at subsonic velocities (i.e. they don't just punch a small hole through the animal).

Here's one of the subsonic gel tests with the 200 gr. Maximum Expansion bullet - you can see the maximum expansion and energy transfer is happening after about 3" into the gel and stays that way until about 9" with total penetration to around 17") - - - knock down projectiles!

Robert

 

[BlackEagle]

They claim the 300 BLK is MORE accurate than the .223 in an M4 out to 300 yards.

I cannot agree that the 300 BLK is "more accurate" than a .223 out of an AR-15.

That's not to say you cannot make a 30 cal. accuracy upper and have it shoot well, but I would take any statement that the 30 cal upper are "more accurate" with a grain of salt.

Robert

Scroll down to page 5. This claim is coming from someone who should know. But like I said, I am looking forward to seeing for myself. 8) I do not expect that the cartrdidge will shoot more accurately than any AR-15 in .223, but with good reloads I am hoping for 1 MOA accuracy out to 319 yards. I think the claim of better accuracy than an M4 is referring to basic MILSPEC ARs.
http://300aacblackout.com/resources/300-BLK.pdf

 

[RonS]

Can someone tell me what is the maximum effective range for hunting small game and varmints of the 300 AAC BLK for subsonic as well as supersonic use? I have been toying with putting a varmint upper together or a SBR for personal protection. And thanks for the info about Lehigh Defense Ammo. What do you all think of the Wilson Combat 7.62x40 WT cartridge?

 

[jscandale]

I would bet that the hunting capacity is about parallel to a .44 mag., which is quite a bit of punch on close range varmints of any size, even the 2 legged kind. I have talked to several folks that plan on using this cartridge on yard varmints, squirrels, wood chucks, without their wives and neighbors getting alarmed by a gunshot.

JS

 

[P1ZombieKiller]

I have ballistics for a 200 SMK I will post later tonight when I get home.

 

[P1ZombieKiller]

Thought I had it recorded out to 300, but I only have DETAIL to 200. I do remember that it drops 100" (not MOA) from 100 dead on to 300 yards.

200 SMK
Range Drop Drop Energy
(yd) (in) (MOA) (ft•lbs)
50 3.3 6.3 473.4
60 3.3 5.3 470.1
70 3 4.1 466.8
80 2.3 2.8 463.6
90 1.3 1.4 460.4
100 0 0 457.3
110 -1.7 -1.4 454.3
120 -3.7 -2.9 451.3
130 -6 -4.4 448.3
140 -8.7 -5.9 445.4
150 -11.8 -7.5 442.6
160 -15.1 -9 439.8
170 -18.9 -10.6 437
180 -23 -12.2 434.3
190 -27.4 -13.8 431.6
200 -32.2 -15.4 429

 

[nfhjr62]

What was the Muzzle Velocity for the 200 SMK'S