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Re: I read it in a magazine... mike campbell #186059 04/16/10 02:24 PM
Joined: Feb 2003 Posts: 4,109 Likes: 78 Shotgunjones Sidelock
Shotgunjones Sidelock Joined: Feb 2003 Posts: 4,109 Likes: 78	That's interesting Mike. So that's the assumption the calculator programs use. I wonder if it's a valid one, and if so what experimental evidence it was based on. The dymanics seem problematical. Upon shot charge exit, the barrel pressure of a shotgun approximates 500 PSI. Being pressure, it is of course acting in all directions until being released. After the wad clears the muzzle, at which time the leading edge of the pressure wave HAS to be moving at the exact same speed as the wad, the velocity of the expanding gas apparently is assumed to increase to 4,000 FPS as the pressure bleeds to zero from about 500 PSI. I'm reminded of the stop action photos of the shot mass and wads immediatley after muzzle exit. Do we see any effects from the pressure wave acting on the payload after muzzle exit? I'd expect some scattering or at least random wad interference as the gasses out run the payload in the few inches ahead of the muzzle. If anyone has any photos of such effects, or information on the actual dynamics of muzzle exit and pressure equalization I'd be interested in reading the info and seeing the pictures. Interesting stuff, thanks for the discussion. "The price of good shotgunnery is constant practice" - Fred Kimble

Entire Thread
Subject	Posted By	Posted
I read it in a magazine...	mike campbell	04/14/10 02:01 PM
Re: I read it in a magazine...	Jim Legg	04/14/10 02:18 PM
Re: I read it in a magazine...	Dingelfutz	04/14/10 02:28 PM
Re: I read it in a magazine...	eightbore	04/14/10 02:44 PM
Re: I read it in a magazine...	tudurgs	04/14/10 03:42 PM
Re: I read it in a magazine...	L. Brown	04/14/10 03:49 PM
Re: I read it in a magazine...	Chuck H	04/14/10 04:17 PM
Re: I read it in a magazine...	eightbore	04/14/10 04:34 PM
Re: I read it in a magazine...	Chuck H	04/14/10 05:50 PM
Re: I read it in a magazine...	Jim Legg	04/14/10 07:32 PM
Re: I read it in a magazine...	2-piper	04/14/10 07:40 PM
Re: I read it in a magazine...	Jim Legg	04/14/10 09:07 PM
Re: I read it in a magazine...	eightbore	04/14/10 10:38 PM
Re: I read it in a magazine...	Jim Legg	04/14/10 10:49 PM
Re: I read it in a magazine...	L. Brown	04/14/10 11:45 PM
Re: I read it in a magazine...	2-piper	04/15/10 03:29 AM
Re: I read it in a magazine...	keith	04/15/10 07:29 AM
Re: I read it in a magazine...	eightbore	04/15/10 12:06 PM
Re: I read it in a magazine...	keith	04/15/10 04:33 PM
Re: I read it in a magazine...	2-piper	04/15/10 12:33 PM
Re: I read it in a magazine...	L. Brown	04/15/10 01:37 PM
Re: I read it in a magazine...	Jim Legg	04/15/10 01:41 PM
Re: I read it in a magazine...	rwmckee	04/15/10 02:05 PM
Re: I read it in a magazine...	tudurgs	04/15/10 02:11 PM
Re: I read it in a magazine...	eightbore	04/15/10 02:55 PM
Re: I read it in a magazine...	DAM16SXS	04/15/10 03:17 PM
Re: I read it in a magazine...	Chuck H	04/15/10 03:55 PM
Re: I read it in a magazine...	Shotgunjones	04/15/10 03:57 PM
Re: I read it in a magazine...	eightbore	04/15/10 04:12 PM
Re: I read it in a magazine...	Shotgunjones	04/15/10 04:34 PM
Re: I read it in a magazine...	mike campbell	04/15/10 04:00 PM
Re: I read it in a magazine...	rwmckee	04/15/10 04:18 PM
