My 10" 300 BLK (with pics)

Discussion about rifles in 300 AAC BLACKOUT (7.62x35mm), hosted by the creator of the cartridge.

Moderators: gds, bakerjw, renegade

snipecatcher
Silent But Deadly
Posts: 181
Joined: Tue Dec 29, 2009 11:38 pm
Location: Texas

My 10" 300 BLK (with pics)

Post by snipecatcher » Wed Apr 06, 2011 7:49 pm

10" Douglas barrel, threaded 1/2x28
Paladin machine 3 position gas-block, pistol position
YHM lightweight handguard, Spectre length
Bushmaster upper/bolt carrier, BCM/VLTOR gunfighter charging handle.
Spikes lower with Timney trigger
DPMS heavy buffer
Magpul furniture, with paperwork/wrench in storage compartment

It's been a long road. The first 1 in 8 twist barrel I got would not stabilize ANY bullets subsonic. The machinist who made me the barrel cut me a deal on the same barrel in 1 in 7 twist. It had the same issue. After some talks with Douglas barrels and Paladin machine, and the help of the people on the Quarterbore forums, it was discovered that the barrels had practically no lands left. Douglas agreed to send Paladin a stainless 1 in 7 blank. This the barrel that is currently on the rifle. It marginally stabilizes 208 A-max's, and 90 XTP's, but nothing else. It shoots supersonic loads fine.

The pistol position selectable gas-block is great. I can run pretty fast powders with lightweight subsonic bullets (or I could if they would work in my barrel) and they will cycle the action. In fact, they cycled it a bit too hard, so I added the heavy buffer. Now it cycles just about right with the silencer.

Image

Image

Image

Image

BulletFlight for Android
snipecatcher
Silent But Deadly
Posts: 181
Joined: Tue Dec 29, 2009 11:38 pm
Location: Texas

Re: My 10" 300 BLK (with pics)

Post by snipecatcher » Wed Apr 06, 2011 7:52 pm

More pics:

Gas-block
Image

Tool I made for the gas-block
Image

Storage for tool and paperwork
Image

I8asquirrel
Senior Silent Operator
Posts: 138
Joined: Mon Nov 15, 2010 11:37 pm
Location: Willamette valley Oregon

Re: My 10" 300 BLK (with pics)

Post by I8asquirrel » Wed Apr 06, 2011 11:58 pm

Very nice set up! Are you shooting the 90 gr XTP as subs?

snipecatcher
Silent But Deadly
Posts: 181
Joined: Tue Dec 29, 2009 11:38 pm
Location: Texas

Re: My 10" 300 BLK (with pics)

Post by snipecatcher » Thu Apr 07, 2011 1:32 pm

I8asquirrel wrote:Very nice set up! Are you shooting the 90 gr XTP as subs?
I was, and they are very quiet, but I've decided not to shoot subs anymore in this rifle. My suppressor is in the shop right now, because something is rattling loosely inside. I think I had a baffle strike. It may have been caused by one of the 90 XTP's, as those were the only subsonics I was shooting the day that it happened. If that's the case, then my rifle really doesn't stabilize ANY bullets at subsonic velocity. It's pretty shitty that the whole purpose behind the cartridge can't be taken advantage of, but there's really nothing I can do about it at this point, I'm stuck with the barrel and won't be able to afford another one for quite some time. I'll just shoot supersonics with this barrel.
-Dan

shuter
Member
Posts: 28
Joined: Fri Feb 04, 2011 5:51 pm

Re: My 10" 300 BLK (with pics)

Post by shuter » Thu Apr 07, 2011 3:49 pm

Nice rig. Source please for the block contraption that holds the upper/lower together for compact carry?

Thanks

snipecatcher
Silent But Deadly
Posts: 181
Joined: Tue Dec 29, 2009 11:38 pm
Location: Texas

Re: My 10" 300 BLK (with pics)

Post by snipecatcher » Thu Apr 07, 2011 3:58 pm

shuter wrote:Nice rig. Source please for the block contraption that holds the upper/lower together for compact carry?

Thanks
Large cutting board, some aluminum rod, a few other little pieces, and lots of cutting/fitting with a jigsaw and dremel. It does a good job of keeping the upper and lower from beating each other up in the bag.

I could draw up some general plans for it if you are interested in making one.
Last edited by snipecatcher on Thu Apr 07, 2011 4:03 pm, edited 1 time in total.

User avatar
LYNRDSKYNRD
Silent Operator
Posts: 85
Joined: Wed Jan 26, 2011 5:31 pm
Location: Heart of Dixie

Re: My 10" 300 BLK (with pics)

Post by LYNRDSKYNRD » Thu Apr 07, 2011 4:02 pm

Great looking set up!!
"People sleep peaceably in their beds at night only because
rough men stand ready to do violence on their behalf."
George Orwell

User avatar
ick
New Member
Posts: 1
Joined: Fri Mar 28, 2008 3:17 pm
Location: Johnstown, PA

Re: My 10" 300 BLK (with pics)

Post by ick » Thu Apr 07, 2011 4:10 pm

snipecatcher wrote: Image
Genius. Simple yet functional. Plans would be great.
Ick

shuter
Member
Posts: 28
Joined: Fri Feb 04, 2011 5:51 pm

Re: My 10" 300 BLK (with pics)

Post by shuter » Thu Apr 07, 2011 7:08 pm

+1 on the plans! Very cool idea. Market it!

User avatar
ds762
Member
Posts: 48
Joined: Sun May 11, 2008 4:49 pm

Re: My 10" 300 BLK (with pics)

Post by ds762 » Fri Apr 08, 2011 8:46 am

Its a shame the new barrel isn't working either. :(

Post Reply