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Load data for .257 Roberts + .257 | 120gr | Winchester Soft-Point

Recommended Powder(s): Accurate 4350, Alliant Reloder-16, Norma URP, ReloadSwiss RS 62, Somchem S365

.257 Roberts + .257 | 120gr | Winchester Soft-Point

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:
.257 | 120gr | Winchester Soft-Point
Bullet Weight:
120gr | 7.8g
Bullet Diameter:
0.257" | 6.53mm
Bullet Length:
1.000" | 25.4mm
Caliber:
.257 Roberts load data
Case Length (l3):
2.233" | 56.7mm
Cartridge Length (C.O.L.):
2.733" | 69.4mm
Seated Depth:
0.500" | 12.7mm
Shank Seated Depth:
0.500" | 12.7mm
Case Capacity:
56.0 Grains of Water | 3.64 cm³
Primer Size:
Large Rifle (LR)
Max. allowed Pressure:
51488 psi | 3550 bar
LID:
LID_B6613_C241
Last updated:
2025-01-01

Load data for 124 loads in caliber .257 Roberts with .257 | 120gr | Winchester Soft-Point bullet and 62 powders such as Accurate 4350, Alliant Reloder-16, Norma URP, ReloadSwiss RS 62, Somchem S365. The key underlying parameters are shown in the table above.

  • Important Notice: DO NOT go below Minimum Charge or above Maximum Charge unless there are reasons. Since xxlreloading.com has no control over the equipment and components used by the customer and the data used in connection with the website, any responsibility and liability for the results achieved is rejected. Also see our Terms of Service

    Questions regarding the load data: Please read the information in the next tab "Explanations".

  • Muzzle velocity vs. barrel length

    Every 1 inch additional barrel length increases muzzle velocity by approx. 31.2 fps

  • .

    Use the Personalized Load Calculator to customize loads to your own specific requirements. Find more details in the help section.

    Our default view only displays powders/loads that fulfill certain criteria: Max pressure of a load <=90% of Max. Standardized Pressure. Fill Rate (Min FR): >80% and <100% for rife loads,  >60% and <100% for pistol loads. Min. Propellant Combustion (Min z): >90% for rifle loads , >80% for pistol/revolver loads. Relax these criteria at your own risk to potentially get more powders shown in the load tables.

Click on the desired row in the tables below to add a specific load / powder to your Diary and manage there.

