.357 Magnum from a Long Gun

[KilgorII]

Here's some chrono data from yesterday

This is data from a Ruger SP101 3 1/16", a S&W 4" K frame, and a Marlin 1894CP 16.25". All loads were manufactured by Georgia Arms Inc. http://www.georgia-arms.com

Caliber .357 mag
Firearm 4" Smith & Wesson K Frame
Bullet brand and type Ga Arms GDHP
Bullet weight 158
Ambient temperature (Fahrenheit) 85
Cartridge OAL
Primer brand and type
Powder
Powder charge (grain)

Shot # Vel(fps)
1 1240 6 Use Top # of Shots
2 1270
3 1310 554.1577 Muzzle Energy (ft/lbs)
4 1233
5 1234 1256.833 Average Velocity (ft/sec)
6 1254 29.60 Standard Deviation
1233 Minimum Velocity (ft/sec)
1310 Maximum Velocity (ft/sec)
77 Extreme Spread (ft/sec)


Caliber .357 mag
Firearm 3 1/16" Ruger SP101
Bullet brand and type Ga Arms GDHP
Bullet weight 158
Ambient temperature (Fahrenheit) 85
Cartridge OAL
Primer brand and type
Powder
Powder charge (grain)

Shot # Vel(fps)
1 1262 5 Use Top # of Shots
2 1237
3 1232 544.9954 Muzzle Energy (ft/lbs)
4 1244
5 1257 1246.4 Average Velocity (ft/sec)
12.82 Standard Deviation
1232 Minimum Velocity (ft/sec)
1262 Maximum Velocity (ft/sec)
30 Extreme Spread (ft/sec)


Caliber .357 mag
Firearm 16 1/4" Marlin 1894CP
Bullet brand and type Ga Arms GDHP
Bullet weight 158
Ambient temperature (Fahrenheit) 85
Cartridge OAL
Primer brand and type
Powder
Powder charge (grain)

Shot # Vel(fps)
1 1786 6 Use Top # of Shots
2 1870
3 1871 1207.597 Muzzle Energy (ft/lbs)
4 1871
5 1871 1855.333 Average Velocity (ft/sec)
6 1863 34.11 Standard Deviation
1786 Minimum Velocity (ft/sec)
1871 Maximum Velocity (ft/sec)
85 Extreme Spread (ft/sec)


Caliber .357 mag
Firearm 4" Smith & Wesson K frame
Bullet brand and type Ga Arms HP
Bullet weight 125
Ambient temperature (Fahrenheit) 85
Cartridge OAL
Primer brand and type
Powder
Powder charge (grain)

Shot # Vel(fps)
1 1253 6 Use Top # of Shots
2 1312
3 1322 477.8691 Muzzle Energy (ft/lbs)
4 1327
5 1329 1312.167 Average Velocity (ft/sec)
6 1330 29.73 Standard Deviation
1253 Minimum Velocity (ft/sec)
1330 Maximum Velocity (ft/sec)
77 Extreme Spread (ft/sec)

Caliber .357 mag
Firearm 3 1/16" Ruger SP101
Bullet brand and type Ga Arms HP
Bullet weight 125
Ambient temperature (Fahrenheit) 85
Cartridge OAL
Primer brand and type
Powder
Powder charge (grain)

Shot # Vel(fps)
1 1259 5 Use Top # of Shots
2 1277
3 1328 449.4845 Muzzle Energy (ft/lbs)
4 1249
5 1250 1272.6 Average Velocity (ft/sec)
32.94 Standard Deviation
1249 Minimum Velocity (ft/sec)
1328 Maximum Velocity (ft/sec)
79 Extreme Spread (ft/sec)


Caliber .357 mag
Firearm 16 1/4" Marlin 1894CP
Bullet brand and type Ga Arms HP
Bullet weight 125
Ambient temperature (Fahrenheit) 85
Cartridge OAL
Primer brand and type
Powder
Powder charge (grain)

Shot # Vel(fps)
1 1951 3 Use Top # of Shots
2 2015
3 2001 1097.995 Muzzle Energy (ft/lbs)

1989 Average Velocity (ft/sec)
33.65 Standard Deviation
1951 Minimum Velocity (ft/sec)
2015 Maximum Velocity (ft/sec)
64 Extreme Spread (ft/sec)


Caliber .38 special
Firearm 3 1/16" Ruger SP101
Bullet brand and type Ga Arms PSWC
Bullet weight 158
Ambient temperature (Fahrenheit) 85
Cartridge OAL
Primer brand and type
Powder
Powder charge (grain)

Shot # Vel(fps)
1 786.2 5 Use Top # of Shots
2 794.9
3 709.9 205.5204 Muzzle Energy (ft/lbs)
4 722.5
5 813.5 765.4 Average Velocity (ft/sec)
46.20 Standard Deviation
709.9 Minimum Velocity (ft/sec)
813.5 Maximum Velocity (ft/sec)
103.6 Extreme Spread (ft/sec)


Caliber .38 special
Firearm 16 1/4" Marlin 1894CP
Bullet brand and type Ga Arms PSWC
Bullet weight 158
Ambient temperature (Fahrenheit) 85
Cartridge OAL
Primer brand and type
Powder
Powder charge (grain)

Shot # Vel(fps)
1 967.3 1 Use Top # of Shots

328.2467 Muzzle Energy (ft/lbs)

967.3 Average Velocity (ft/sec)
#DIV/0! Standard Deviation
967.3 Minimum Velocity (ft/sec)
967.3 Maximum Velocity (ft/sec)
0 Extreme Spread (ft/sec)


Kilgor

 

[Ron L]

I've toyed with the idea of rechambering my Marlin for 357 Maximum. I've talked with a few 'smiths that thought it could be done without many problems. If the rifle could still shoot Magnums and Specials w/o any problems, heck, I may take the plunge. Don't get me wrong, I enjoy my rifle in Magnum and I don't feel undergunned in the areas I hunt with the Beartooth loads (or would that be Bearteeth?). I'd just like to try something a little different.

I had pretty good luck with WW296 and 158 JHP's, starting with around max loads as the book recommends (don't remember right now how much powder I used). Accuracy was good for both, the Marlin and my Dan Wesson, but slightly better with the scoped Dan.

 

[AC]

Ron L,
I am no gunsmith but don't think rechambering a Marlin M94 will work. The main reason is Marlin's M94 is a short action. In a Win M94, made from the ground up for .30-30 length cases, it would probably work. Something else to consider is pressures and I believe the .357 Max operated at higher pressures than the .357 Mag.

What probably would work, also, is to put a M94 Marlin barrel on their M336 action after rechambering it.