Professional Soldiers ® - 5.56 fired through short barrels

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Professional Soldiers ® (http://www.professionalsoldiers.com/forums/index.php)

- Ammo Talk (http://www.professionalsoldiers.com/forums/forumdisplay.php?f=51)

- - 5.56 fired through short barrels (http://www.professionalsoldiers.com/forums/showthread.php?t=23143)

kgoerz

11-06-2013 15:45

Can't remember the exact velocity. But when I was a fed we Chronographed a bunch of different stuff thru our 10" barrels. The winner was Federal 77 grain HP. I remember when the Army first issued the M4 to the Infantry in mass. My first thought was did they change the Ammo. Answer was no. It was right around Faluija. Reg Army guys were begging SF for Ammo. Marines went back to their 21" AR'S.

Max_Tab

11-12-2013 12:37

Quote:

Originally Posted by The_Mentalist (Post 512162)

Some of the issues with short barrel rifles (or AR pistols) make them pretty much useless in the real world. Although, as previously posted, a VSBR or SBR may be appropriate for vehicular operations with close proximity targets, typically, anything below a 16" barrel will cause performance degradation. Lower velocity due to incomplete burning of the powder, excessive flash and greater stress on the operating system due to gas pressures in a shorter system.

This is why I'm contemplating the .300 Blackout. It was designed to burn all the powder in the cartridge, at 9 inches.

I saw some old post's talking about the .300, anyone got some experience with it yet? (if I missed a thread talking about it, sorry)

The Reaper

11-12-2013 13:22

Quote:

Originally Posted by Max_Tab (Post 529810)

I like it.

TR

koz	11-12-2013 14:11

Quote:

Originally Posted by Max_Tab (Post 529810)

I agree with TR. It's a cool round. I've got the 10" barrel. There are a lot of reloading and factory options from supersonic to subsonic. Southwest Ammo had subs in stock pretty recently. Barnes has made some specific bullets for it (expanding at certain velocities). You can also use 5.56 brass to make 300BLK, it just takes some effort. The thing I like the most is it only takes an upper change. Same BCG (bolt face), same magazines, etc…

Peregrino

11-12-2013 20:06

I like it. Mine's a 16" barrel with a carbine gas system and required some initial tweaking. It now shoots 125s, 147s and 220s (all I've experimented with) just fine. I do need to get the right optics for it though. The current EoTech is OK but it doesn't maximize the potential.

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