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Feb 12th, 2024
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 SBR 6.8 Vs. 300 Blackout
#5626901
02/28/15 11:59 PM
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Joined: Jul 2007
Posts: 35,118
Brother in-law
OP
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OP
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Joined: Jul 2007
Posts: 35,118 |
Suppressed and Unsuppressed
I care more about the power of regular power loads
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5626977
03/01/15 12:41 AM
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Joined: Jul 2007
Posts: 1,789
ZenArchery
Pro Tracker
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Pro Tracker
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 <--- soon... 300 purpose close quarters and swapping out standard ar parts. 6.8 purpose step up from 5.56 at longer distance. What is your intent and what distance? I use my 300 for night hunts under 100 yards unsuppressed.
Last edited by ZenArchery; 03/01/15 12:45 AM.
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5626984
03/01/15 12:45 AM
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Joined: Dec 2008
Posts: 41,163
J.G.
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Posts: 41,163 |
Hog killin 100 yards and in?
![[Linked Image]](http://www.precisionriflehunters.com/wp-content/uploads/2017/07/garvey.jpg) 800 Yard Steel Range Precision Rifle Instruction Memberships and Classes Available
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5626997
03/01/15 12:50 AM
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Joined: Jul 2007
Posts: 35,118
Brother in-law
OP
THF Celebrity
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OP
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Joined: Jul 2007
Posts: 35,118 |
No agenda
I only hear about quiet loads, more interested in full power vs full power. I know the 300 is quiet suppressed
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5627056
03/01/15 01:19 AM
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Joined: Dec 2008
Posts: 41,163
J.G.
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Posts: 41,163 |
Supersonic is supersonic, which means sonic crack of the bullet. What the shooter hears in 6.8 SPC and 300 Black Out may be equal when ran through the same suppressor. On my range when shoot long distance suppressed, you can hear the bullet flying until it gets to the target. Peeeeeeeeeewwwwwwww......ping 
Last edited by FiremanJG; 03/01/15 01:22 AM.
800 Yard Steel Range Precision Rifle Instruction Memberships and Classes Available
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5627244
03/01/15 02:28 AM
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Joined: Sep 2010
Posts: 7,133
SR025
THF Trophy Hunter
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THF Trophy Hunter
Joined: Sep 2010
Posts: 7,133 |
You gonna be banging steel bro?
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Re: SBR 6.8 Vs. 300 Blackout
[Re: SR025]
#5627288
03/01/15 02:46 AM
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Joined: Jul 2007
Posts: 35,118
Brother in-law
OP
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OP
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You gonna be banging steel bro? Only your girl  This will be a hunter if I get one
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5627301
03/01/15 02:51 AM
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Joined: Aug 2011
Posts: 6,174
Tactical Cowboy
THF Trophy Hunter
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THF Trophy Hunter
Joined: Aug 2011
Posts: 6,174 |
The secret to a long life is to try not to shorten it.
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5627766
03/01/15 02:22 PM
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Joined: Sep 2010
Posts: 2,776
NTXBowfisher
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+1 for .300BLK, it has inadvertently become my go to rifle now, killed a couple deer and bunch of hogs with it last year.
signature coming soon
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5627781
03/01/15 02:35 PM
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Joined: Sep 2010
Posts: 7,133
SR025
THF Trophy Hunter
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THF Trophy Hunter
Joined: Sep 2010
Posts: 7,133 |
You gonna be banging steel bro? Only your girl This will be a hunter if I get one 
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5627873
03/01/15 03:30 PM
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Joined: Mar 2012
Posts: 3,809
Cleric
Extreme Tracker
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Extreme Tracker
Joined: Mar 2012
Posts: 3,809 |
I went 300. Only cause dsg did a deal on seekins upper for Black Friday. Haven't really shot it. Just bought some of chads supersonic bullets
My issue with subsonic is I don't understand why everyone wants them. For 300 it's effectively a 45 acp bullet. A 220 smk going 1000 fps vs a 230 round nose going 950 fps. They are fun for the range but haven't seen a purpose beyond that
Although the concept of a 6.8 does really intrigue me
Last edited by Cleric; 03/01/15 03:30 PM.
