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Author Topic: .300 Blk AR pistol  (Read 2012 times)

Offline Hardwood83

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.300 Blk AR pistol
« on: October 26, 2013, 11:15:27 AM »
Put this together recently. 10.5" MAS Defense upper with a Troy rail. PSA lower (with a coat of silver ceramic engine paint- just because) Sig SB15 arm brace. Fired it last weekend and am very pleased with it, although ammo is hard to find/$$ currently. I don't really have a purpose for it but wanted to try out .300 blk. I will probably add a red dot and get a flash-hider that accommodates my YHM 7.62 Ti phantom silencer.
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Offline RobertH

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Re: .300 Blk AR pistol
« Reply #1 on: October 26, 2013, 11:39:31 AM »
does that arm brace really help?  im asking because that seems like a lot of weight for an arm to hold out there.
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Offline Hardwood83

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Re: .300 Blk AR pistol
« Reply #2 on: October 27, 2013, 02:24:44 PM »
Couldn't tell you- I haven't used it as designed (ie inserting your forearm and strapping in). I have improvised it in a way not intended, and for that it works perfectly.
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Offline gsd

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Re: .300 Blk AR pistol
« Reply #3 on: October 27, 2013, 05:36:33 PM »
Quote from: Hardwood83 on October 27, 2013, 02:24:44 PM
Couldn't tell you- I haven't used it as designed (ie inserting your forearm and strapping in). I have improvised it in a way not intended, and for that it works perfectly.

You wouldn't perhaps have any political aspirations? With that quality of smoke you would do quite well ;)
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Offline shooter

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Re: .300 Blk AR pistol
« Reply #4 on: October 29, 2013, 01:06:53 PM »
 are you using factory ammo? or are you handloading your own? I have one that im goingt to load for and am looking for some loads that people have tried
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Offline Hardwood83

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Re: .300 Blk AR pistol
« Reply #5 on: October 30, 2013, 09:40:53 PM »
Quote from: shooter on October 29, 2013, 01:06:53 PM
are you using factory ammo? or are you handloading your own? I have one that im goingt to load for and am looking for some loads that people have tried

Sorry, just factory loads so far.
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Offline jlficken

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Re: .300 Blk AR pistol
« Reply #6 on: November 01, 2013, 04:07:57 PM »
Quote from: shooter on October 29, 2013, 01:06:53 PM
are you using factory ammo? or are you handloading your own? I have one that im goingt to load for and am looking for some loads that people have tried

My load that I have worked up to:

Hornady 150gr FMJ
15.5gr Lil'Gun (started at 14.4gr I believe)
Remington 7 1/2 primer
Mixed brass (formed from damaged 5.56/223)
2.065" OAL

I could go a little hotter but it cycled my 9" AAC pistol just fine and accuracy testing with a pistol doesn't work the best :)

Get a case gauge (LE Wilson works) as you will need it to form cases.
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