A different kind of 300 Blackout pistol

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DutchV
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Re: A different kind of 300 Blackout pistol

Post by DutchV » Tue Jan 16, 2018 9:14 pm

Whtsmoke wrote:You could use a thumbhole stock and modify it into something for a pistol?
Sure, as long as you cut off the butt portion and just left the pistol grip area.
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lawboy
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Re: A different kind of 300 Blackout pistol

Post by lawboy » Wed Jan 24, 2018 1:03 am

Neat project. Be sure that this was not a rifle receiver. The fact that it was bare does not mean that it was not registered by Remington with ATF as a rifle receiver when Remington accounted for it in its production report to ATF. That report is what determines rifle, pistol, firearm or other. The fact that it was a new bare receiver is meaningless. Just looking out for you.

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Re: A different kind of 300 Blackout pistol

Post by bangbangping » Sat Dec 08, 2018 12:06 pm

Dolomite, did you finish this? Would love to see some pics.

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Dolomite_Supafly
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Re: A different kind of 300 Blackout pistol

Post by Dolomite_Supafly » Sat Dec 08, 2018 12:53 pm

bangbangping wrote:Dolomite, did you finish this? Would love to see some pics.
Reamer came in yesterday, waiting on the garage to warm up enough to fire up the machine.
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Dolomite_Supafly
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Re: A different kind of 300 Blackout pistol

Post by Dolomite_Supafly » Sat Dec 08, 2018 7:15 pm

I still need to apply a finish to the barrel but it is done. I have also test fired it and it is stable with the 265 DS and 220 Makers. And with my silencer it is very quiet. I have not shot it across a chronograph yet so I have no clue on velocity.

I used an 8 twist Green Mountain blank to create a 3.5" barrel that is threaded 5/8-24. It has a 11 degree target crown as well. The barrel was turned down to 1" so I could use a rail designed for a shotgun tube. Now I just need to find a bipod to fit.

It is a Nucleus short action sitting in a XLR Carbon chassis with the free float tube removed. It will have a folder when finished but the SB Tactical one was too loose for my liking so I returned it.

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John A.
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Re: A different kind of 300 Blackout pistol

Post by John A. » Sat Dec 08, 2018 8:11 pm

Man, that's really something.

I read through the entire topic and was struggling to keep up with what / how you planned to do it, but that looks really neat.
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Re: A different kind of 300 Blackout pistol

Post by ThreeHundredBlackout » Sun Dec 09, 2018 2:50 am

That thing looks like fun ds !
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dellet
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Re: A different kind of 300 Blackout pistol

Post by dellet » Sun Dec 09, 2018 1:19 pm

That came out nice Dolo, look forward to some load/velocity numbers and targets.

The XLR folder is pretty tight and they have a shortened tube, not sure if it would work with your brace tho.
300 Blackout, not just for sub-sonics.

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Re: A different kind of 300 Blackout pistol

Post by Dolomite_Supafly » Sun Dec 09, 2018 1:58 pm

dellet wrote:That came out nice Dolo, look forward to some load/velocity numbers and targets.

The XLR folder is pretty tight and they have a shortened tube, not sure if it would work with your brace tho.
They are perpetually out of stock it seems. I would have bought it first.
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Re: A different kind of 300 Blackout pistol

Post by Dolomite_Supafly » Sun Dec 09, 2018 5:36 pm

I ran some across a chronograph. My 265 grain loads, using 7.0 grains of Blue Dot, normally go ~1,050 fps out of a 16" barrel but they are doing 730 fps out of the 3.5" barrel. I then worked up some loads using Blue Dot and IMR 4227 using a 225g Hornady HPBT. With 8.5 grains of Blue Dot the 225 gave me ~1,030 fps out of this. At 11.5 grains of IMR 4227 the 225 went supersonic but my chronograph gave me an error and I started to see signs of pressure. 10 grains of IMR 4227 gave me 890 fps using the 225 HPBT. Then using the 265 grain bullet 8.5 grains of Blue Dot gave me ~960 fps and with 10.5 grains of IMR 4227 the 265 went 890 fps. I am going to wait on a better day to work up some more loads and shoot for accuracy. So I will definitely be able to get into 1,000+ fps subsonic loads with little work. All those numbers are rounded to the nearest 10 fps. These loads are safe in my guns and may not be safe in yours, always work up.
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