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Re: SBR 6.8 Vs. 300 Blackout
[Re: NTXBowfisher]
#5628163
03/01/15 05:49 PM
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Joined: Aug 2012
Posts: 3,993
ImTheReasonDovesMourn
Snarky Mark
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Snarky Mark
Joined: Aug 2012
Posts: 3,993 |
+1 for .300BLK, it has inadvertently become my go to rifle now, killed a couple deer and bunch of hogs with it last year. Same here. It's been perfect for hunting out of my pop-up blind. Nice and compact.
Haha yea I polished that thing for hours.
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5628236
03/01/15 06:26 PM
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Joined: Jun 2005
Posts: 2,481
BCJ
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6.8 is going to be a better supersonic round as that was the purpose of design.
300 was designed to push a heavy bullet subsonic out of a short barrel to be better is roles where the MP5SD was previously used
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5628804
03/01/15 11:09 PM
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Joined: Jan 2009
Posts: 2,044
HicksHunter
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If I'm going for subsonic, suppressed performance, I'd go for a 9mm or 45 carbine. The practice ammo's a heck of a lot cheaper than 300 blk.
If I'm going for supersonic performance, 6.8 all the way.
300 blackout has filled a niche that doesn't really exist in my mind.
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5628873
03/01/15 11:34 PM
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Joined: Feb 2010
Posts: 11,658
GusWayne
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Re: SBR 6.8 Vs. 300 Blackout
[Re: GusWayne]
#5629194
03/02/15 01:54 AM
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Joined: Jan 2013
Posts: 102
Oldpaint
Woodsman
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Woodsman
Joined: Jan 2013
Posts: 102 |
I have both in AR platforms. If you are going to use it for supersonic the 6.8 all day. If suppressed the 300 Blackout wins. I use Barnes TTSX 95 grains in 6.8 and can almost get to 3000 FPS, maybe 2900 to 2950. You can also shoot 115-120's. I have shot axis, fallow, sika, whitetail and too many hogs to count with the 6.8. I use the 300 for night vision hunts because you can get closer at night and plus suppressed you can shoot a 200+ grain bullet. But for a day hunt I have no problem letting my daughters shoot the 6.8 for anything, no recoil at all.
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Re: SBR 6.8 Vs. 300 Blackout
[Re: J.G.]
#5629527
03/02/15 04:14 AM
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Joined: Jul 2007
Posts: 1,789
ZenArchery
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Hog killin 100 yards and in? Yes, night vision. 95% of my shots have been 60 yards or less. The farthest I've taken is a 110 yard shot on a boar that was in a huge 1000+ yard wheat field. No way to get closer without sloshing through the mud and having him hear all the muck.
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5629681
03/02/15 11:34 AM
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Joined: Feb 2009
Posts: 5,519
tannerlst
THF Trophy Hunter
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THF Trophy Hunter
Joined: Feb 2009
Posts: 5,519 |
I've had quite a few 300blk set ups ... Got rid of em all . Had quite a few 6.8's a well and still have one if that tells u anything
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5629761
03/02/15 01:19 PM
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Joined: Dec 2010
Posts: 8,841
DocHorton
THF Trophy Hunter
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Joined: Dec 2010
Posts: 8,841 |
Guys....he's asking about SBR's, not full length barrels. How many of y'all are running 6.8 SBR's?
I want to know as well because I only run suppressed SBR's now and am curious as to which will perform better. I already have a 300 BO but wondering if a 6.8 SBR with a 10.5-12" barrel would be better? 250 yards and closer only....