Powder
Charge
FR
MaxP
%
V(0)
z
ADI AR 2208
<<locked>>
83%
46122
90%
**71
99%
ADI AR 2209
<<locked>>
95%
45687
89%
**33
95%
[ADI AR 2213]*
<<locked>>
96%
43395
84%
**97
92%
Accurate 2700
<<locked>>
84%
45513
88%
**05
96%
Accurate 3100
<<locked>>
96%
41539
81%
**38
97%
Accurate 4350 👍
<<locked>>
90%
45629
89%
**33
99%
Alliant Reloder- TS 15.5
<<locked>>
83%
46180
90%
**87
100%
Alliant Reloder-16 👍
<<locked>>
91%
45687
89%
**66
99%
Alliant Reloder-17
<<locked>>
87%
46108
90%
**99
100%
Alliant Reloder-19
<<locked>>
95%
45759
89%
**40
95%
[Alliant Reloder-22]*
<<locked>>
96%
41814
81%
**07
94%
Alliant Reloder-23
<<locked>>
97%
40176
78%
**77
99%
Alliant Reloder-25
<<locked>>
97%
35114
68%
**62
95%
Alliant Reloder-26
<<locked>>
97%
44585
87%
**41
99%
Hodgdon H414
<<locked>>
85%
45730
89%
**40
97%
Hodgdon H4350
<<locked>>
92%
46224
90%
**84
96%
[Hodgdon H4831 SC]*
<<locked>>
96%
45484
88%
**97
92%
Hodgdon Hybrid 100V
<<locked>>
93%
46006
89%
**17
100%
Hodgdon LVR
<<locked>>
88%
45774
89%
**23
98%
Hodgdon Superperformance
<<locked>>
88%
45498
88%
**62
96%
Hodgdon VARGET
<<locked>>
83%
46122
90%
**71
99%
Hodgdon TrailBoss
<<locked>>
95%
33881
66%
**99
100%
IMR 4064
<<locked>>
83%
45455
88%
**44
99%
IMR 4166 Enduron
<<locked>>
84%
45759
89%
**28
97%
IMR 4350
<<locked>>
90%
45498
88%
**74
96%
IMR 4451 Enduron
<<locked>>
85%
45556
88%
**57
97%
IMR 4831
<<locked>>
94%
45585
89%
**20
99%
[IMR 4955 Enduron]*
<<locked>>
96%
45382
88%
**67
93%
[IMR 7828 SSC]*
<<locked>>
97%
44976
87%
**49
93%
Lovex S065
<<locked>>
87%
45469
88%
**61
98%
Lovex S070
<<locked>>
89%
45469
88%
**77
97%
[Lovex S071]*
<<locked>>
97%
34940
68%
**93
94%
Norma 204
<<locked>>
90%
45730
89%
**10
95%
Norma MRP
<<locked>>
97%
44280
86%
**85
96%
Norma URP 👍
<<locked>>
90%
45672
89%
**30
99%
Ramshot Hunter
<<locked>>
91%
45658
89%
**46
98%
[Ramshot Magnum]*
<<locked>>
97%
40553
79%
**48
94%
ReloadSwiss RS 14
<<locked>>
97%
34998
68%
**52
100%
ReloadSwiss RS 60
<<locked>>
87%
45542
88%
**05
100%
ReloadSwiss RS 62 👍
<<locked>>
90%
46166
90%
**62
99%
ReloadSwiss RS 70
<<locked>>
91%
45977
89%
**99
99%
Rottweil R 903
<<locked>>
85%
45788
89%
**87
100%
[Rottweil R 904]*
<<locked>>
93%
45600
89%
**74
93%
Rottweil R 905
<<locked>>
96%
45513
88%
**36
95%
Rottweil R 907
<<locked>>
87%
46064
89%
**61
96%
SNPE Vectan SP 11
<<locked>>
84%
45701
89%
**10
100%
SNPE Vectan Tubal 5000
<<locked>>
83%
45716
89%
**72
100%
SNPE Vectan Tubal 7000
<<locked>>
88%
45919
89%
**21
97%
Shooters World Long Rifle
<<locked>>
87%
45469
88%
**61
98%
Somchem S355
<<locked>>
84%
46064
89%
**84
100%
[Somchem S361]*
<<locked>>
92%
45484
88%
**44
92%
Somchem S365 👍
<<locked>>
93%
45788
89%
**66
100%
Somchem S385
<<locked>>
95%
45252
88%
**03
96%
Vihtavuori N135
<<locked>>
85%
45266
88%
**02
100%
Vihtavuori N150
<<locked>>
89%
45455
88%
**38
100%
Vihtavuori N160
<<locked>>
88%
46079
90%
**00
99%
[Vihtavuori N165]*
<<locked>>
97%
39943
78%
**85
94%
Vihtavuori N550
<<locked>>
87%
45687
89%
**33
99%
Vihtavuori N555
<<locked>>
96%
43714
85%
**36
99%
Winchester 6.5 StaBALL
<<locked>>
89%
46340
90%
**87
100%
Winchester 760
<<locked>>
85%
45730
89%
**40
97%
Winchester StaBALL HD
<<locked>>
97%
35607
69%
**87
99%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
ADI AR 2208
<<locked>>
81%
43178
84%
**08
99%
[ADI AR 2209]*
<<locked>>
86%
35230
68%
**93
90%
[ADI AR 2213]*
<<locked>>
94%
