So...is there a wildcat round that...

[Mark A]

Is like a 300 blackout but using a 308 case? Something shooting a big honkin bullet but that could possibly be loaded to subsonic velocity?

 

It looks like I am going to find myself with a AR10 to build. I already have a standard M&P10, a precision 308 built on the CMT chassis and am almost done with a 308 SBR

 

If the TGO 308 comes to pass I thought about doing something cool and different even though I really don't need to add another cartridge to load. Possibly the answer is to just load a standard 308 to subsonic velocity and tune the gas and buffer spring to cycle the weapon correctly.

 

But, something spitting out a big old piece of lead is holding a certain appeal.

 

I guess I need to look around and see what suppressors are offered as well. Not much sense in loading something subsonic if I can't suppress it.

 

Anyway, thanks in advance for any info offered.

 

Mark

[LngRngShtr]

time to come up with a .401 Blackout ? always liked the .40

 

JD Jones has already done some groundwork for you on these :

.338 Whisper

 

also been done in .375 and .416 Whisper

Edited September 29, 2014 by LngRngShtr

[quietmike]

http://www.thefirearmblog.com/blog/2014/06/27/another-new-ar15-round-375-reaper/

[nightrunner]

.338federal

There is a company making an upper for the ar10 in 450marlin, should be big enough, only 5 rd mags though i think.

.358win

Also this if you reload,

http://www.thefirearmblog.com/blog/2014/05/08/introducing-45-raptor-cartridge-ar-10/ Edited September 29, 2014 by nightrunner

[joustin]

The 45 Raptor should be coming out soon, kinda like the 458 SOCOM but faster
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[Mark A]

Thanks for the info. That 338 whisper looks interesting. Actually they all look interesting but the 338 seems to meet all the criteria.

I'm going to call SSK industries tomorrow and price up some goodies

Mark

[dlm37015]

308 x1.5 great sub sonic round

[Jct1911]

A gentleman by the forum name BTsniper on castboolits has done .40-06 and .40-08. The .35's get best ROI with bullet weight versus velocity. But subsonic changes that quickly.

The 45Raptor brass and barrels are available. Uses 460s&w dies and load data. Edited September 30, 2014 by Jct1911