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5629770
03/02/15 01:24 PM
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Joined: Sep 2013
Posts: 234
bobsumner
Woodsman
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Woodsman
Joined: Sep 2013
Posts: 234 |
Get both. Hypersonic the 300BO has good ballistics with the 110gr out to 300 yards. The greatness is the versatility, it is not perfect, but for quiet CQB and hunting versatility with a mag change, hard to beat. If you are going to run subs, better be a reloader.
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Re: SBR 6.8 Vs. 300 Blackout
[Re: DocHorton]
#5629788
03/02/15 01:31 PM
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Joined: Jun 2005
Posts: 2,481
BCJ
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Guys....he's asking about SBR's, not full length barrels. How many of y'all are running 6.8 SBR's?
I want to know as well because I only run suppressed SBR's now and am curious as to which will perform better. I already have a 300 BO but wondering if a 6.8 SBR with a 10.5-12" barrel would be better? 250 yards and closer only.... The 6.8 was designed as a SBR cartridge.
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Re: SBR 6.8 Vs. 300 Blackout
[Re: BCJ]
#5629810
03/02/15 01:43 PM
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Joined: Dec 2010
Posts: 8,841
DocHorton
THF Trophy Hunter
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Posts: 8,841 |
Guys....he's asking about SBR's, not full length barrels. How many of y'all are running 6.8 SBR's?
I want to know as well because I only run suppressed SBR's now and am curious as to which will perform better. I already have a 300 BO but wondering if a 6.8 SBR with a 10.5-12" barrel would be better? 250 yards and closer only.... The 6.8 was designed as a SBR cartridge. That doesn't clarify anything, so was the 300. Like I said....."I only run suppressed SBR's now and am curious as to which will perform better. I already have a 300 BO but wondering if a 6.8 SBR with a 10.5-12" barrel would be better? 250 yards and closer only.... "
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Re: SBR 6.8 Vs. 300 Blackout
[Re: Brother in-law]
#5629923
03/02/15 02:27 PM
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Joined: Jan 2009
Posts: 2,044
HicksHunter
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It brings you back to what we've been talking about the entire time. Since they both perform well from short barrels, it's a choice of whether you want to run supersonic or subsonic. Closer than 100, you can probably go with the 300blk. Any farther out, and I don't know if I'd feel comfortable with the ballistics, specifically the drop. I'd just go 6.8 at that point.
I'm just waiting for my stamp to come back, then I'll be running a 6.8 SBR.
One thing to note, though, is that 300blk is supposed to perform well from barrels as short at 8", while 6.8 is sort of optimized for around 12" barrels. But 5.56 works well for 16" barrels, and that doesn't stop people from going shorter. You'll have a hard time finding 6.8 barrels shorter than 12" if that's what you're looking for.
Last edited by HicksHunter; 03/02/15 02:29 PM.
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Re: SBR 6.8 Vs. 300 Blackout
[Re: HicksHunter]
#5630023
03/02/15 03:16 PM
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Joined: Dec 2010
Posts: 8,841
DocHorton
THF Trophy Hunter
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THF Trophy Hunter
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Posts: 8,841 |
It brings you back to what we've been talking about the entire time. Since they both perform well from short barrels, it's a choice of whether you want to run supersonic or subsonic. Closer than 100, you can probably go with the 300blk. Any farther out, and I don't know if I'd feel comfortable with the ballistics, specifically the drop. I'd just go 6.8 at that point.
I'm just waiting for my stamp to come back, then I'll be running a 6.8 SBR.
One thing to note, though, is that 300blk is supposed to perform well from barrels as short at 8", while 6.8 is sort of optimized for around 12" barrels. But 5.56 works well for 16" barrels, and that doesn't stop people from going shorter. You'll have a hard time finding 6.8 barrels shorter than 12" if that's what you're looking for. I'm only talking about supersonic....that's what this whole thread is supposed to be about before everyone got side tracked. Obviously subsonic is no contest here. So a 6.8 in a 11.5" barrel is substantially better for hunting under 250 yards than a 8.5" 300 BO? Just trying to clarify....
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