Has anyone tried PPU's new .308 subsonic ammo?
I'm wondering if they've finally developed a low-density powder that can produce low velocity variance from that cartridge on 200gr subsonics. I'll pull and test some when I can find it....
PPU .308 subsonic
Re: PPU .308 subsonic
Never even heard of it before this.
PPU in general works well for me, I'll have to look for some sub's too.
PPU in general works well for me, I'll have to look for some sub's too.
http://www.youtube.com/watch?v=BDtd2jNIwAU MUSAFAR!
http://www.youtube.com/watch?v=8CrOL-ydFMI This is Water DavidW
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http://www.youtube.com/watch?v=8CrOL-ydFMI This is Water DavidW
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Re: PPU .308 subsonic
I shoot it all the time through my Ruger Precision with a Rugged Surge full length and its quieter than a BB gun. Absolutely will not cycle semi-autos.dbooksta wrote:Has anyone tried PPU's new .308 subsonic ammo?
I'm wondering if they've finally developed a low-density powder that can produce low velocity variance from that cartridge on 200gr subsonics. I'll pull and test some when I can find it....
George
Re: PPU .308 subsonic
I got some: I put 20 rounds through a 16" 1:8 barrel and measured muzzle velocity averaging 980fps with stdev of 17fps. At 50 yards that's good enough to keep every round inside a 2" diameter, and given how much volume is in the case I consider it pretty decent variation in velocity. The charge is 9.2gr of a flake powder that takes up 1.0cc. (The necks are also crimped so hard that the bullet jacket is dented by the cirmp.)
I also tested 10 rounds through a 26" 1:10 barrel. At that length they're actually slowing down to about 700fps at the muzzle!
So for a bolt gun with a shorter barrel it's not bad.
I also tested 10 rounds through a 26" 1:10 barrel. At that length they're actually slowing down to about 700fps at the muzzle!
So for a bolt gun with a shorter barrel it's not bad.
Re: PPU .308 subsonic
Excellent follow up, much appreciated.dbooksta wrote:I got some: I put 20 rounds through a 16" 1:8 barrel and measured muzzle velocity averaging 980fps with stdev of 17fps. At 50 yards that's good enough to keep every round inside a 2" diameter, and given how much volume is in the case I consider it pretty decent variation in velocity. The charge is 9.2gr of a flake powder that takes up 1.0cc. (The necks are also crimped so hard that the bullet jacket is dented by the cirmp.)
I also tested 10 rounds through a 26" 1:10 barrel. At that length they're actually slowing down to about 700fps at the muzzle!
So for a bolt gun with a shorter barrel it's not bad.
http://www.youtube.com/watch?v=BDtd2jNIwAU MUSAFAR!
http://www.youtube.com/watch?v=8CrOL-ydFMI This is Water DavidW
Complete Form 1s http://www.silencertalk.com/forum/viewtopic.php?f=10&t=79895
http://www.youtube.com/watch?v=8CrOL-ydFMI This is Water DavidW
Complete Form 1s http://www.silencertalk.com/forum/viewtopic.php?f=10&t=79895