Re: I read it in a magazine...	rwmckee	04/15/10 04:21 PM
Re: I read it in a magazine...	EDM	04/15/10 05:21 PM
Re: I read it in a magazine...	Samuel_Hoggson	04/14/10 10:45 PM
Re: I read it in a magazine...	Dingelfutz	04/14/10 02:21 PM
Re: I read it in a magazine...	David Furman	04/14/10 02:23 PM
Re: I read it in a magazine...	EDM	04/15/10 05:04 PM
Re: I read it in a magazine...	Wonko the Sane	04/15/10 05:19 PM
Re: I read it in a magazine...	David Furman	04/15/10 05:23 PM
Re: I read it in a magazine...	Dingelfutz	04/15/10 05:44 PM
Re: I read it in a magazine...	mike campbell	04/15/10 05:59 PM
Re: I read it in a magazine...	eightbore	04/15/10 05:20 PM
Re: I read it in a magazine...	keith	04/16/10 04:13 AM
Re: I read it in a magazine...	Samuel_Hoggson	04/15/10 06:11 PM
Re: I read it in a magazine...	Drew Hause	04/15/10 07:00 PM
Re: I read it in a magazine...	Jim Legg	04/15/10 07:21 PM
Re: I read it in a magazine...	rwmckee	04/15/10 08:06 PM
Re: I read it in a magazine...	David Furman	04/15/10 08:16 PM
Re: I read it in a magazine...	rwmckee	04/15/10 08:42 PM
Re: I read it in a magazine...	eightbore	04/15/10 09:22 PM
Re: I read it in a magazine...	SDH-MT	04/15/10 09:38 PM
Re: I read it in a magazine...	Jim Legg	04/15/10 09:51 PM
Re: I read it in a magazine...	mike campbell	04/15/10 10:15 PM
Re: I read it in a magazine...	eightbore	04/16/10 12:06 AM
Re: I read it in a magazine...	Chuck H	04/16/10 04:56 AM
Re: I read it in a magazine...	DAM16SXS	04/16/10 09:52 AM
Re: I read it in a magazine...	Chuck H	04/16/10 12:51 PM
Re: I read it in a magazine...	L. Brown	04/16/10 12:54 PM
Re: I read it in a magazine...	Jim Legg	04/16/10 01:32 PM
Re: I read it in a magazine...	eightbore	04/16/10 02:38 PM
Re: I read it in a magazine...	Jim Legg	04/16/10 03:49 PM
Re: I read it in a magazine...	eightbore	04/16/10 04:44 PM
Re: I read it in a magazine...	Jim Legg	04/16/10 06:24 PM
Re: I read it in a magazine...	mike campbell	04/16/10 05:22 PM
Re: I read it in a magazine...	Shotgunjones	04/16/10 06:24 PM
Re: I read it in a magazine...	David Furman	04/16/10 06:51 PM
Re: I read it in a magazine...	mike campbell	04/16/10 08:24 PM
Re: I read it in a magazine...	L. Brown	04/16/10 08:41 PM
Re: I read it in a magazine...	eightbore	04/16/10 10:17 PM
Re: I read it in a magazine...	eightbore	04/16/10 10:29 PM
Re: I read it in a magazine...	mike campbell	04/16/10 11:00 PM
Re: I read it in a magazine...	Jim Legg	04/16/10 11:29 PM
Re: I read it in a magazine...	DAM16SXS	04/17/10 02:04 AM
Re: I read it in a magazine...	L. Brown	04/17/10 11:55 AM
Re: I read it in a magazine...	DAM16SXS	04/17/10 12:18 PM
Re: I read it in a magazine...	eightbore	04/17/10 12:28 PM
Re: I read it in a magazine...	Shotgunjones	04/17/10 01:55 PM
Re: I read it in a magazine...	Jim Legg	04/17/10 02:08 PM
Re: I read it in a magazine...	Daryl Hallquist	04/17/10 02:23 PM
Re: I read it in a magazine...	DAM16SXS	04/17/10 04:17 PM
Re: I read it in a magazine...	Jim Legg	04/17/10 09:03 PM
Re: I read it in a magazine...	L. Brown	04/17/10 10:14 PM
Re: I read it in a magazine...	Daryl Hallquist	04/17/10 10:15 PM
Re: I read it in a magazine...	Jim Legg	04/18/10 12:11 AM
Re: I read it in a magazine...	2-piper	04/18/10 12:53 AM
Re: I read it in a magazine...	Stanton Hillis	04/18/10 02:39 AM
Re: I read it in a magazine...	mike campbell	04/18/10 04:42 AM
Re: I read it in a magazine...	Stanton Hillis	04/18/10 11:13 AM
