I belive that Charlie Dell's work on chamber ringing work is the best work on the subject. it is based on the work of a 19th century frenchman who studied ringing in relation to shotgun barrels. Charlie made barrels out of brass so that what would be a small amount of ringing in a steel barrel would be more measureable. By the end of testing he understood the problem so well that he could ring a chamber at will and did so using no wad at all and pointing the barrel stright up. 

40 Rod

What Mr. Steele said. 
Exactly.

Glenn

The Earth is round??

FWIW, I gots it a ringed chamber in the shop and it looks pretty real to me.

Glenn

Dale:

It is in an original #3 weight Winchester barrel on a flat spring action, chambered in .32-40. It is a fairly early rifle and so I assume the mild steel barrel.

The ring is centered about 3/16  back from the case mouth. 

Glenn

There are perhaps more warnings in the first edition about wads than are necessary, and these warnings have been continued into the second edition. 
I have put off examination of this topic because of the ad hominem defense and comments that were expected, and these expectations were met above-particular thanks to Charles the frog for his lecture.
The search for examples, stories, data continues. I'm looking for "My 32-40 Knurlman, built in 1892 and owned by me since 1987 and fired countless times with breech-seated bullets and smokeless powder; developed a chamber ring ~1/8" below the case mouth when fired with fixed ammunition, 192 grain bullet, 14.5/IMR4227, Rem 2 1/2 primers and a Dacron wad."
A to-me surprising number of chamber ring stories have to do with new or re-barreled rifles. 
The Third Lyman Cast Bullet Handbook, as we all know, recommends the use of Dacron wads with light charges of faster powders. Many shooters used these Dacron wads, and many still do-if my mail is true. Stories of the use of Dacron wads with thousands of shots by many shooters and no rings.
I just now, just this second, finished reading, once again, Chapter 17B in "The Modern Schuetzen Rifle". I don't for a minute think that Charlie Dell didn't do what he said he did, or that his results aren't what he said they were. I just can't reach the conclusion, from this and the other references, that a Dacron wad holding any reasonable charge of reasonable powder behind a reasonable bullet in fixed ammunition will cause a chamber ring.
I don't think that 10 grains of Bullseye behind a 375248 in 38-55 is a reasonable charge of a reasonable powder. How many of you have used this load? Have used Bullseye for target shooting in a rifle?
As our resident expert on the scientific method will agree, the essential test of a theory is test of the theory.
I can't ring a chamber on a C. Sharps with a 432 grain Ohaus mold bullet over 15/Unique and a Dacron wad, and I've tried for years. Neither can I ring a chamber with 18-22 SR4759, Dacron wad, same gun same bullet. Or in 1903 springfield, 1885 Winchester 38-55, 1882 Maynard 32-35, Werndl, 30-30 Martini bench gun, or the others. I can't do it. 
Can you? Did you? That's what I'm interested in.
Thanks;
joe b.

Joe, if you're not convinced then that appears to be your problem & we probably can't help. But I gotta say that you somewhat undermined yourself with your inclusion of the Ed Landers speculation, which in my mind indicates that he mighta had too much to drink that day or got confused on his meds. No personal disrespect meant, I'm sure he was a fine man but his speculation was pure hogwash IMO.

Seems to me that this is kinda like the question of blowups with reduced loads of slow-burning powders in large cases. No, they won't necessarily blow up every time, or even very often, but they DO blow up and it DOES happen under the specified conditions at least some of the time.

Just like the ringing with the Dacron wads.

So I encourage you to go ahead & keep using the Dacron wads, but don't expect a whole lotta support from this forum's pespective. Or a whole lotta sympathy either if you're unlucky enough to have a ring happen to you.
Good luck, you may need it, Joe

Quote:


I wonder why you're so defensive. Remember, the mind is like a parachute, and works best when the strings aren't tangled!
As to the SEE events you mention, I think I'm about to cast a lot of doubt on these, as a result of some extensive research and data collection.
Here's the only other response to date. Where are those Dacron ring stories?

"I was using a .303 (No1 MkIII* Lithgow made 1942) with 9 gr of 7625 powder and a grape sized wad of 100% pure cotton and a LEE 180 gr gas checked bullet. No problems with several hundred shots. I increased the load gradually over a few weeks shooting to 11gr. After about 3 shots of the 11gr load, extraction became hard and I noticed a ring in the neck of the case and a corresponding ring in the chamber neck. My thoughts were that the 11gr of 7625 was too fast and too much and the flat surface of the powder (held as such by the wad) made a very fast pressure spike which was hitting the bullet base and making a ring bulge in the neck. I still use the same barrel with 18 gr H4198 and no problems with extraction, even though the ring is still there." Kim W on the Jouster Cast Bullet Forum