|
07-12-2019, 10:10 AM | #23 | ||||||
|
Apparently, the SAAMI meeting where it was "suggested" that our manufacturers begin marking the chamber length on their shotguns was in 1937, and we begin seeing such markings on 1938 or 39 guns. Some examples from Remington autoloaders, August 1935 --
16-gauge Sportsman Skeet Gun 01 Aug 1935.jpg May 1937 -- 11858 02 May 1937.jpg April 1943 -- 484375 02 April 1943.jpg |
||||||
The Following 2 Users Say Thank You to Dave Noreen For Your Post: |
07-12-2019, 05:33 PM | #24 | ||||||
|
What Dave said.
A.P. Curtis published an article in the March 1938 American Rifleman entitled “Advantages of Short Shotgun Chambers” (courtesy of Larry Brown): SAAMI, assembled in serious conference on March 26, 1937, passed the following resolution: “That an appropriate warning label be placed on all boxes containing smokeless powder shells, cautioning the consumer against using them in short chambered guns and also in guns with Damascus barrels and guns not in first-class condition.” The motion was made and seconded by representatives of two powder companies. That same conference also passed a resolution requiring: “That all guns be marked so that the consumer will be able to tell the chamber length, as for example by marking 2 3/4 inch chamber etc.” Hunter Arms lengthened the 20 gauge chambers from 2 1/2" to 2 3/4" in 1936.
__________________
http://sites.google.com/a/damascuskn...e.com/www/home |
||||||
The Following 2 Users Say Thank You to Drew Hause For Your Post: |
07-12-2019, 08:28 PM | #25 | |||||||
|
Quote:
By my measurements the fired case doesn't even reach the forcing cone. So there is no way they could create a better gas seal. Maybe loaded roll crimp cartridges are longer than loaded folded crimp cartridges? I don't have any to measure. |
|||||||
07-12-2019, 08:54 PM | #26 | |||||||
|
Quote:
We can't compare apples to oranges as in shotshells manufactured in the latter half of the 19th century and early 20th century and those manufactured today. By the way, and please correct me if I'm wrong, the only shells in your picture of six that appear to be factory new are the two in the center.... the other four appear to be reloads. .
__________________
"I'm a Setter man. Not because I think they're better than the other breeds, but because I'm a romantic - stuck on tradition - and to me, a Setter just "belongs" in the grouse picture." George King, "That's Ruff", 2010 - a timeless classic. |
|||||||
07-12-2019, 11:07 PM | #27 | ||||||
|
Here is something that has been posted before. Scroll to about page 15 or so. The rest of the reading is pretty cool, too!
https://docs.google.com/document/d/1...vwLYc-kGA/edit |
||||||
The Following 2 Users Say Thank You to Scott Chapman For Your Post: |
07-13-2019, 04:33 AM | #28 | |||||||
|
Quote:
Regardless of the material used, the cartridge has one length when loaded (roll crimp or folded) and a longer length after it has been fired. Although I read about the 1/8" into the forcing cone theory in the article Scott Chapman provided a link to interesting it doesn't make sense to me. The paper hull obviously has a certain thickness and if it is not allowed to open fully (because it is 1/8" into the forcing cone) the wad and shot column would get squeezed down to a smaller diameter before entering the bore. How can that possibly be a good thing? To me the ideal would be for the cartridge to open fully in the chamber allowing the wad and shot to enter the bore without any constriction. Obviously the chamber length can't be so long that gas can escape around the wad. The other factor is the chamber diameter and hull thickness -- I would think the prefect situation would be to have the inside diameter of the hull (after being expanded by the gas pressure) be the same as the bore diameter -- that way the wad and shot column could make a smooth transition from the hull into the bore -- a difficult task since hulls don't all have the same wall thickness. Check out this illustration, esp (c) showing the expanding gasses escaping past the squeezed down wad and shot column (caused by the hull opening into the forcing cone): |
|||||||
The Following 2 Users Say Thank You to Ronald Scott For Your Post: |
07-13-2019, 04:43 AM | #29 | ||||||
|
|
||||||
The Following User Says Thank You to Ronald Scott For Your Post: |
07-13-2019, 06:48 AM | #30 | |||||||
|
Quote:
May we know the author of this work of compilation? We see the names of a few of our PGCA friends so can we presume this was compiled by Dr. Drew Hause? .
__________________
"I'm a Setter man. Not because I think they're better than the other breeds, but because I'm a romantic - stuck on tradition - and to me, a Setter just "belongs" in the grouse picture." George King, "That's Ruff", 2010 - a timeless classic. |
|||||||
|
|