Re: I read it in a magazine...	mike campbell	04/18/10 01:47 PM
Re: I read it in a magazine...	Stanton Hillis	04/18/10 06:13 PM
Re: I read it in a magazine...	mike campbell	04/18/10 08:44 PM
Re: I read it in a magazine...	Stanton Hillis	04/18/10 09:19 PM
Re: I read it in a magazine...	Jim Legg	04/18/10 10:01 PM
Re: I read it in a magazine...	Stanton Hillis	04/18/10 10:16 PM
Re: I read it in a magazine...	Jim Legg	04/18/10 10:21 PM
Re: I read it in a magazine...	L. Brown	04/18/10 11:29 PM
Re: I read it in a magazine...	rabbit	04/18/10 11:54 PM
Re: I read it in a magazine...	Jim Legg	04/19/10 12:02 AM
Re: I read it in a magazine...	rabbit	04/19/10 12:29 AM
Re: I read it in a magazine...	L. Brown	04/19/10 12:24 PM
Re: I read it in a magazine...	Jim Legg	04/19/10 01:50 PM
Re: I read it in a magazine...	J. Hall	04/19/10 03:06 PM
Re: I read it in a magazine...	Shotgunjones	04/19/10 04:13 PM
Re: I read it in a magazine...	2-piper	04/19/10 06:22 PM
Re: I read it in a magazine...	L. Brown	04/19/10 10:51 PM
Re: I read it in a magazine...	rwmckee	04/20/10 03:31 AM
Re: I read it in a magazine...	L. Brown	04/20/10 11:54 AM
Re: I read it in a magazine...	L. Brown	04/20/10 01:59 PM
Re: I read it in a magazine...	Jim Legg	04/20/10 03:50 PM
Re: I read it in a magazine...	L. Brown	04/21/10 01:41 AM
Re: I read it in a magazine...	2-piper	04/21/10 01:58 AM
Re: I read it in a magazine...	rabbit	04/21/10 02:46 AM
Re: I read it in a magazine...	L. Brown	04/21/10 11:19 AM
Re: I read it in a magazine...	Shotgunjones	04/21/10 01:37 PM
Re: I read it in a magazine...	Jim Legg	04/21/10 06:28 PM
Re: I read it in a magazine...	L. Brown	04/21/10 07:23 PM
Re: I read it in a magazine...	rabbit	04/21/10 11:45 PM
Re: I read it in a magazine...	2-piper	04/22/10 02:49 AM
Re: I read it in a magazine...	rabbit	04/22/10 03:35 AM
Re: I read it in a magazine...	L. Brown	04/22/10 12:33 PM
Re: I read it in a magazine...	Pete	04/22/10 03:29 PM
Re: I read it in a magazine...	2-piper	04/22/10 05:08 PM
Re: I read it in a magazine...	Wonko the Sane	04/22/10 05:49 PM
Re: I read it in a magazine...	L. Brown	04/22/10 10:37 PM
Re: I read it in a magazine...	mike campbell	04/23/10 03:04 AM
Re: I read it in a magazine...	2-piper	04/23/10 03:32 AM
Re: I read it in a magazine...	L. Brown	04/23/10 11:51 AM
Re: I read it in a magazine...	2-piper	04/23/10 12:34 PM
Re: I read it in a magazine...	L. Brown	04/25/10 11:23 PM
Re: I read it in a magazine...	2-piper	04/26/10 12:52 PM
Re: I read it in a magazine...	L. Brown	04/27/10 01:00 PM
Re: I read it in a magazine...	2-piper	04/28/10 01:43 AM
Re: I read it in a magazine...	2-piper	04/20/10 03:55 PM
Re: I read it in a magazine...	J. Hall	04/20/10 05:19 PM
Re: I read it in a magazine...	Wonko the Sane	04/20/10 06:09 PM
Re: I read it in a magazine...	Jim Legg	04/20/10 06:39 PM
Re: I read it in a magazine...	Wonko the Sane	04/20/10 06:59 PM
Re: I read it in a magazine...	mike campbell	04/20/10 07:42 PM
Re: I read it in a magazine...	Jim Legg	04/20/10 07:58 PM
Re: I read it in a magazine...	Samuel_Hoggson	04/20/10 09:22 PM
Re: I read it in a magazine...	Pete	04/21/10 01:22 AM
Re: I read it in a magazine...	Chuck H	04/17/10 01:56 PM
Re: I read it in a magazine...	Chuck H	04/16/10 02:44 PM
Re: I read it in a magazine...	2-piper	04/17/10 08:34 PM
Re: I read it in a magazine...	Shotgunjones	04/20/10 08:07 PM

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