.357mag, 2400 (13.5gr-15.3gr), 158gr LSWC


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roo_ster
April 11, 2006, 12:48 PM
Another THR member asked me about my .357mag/2400/158grLSWC loads & I decided I might as well paste all the data in one place.

I had to place load comments in a separate box, as I couldn't get it to render properly.

COL is not included, as my COL is derived from a dummy cartridge. That will eventually get into my load notes (COL, not cartridge). COL is determined by the crimp groove, so that I get a good, heavy roll crimp in the groove.

There were two iterations:
1. 13.5gr-15.3gr in roughly .5gr increments; loads chronographed
2. 15.2gr & 15.3gr

[code]Index 1 2 3 4 5 6 7
Cartridge .357_Magnum .357_Magnum .357_Magnum .357_Magnum .357_Magnum .357_Magnum .357_Magnum
Date 2005-05-07 2005-05-07 2005-05-07 2005-05-07 2005-05-07 2005-10-04 2005-10-04
Temp 75 75 75 75 75
Wind 10_45 10_45 10_45 10_45 10_45
Wpn_Manuf Smith & Wesson Smith & Wesson Smith & Wesson Smith & Wesson Smith & Wesson Smith & Wesson Smith & Wesson
Wpn_Model 686 686 686 686 686 686 686
Wpn_BBL 4 4 4 4 4 4 4
Wpn_Serial
Bullet_Manuf Rucker Rucker Rucker Rucker Rucker Rucker Rucker
Bullet_Name - - - - - - -
Bullet_Const Cast Cast Cast Cast Cast Cast Cast
Bullet_Alloy Unk Unk Unk Unk Unk Unk Unk
Bullet_Profile SWC SWC SWC SWC SWC SWC SWC
Bullet_Wt 158 158 158 158 158 158 158
Bullet_Base Bevel Bevel Bevel Bevel Bevel Bevel Bevel
Bullet_Diam 0.358 0.358 0.358 0.358 0.358 0.358 0.358
Bullet_Lube Unk Unk Unk Unk Unk Unk Unk
Bullet_BHN Unk Unk Unk Unk Unk Unk Unk
Powder_Manuf Alliant Alliant Alliant Alliant Alliant Alliant Alliant
Powder_Name 2400 2400 2400 2400 2400 2400 2400
Powder_Wt 13.5 14 14.5 15 15.3 15.2 15.3
Powder_Filler None None None None None None None
Primer_Manuf
Primer_Name
Primer_Type SP SP SP SP SP SP SP
Brass_Manuf Mixed Mixed Mixed Mixed Mixed Winchester Winchester
Brass_Trim_Length NA NA NA NA NA NA NA
COL
Crimp Roll_H Roll_H Roll_H Roll_H Roll_H Roll_H Roll_H
Vel_Avg 1195 1242 1282 1344 1438
Vel_SD_Avg 21.93 32.41 38 60.6 125.05
Vel_ES 31.07 78.19 71.43 117.6 228
Group_Size 1.531 3.428 2.034 1.911 1.302 8 10.6
Group_Num_Shots 5 5 5 5 5 16 14
Group_Dist 10 10 10 10 10 25 25
MOA 14.61997307 32.7349887 19.42326925 18.24870577 12.43318415 30.55774907 40.48901752
MOA/Shot 2.923994614 6.546997739 3.884653851 3.649741155 2.486636831 1.909859317 2.89207268
Pressure



Index Comments
1 Unburnt power in chambers & bbl; Primer strikes rounded; Dry bronze brush chambers & bbl
2 Unburnt power in chambers & bbl; Primer strikes rounded; Leading first 1/5 of bbl; Dry bronze brush chambers & bbl
3 Unburnt power in bbl only; Primer strikes rounded; Leading first 1/3 of bbl; Dry bronze brush chambers & bbl
4 Unburnt power in bbl only; Primer strikes more normal; Leading first 1/3 of bbl; Dry bronze brush chambers & bbl
5 Unburnt power in one chamber only & bbl; Primer strikes more normal; Leading first 1/2 of bbl; Dry bronze brush chambers & bbl
6 Little unburned powder
7 Little unburned powder

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The Bushmaster
April 11, 2006, 01:45 PM
Unburned powder...Are we talking about the little yellow (what looks like) "knats eggs" left over after firing rounds loaded with 2400?:)

roo_ster
April 11, 2006, 03:12 PM
The unburned powder looked like little, dark kernels. I guess it could have been burned fouling, but it seemed like unburned powder to my inexpert eyes.

The Bushmaster
April 11, 2006, 03:32 PM
No...These are tiny yellowish balls or beads that decrease as The powder charge is increased.:)

Coltdriver
April 11, 2006, 07:03 PM
I have used similar loadings, 14.5 grains in a Ruger GP100 but I was using 158 grain jacketed hollow points.

Is there a fps limit beyond which it is not advisable to push lead bullets?

ChristopherG
April 11, 2006, 07:45 PM
Well, no, you can push them as fast as you like, if you don't mind cleaning up after yourself. If you look at jfruser's notes, he comments on increased leading as velocity and pressure increased, which is exactly what you'd expect. If you don't like cleaning lead out, then your high-speed loads either need to use jacketed bullets or gas-checked lead. This is my preference. I have shot fast cast loads, but don't like the mess of cleaning up. I now use lead only for stuff below 950 or so fps, and get basically no leading.

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