Thanks Bob !!
Just to pass on something I learned rather recently: Most here abouts know the Colt New Service was the Army's M-1909 revolver, as well as the Marine's M-1909. Frankford arsenal loaded a special cartidge close to the commercial .45 Colt round, but having a slightly larger diameter rim. This for more positive extraction with the extractor star of the New Service. Originally this was to have been loaded with Bullseye powder. However Bullseye did not work satisfactorily in the long .45 Colt case. The Army asked DuPont to develop a special powder for use in this ammunition. For years I only knew that the powder was RSQ powder, and was never used in any other commercial ammunition.
DuPont dubbed the powder Revolver Special Quality,hence the RSQ designation.
Just thought I'd pass that along to anybody who didn't know that.
Thanks Bob !!
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NRA Life Member since 1977...
Thin .45 Colt rims are the reason Winchester never originally chambered any of their lever action rifles for the .45 Colt.
Just in case someone might not know, the "EC" headstamp stands for "Evansville Chrysler" and the "EC S" stands for "Evansville Chrysler Sunbeam". Chrysler operated the Evansville (Ind.) Ordnance Plant during WW II and were instrumental in developing steel cased cartridges for the expected shortage of copper. Output was such that the Sunbeam Plant there was pressed into service to help supply cartridge cases.
And, some M-1909 cartridges:
Last edited by BobWright; 01-21-2020 at 02:57 PM.
The original load for the Model 1909 revolver was 5 grains of Bullseye, and the .45 Colt case would accept a double charge of Bullseye, and apparently did. After a few overloads Ordnance had du Pont develop the more bulky R.S.Q. powder mentioned above. The new load was 8.4 grains of the R.S.Q., and the case would not accept a double charge of this powder.
I don't know if you've read the same reports that I have or not, but those cannelures were a source of problems with the experimental M-1906 cartridges. Colt wanted those cannelures at the base of the bullet to prevent bullet set-back during functioning. Smith & Wesson objected to them as they lessened neck tension and allowed the bullet to "walk" forward during recoil in the revolver.