.300wsm/IMR4350/TSX

[blargon]

Does anyone use IMR4350 for .300wsm loads? I want to try some 165g TSX with this powder, but can't find any min/max loads for it, just for H4350.

thanks

 

[Silverado]

Closest I can find is for the 180gr Swift Scirocco: 61gr min, 65gr (c) max.

They also list for the 150gr Speer Grandslam: 64gr min, 68gr max.

I'd work from there.

 

[Lefty Dick]

Use a safe starting load for H4350, and start off with your IMR4350, work up in 1/2grain increments, establish accuracy first, 100fps is'nt gonna matter in any practical field application.
Of course watch for the usual signs of high pressure.

 

[Jarrett]

I've used the IMR 4350 in my .300WSM with good results for 180 bullets. My best results with the 168 gr TSX has been with RL 15. I have a Barnes page here I got somwhere on the web that I'll PM to you if I can attached it? Shows loads for 165 TSX with IMR 4350...

 

[joe-nwt]

Not TSX, but perhaps some data to start with. From a PDF of some IMR data I saved from the short mag site I think.​

300 Winchester Short Magnum​

WIN. CASE; FED. 215 PR​

NOSLER 150 GR. PARTITION
.308" DIA.; 24" BBL.; 2.860" C.O.L.
IMR Powder Charge (grains) Velocity (ft/sec) Chamber Press (psi)
IMR 4350 68.8 3240 62000
IMR 4831 70.0c 3230 62000
.WIN. CASE; FED. 215 PR
NOSLER 165 GR. PARTITION
.308" DIA.; 24" BBL.; 2.860" C.O.L.
IMR Powder Charge (grains) Velocity (ft/sec) Chamber Press (psi)
IMR 4350 65.5 3080 62000
IMR 4831 67.0 3070 62000
WIN. CASE; FED. 215 PR
NOSLER 180 GR. BALLISTIC TIP
.308" DIA.; 24" BBL.; 2.860" C.O.L.
IMR Powder Charge (grains) Velocity (ft/sec) Chamber Press (psi)
IMR 4350 65.0 2970 62000
IMR 4831 65.6c 2940 62000
WIN. CASE; FED. 215 PR
SPEER 200 GR. GRAND SLAM
.308" DIA.; 24" BBL.; 2.860" C.O.L.
IMR Powder Charge (grains) Velocity (ft/sec) Chamber Press (psi)
IMR 4350 60.0 2740 62000
IMR 4831 61.1 2722 62000​

Velocity and pressure readings represent average values​

obtained under controlled conditions. The values shown may vary
substantially with the components and the reloading techniques
employed. We suggest the charge weights shown be reduced
initally by 10% to compensate for possible variations from the
published data. The loads may then be increased as pressure
indications permit.​

 

[tilo]

Imr 4350

I use the IMR 4350 in my T3 300 WSM. I got pretty good groups (less than 1") with 67.5 grains. I used the load data from Barnes reloading book for the 165 grain XBT. Their book recommends to start at 61.0 to a max of 66.0. But the TSX has a lower pressure. Speed for the load averaged 3020 fps.

 

[daniellybbert]

Imr 4350 165 grn tsx starting load: 61.0grn = 2889 fps
max load: 68.0grn = 3148 fps with a load density of 105%
if you work up your loads you can probably get more fps and load a bit hotter
if its accurate

 

[Silverado]

From Barnes Manual #4 (Online in the Copper Club)

Bullet Weight: 165 gr Case Trim Length: 2.090"
Bullet Style: TSX BT Primer: Federal GM215M
COAL: 2.820" Barrel Length: 24"
Case: Winchester Twist Rate: 1:10"
Bullet Weight: 168 gr Case Trim Length: 2.090"
Bullet Style: TSX BT Primer: Federal GM215M
COAL: 2.840" Barrel Length: 24"
Case: Winchester Twist Rate: 1:10"
Charge Velocity Charge Velocity Load
Powder (grains) (fps) (grains) (fps) Density (%)
H4895 50.0 2745 55.5 2976 84
Varget 52.5 2820 58.0 3022 88
IMR 4064 54.0 2843 58.0 3027 92
AA2520 55.5 2823 60.5 3048 82
IMR 4320 55.0 2826 60.0 3045 89
Big Game 59.0 2888 64.5 3094 95
♦ RL 15 53.0 2831 58.5 3060 89
H380 59.5 2847 64.0 3053 91
Win 760 60.5 2898 65.0 3101 89
H414 60.5 2905 65.0 3089 89
IMR 4350 61.0 2889 68.0 3148 105
Bullet Weight: 180 gr Case Trim Length: 2.090"
Bullet Style: MRX BT Primer: Federal GM215M
COAL: 2.850" Barrel Length: 24"
Case: Winchester Twist Rate: 1:10"
Bullet Weight: 180 gr Case Trim Length: 2.090"
Bullet Style: TSX BT Primer: Federal GM215M
COAL: 2.825" Barrel Length: 24"
Case: Winchester Twist Rate: 1:10"
Charge Velocity Charge Velocity Load
Powder (grains) (fps) (grains) (fps) Density (%)
IMR 4320 52.5 2656 57.5 2865 87
Big Game 55.5 2699 62.0 2943 93
RL 15 51.0 2674 56.0 2875 87
H380 56.0 2693 61.0 2894 89
Win 760 57.5 2697 62.5 2935 88
H414 57.5 2705 62.5 2940 88
IMR 4350 57.5 2723 65.5 3003 103
♦ RL 19 62.5 2771 69.5 3036 107
IMR 7828SSC 63.5 2734 70.0 2986 103
Minimum Maximum
Minimum Maximum