Comments on: 9mm performance with barrel length http://www.saysuncle.com/2006/08/30/9mm_performance_with_barrel_length/ Remember, I do this to entertain me... not you. Tue, 14 Feb 2012 03:14:31 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Randall http://www.saysuncle.com/2006/08/30/9mm_performance_with_barrel_length/comment-page-1/#comment-120555 Randall Tue, 05 Sep 2006 15:22:07 +0000 http://www.saysuncle.com/archives/2006/08/30/9mm_performance_with_barrel_length/#comment-120555 The plot above is a Quickload prediction. It's not strain gauge or chrongraph data. More info on the Quickload internal ballistics software can be found on www.neconos.com Randall Rausch www.ar15barrels.com The plot above is a Quickload prediction.
It’s not strain gauge or chrongraph data.

More info on the Quickload internal ballistics software can be found on http://www.neconos.com

Randall Rausch
http://www.ar15barrels.com

]]> By: SayUncle http://www.saysuncle.com/2006/08/30/9mm_performance_with_barrel_length/comment-page-1/#comment-119075 SayUncle Thu, 31 Aug 2006 10:33:36 +0000 http://www.saysuncle.com/archives/2006/08/30/9mm_performance_with_barrel_length/#comment-119075 It's usually a 5.56 nato. It also comes in many other calibers. It’s usually a 5.56 nato. It also comes in many other calibers.

]]> By: Mike Lorrey http://www.saysuncle.com/2006/08/30/9mm_performance_with_barrel_length/comment-page-1/#comment-118951 Mike Lorrey Thu, 31 Aug 2006 02:51:52 +0000 http://www.saysuncle.com/archives/2006/08/30/9mm_performance_with_barrel_length/#comment-118951 Um, isn't the AR-15 a .223 caliber rifle? Um, isn’t the AR-15 a .223 caliber rifle?

]]> By: SayUncle http://www.saysuncle.com/2006/08/30/9mm_performance_with_barrel_length/comment-page-1/#comment-118847 SayUncle Wed, 30 Aug 2006 19:17:25 +0000 http://www.saysuncle.com/archives/2006/08/30/9mm_performance_with_barrel_length/#comment-118847 Ben, I doubt you'll see a 60 inch AR barrel. Ben, I doubt you’ll see a 60 inch AR barrel.

]]> By: ben http://www.saysuncle.com/2006/08/30/9mm_performance_with_barrel_length/comment-page-1/#comment-118846 ben Wed, 30 Aug 2006 18:45:26 +0000 http://www.saysuncle.com/archives/2006/08/30/9mm_performance_with_barrel_length/#comment-118846 Strange thing is that the plots seem to be approaching asymptotic values which would clearly be wrong. Eventually, as the length increases, the friction in the barrel will be greater than the force of the remaining pressure on the bullet, at which point the speed should drop. I'd like to see data out past that point as a sanity check. Strange thing is that the plots seem to be approaching asymptotic values which would clearly be wrong. Eventually, as the length increases, the friction in the barrel will be greater than the force of the remaining pressure on the bullet, at which point the speed should drop. I’d like to see data out past that point as a sanity check.

]]> By: Standard Mischief http://www.saysuncle.com/2006/08/30/9mm_performance_with_barrel_length/comment-page-1/#comment-118600 Standard Mischief Wed, 30 Aug 2006 05:34:10 +0000 http://www.saysuncle.com/archives/2006/08/30/9mm_performance_with_barrel_length/#comment-118600 That's pretty neat. I wonder how whoever got all those data points. I suppose it was done with one of those strain gauge thingys. Look to see the initial pressure rise. Although it still does not explain how they know the bullet's velocity when it is at the 8” mark in a 16” barrel. I had initially assumed that someone took a barrel and a hacksaw and recrowned the barrel at 16, 14, 12, 10, 8.... inches, but that's clearly not the case. I'd love to see a bunch of charts showing pistol rounds in various carbine and wheelguns (where the bullet and the driving gases need to jump the gap). That’s pretty neat. I wonder how whoever got all those data points. I suppose it was done with one of those strain gauge thingys. Look to see the initial pressure rise. Although it still does not explain how they know the bullet’s velocity when it is at the 8” mark in a 16” barrel.

I had initially assumed that someone took a barrel and a hacksaw and recrowned the barrel at 16, 14, 12, 10, 8…. inches, but that’s clearly not the case.

I’d love to see a bunch of charts showing pistol rounds in various carbine and wheelguns (where the bullet and the driving gases need to jump the gap).

]]> By: Marc http://www.saysuncle.com/2006/08/30/9mm_performance_with_barrel_length/comment-page-1/#comment-118598 Marc Wed, 30 Aug 2006 04:53:43 +0000 http://www.saysuncle.com/archives/2006/08/30/9mm_performance_with_barrel_length/#comment-118598 Nice, thanks for the pointer. Nice, thanks for the pointer.

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