While netting and looking for the article on
supposed model 10 heat treat for the 357
10-6 Smith did for New York, I found a
Dec 1982 report the Department of the
Army did at Aberdeen Proving Ground
involving the S&W model 15-3 K frame
and Colt D frame Diamondback.
Some of the +p loads were hot and
a few of them went over 1200FPS .Page 19
shows the following +p loads:
Smith and Wesson "+P" 90-grain jacketed soft point
Remington "+P" 95-grain jacketed hollowpoint
Smith and Wesson "+P" 110-grain jacketed hollowpoint
Speer "+P" 125-grain jacketed hollowpoint
Speer "+P" 140-grain jacketed hollowpoint
Smith and Wesson "+P" 158-grain semi-wad cutter
Federal "+P" 158-grain lead round nose
Smith and Wesson "+P" 158-grain jacketed soft point
Smith and Wesson "+P" 158-grain jacketed hollowpoint
D.A. found recoil plates(Colt) of the revolvers are
the failure point of their design. They're hammer
nose bushings for us Smith and Wesson folks and
also the weak point.
One interesting item was the Rockwell hardness
of the cylinders on page 41:
"Hardness measurements were made on the Colt
and Smith and Wesson cylinder surfaces which
had been etched and polished. A dozen readings
were read on each.
The Colt averaged a Rockwell "C" hardness of
37.5+/- .8.
The Smith and Wesson averaged a Rockwell "C"
hardness of 45.7+/- 1.2.
Converting, these to Brinell hardness one gets for
the Colt, Bhn 347, and for the Smith and Wesson
Bhn 434.7 ".
https://apps.dtic.mil/dtic/tr/fulltext/u2/a122759.pdf
If You're kinda geeky like I am take a gander at this one.
It might make you go "Humm...." and wonder how many
of the old timers who reamed out their model 10's for 357's
actually blew up their guns or just retired them when their
hammer nose bushings failed. Or.....
supposed model 10 heat treat for the 357
10-6 Smith did for New York, I found a
Dec 1982 report the Department of the
Army did at Aberdeen Proving Ground
involving the S&W model 15-3 K frame
and Colt D frame Diamondback.
Some of the +p loads were hot and
a few of them went over 1200FPS .Page 19
shows the following +p loads:
Smith and Wesson "+P" 90-grain jacketed soft point
Remington "+P" 95-grain jacketed hollowpoint
Smith and Wesson "+P" 110-grain jacketed hollowpoint
Speer "+P" 125-grain jacketed hollowpoint
Speer "+P" 140-grain jacketed hollowpoint
Smith and Wesson "+P" 158-grain semi-wad cutter
Federal "+P" 158-grain lead round nose
Smith and Wesson "+P" 158-grain jacketed soft point
Smith and Wesson "+P" 158-grain jacketed hollowpoint
D.A. found recoil plates(Colt) of the revolvers are
the failure point of their design. They're hammer
nose bushings for us Smith and Wesson folks and
also the weak point.
One interesting item was the Rockwell hardness
of the cylinders on page 41:
"Hardness measurements were made on the Colt
and Smith and Wesson cylinder surfaces which
had been etched and polished. A dozen readings
were read on each.
The Colt averaged a Rockwell "C" hardness of
37.5+/- .8.
The Smith and Wesson averaged a Rockwell "C"
hardness of 45.7+/- 1.2.
Converting, these to Brinell hardness one gets for
the Colt, Bhn 347, and for the Smith and Wesson
Bhn 434.7 ".
https://apps.dtic.mil/dtic/tr/fulltext/u2/a122759.pdf
If You're kinda geeky like I am take a gander at this one.
It might make you go "Humm...." and wonder how many
of the old timers who reamed out their model 10's for 357's
actually blew up their guns or just retired them when their
hammer nose bushings failed. Or.....
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