39784
77%
**15
90%
Accurate 2700
<<locked>>
81%
41843
81%
**33
95%
[Accurate 3100]*
<<locked>>
84%
26731
52%
**83
90%
Accurate 4350
<<locked>>
81%
33620
65%
**84
96%
Alliant Reloder- TS 15.5
<<locked>>
81%
43337
84%
**35
100%
Alliant Reloder-16
<<locked>>
81%
33620
65%
**97
96%
Alliant Reloder-17
<<locked>>
81%
37840
73%
**25
99%
[Alliant Reloder-19]*
<<locked>>
86%
34664
67%
**87
90%
[Alliant Reloder-22]*
<<locked>>
90%
34548
67%
**30
90%
[Alliant Reloder-23]*
<<locked>>
81%
24497
48%
**44
93%
[Alliant Reloder-25]*
<<locked>>
90%
28442
55%
**65
90%
[Alliant Reloder-26]*
<<locked>>
82%
26252
51%
**46
90%
Hodgdon H414
<<locked>>
81%
39160
76%
**05
95%
[Hodgdon H4350]*
<<locked>>
81%
32619
63%
**95
91%
[Hodgdon H4831 SC]*
<<locked>>
93%
40756
79%
**98
90%
Hodgdon Hybrid 100V
<<locked>>
81%
31154
61%
**02
97%
Hodgdon LVR
<<locked>>
81%
36666
71%
**39
96%
[Hodgdon Superperformance]*
<<locked>>
81%
34998
68%
**30
92%
Hodgdon VARGET
<<locked>>
81%
43178
84%
**08
99%
Hodgdon TrailBoss
<<locked>>
89%
31067
60%
**47
100%
IMR 4064
<<locked>>
81%
42670
83%
**95
99%
IMR 4166 Enduron
<<locked>>
81%
42003
82%
**52
96%
[IMR 4350]*
<<locked>>
81%
34316
67%
**34
92%
IMR 4451 Enduron
<<locked>>
81%
39929
78%
**39
95%
[IMR 4831]*
<<locked>>
81%
29588
57%
**59
94%
[IMR 4955 Enduron]*
<<locked>>
92%
38957
76%
**33
90%
[IMR 7828 SSC]*
<<locked>>
93%
39465
77%
**21
90%
Lovex S065
<<locked>>
81%
37536
73%
**97
96%
[Lovex S070]*
<<locked>>
81%
35824
70%
**74
94%
[Lovex S071]*
<<locked>>
89%
27035
53%
**90
90%
[Norma 204]*
<<locked>>
82%
34360
67%
**67
90%
[Norma MRP]*
<<locked>>
86%
31372
61%
**67
90%
Norma URP
<<locked>>
81%
34055
66%
**87
96%
[Ramshot Hunter]*
<<locked>>
81%
33069
64%
**67
93%
[Ramshot Magnum]*
<<locked>>
92%
33881
66%
**84
90%
ReloadSwiss RS 14
<<locked>>
87%
30342
59%
**60
100%
ReloadSwiss RS 60
<<locked>>
81%
36593
71%
**15
99%
ReloadSwiss RS 62
<<locked>>
81%
33533
65%
**03
96%
[ReloadSwiss RS 70]*
<<locked>>
81%
33272
65%
**03
94%
Rottweil R 903
<<locked>>
81%
40944
80%
**92
99%
[Rottweil R 904]*
<<locked>>
87%
37405
73%
**07
90%
[Rottweil R 905]*
<<locked>>
86%
33301
65%
**64
90%
[Rottweil R 907]*
<<locked>>
81%
38667
75%
**07
94%
SNPE Vectan SP 11
<<locked>>
81%
41974
82%
**41
99%
SNPE Vectan Tubal 5000
<<locked>>
81%
42641
83%
**13
100%
[SNPE Vectan Tubal 7000]*
<<locked>>
81%
36883
72%
**44
94%
Shooters World Long Rifle
<<locked>>
81%
37536
73%
**97
96%
Somchem S355
<<locked>>
81%
41394
80%
**95
99%
[Somchem S361]*
<<locked>>
89%
40147
78%
**36
90%
Somchem S365
<<locked>>
81%
30472
59%
**41
98%
[Somchem S385]*
<<locked>>
84%
31096
60%
**92
90%
Vihtavuori N135
<<locked>>
81%
40350
78%
**23
100%
Vihtavuori N150
<<locked>>
81%
35476
69%
**48
99%
Vihtavuori N160
<<locked>>
81%
36796
71%
**13
97%
[Vihtavuori N165]*
<<locked>>
91%
32822
64%
**18
90%
Vihtavuori N550
<<locked>>
81%
37565
73%
**66
97%
[Vihtavuori N555]*
<<locked>>
81%
26339
51%
**26
93%
Winchester 6.5 StaBALL
<<locked>>
81%
35172
68%
**64
98%
Winchester 760
<<locked>>
81%
39160
76%
**05
95%
[Winchester StaBALL HD]*
<<locked>>
83%
22931
45%
**31
90%

Start Load - Barrel Length: 23.60''

Any powder missing? Then click here.

FR ... fill rate of the cartridge in percent

MaxP ... max. pressure of load in psi or bar

% ... max. pressure of load in percent of the maximum allowed pressure for this caliber 

V(0) ... muzzle velocity in feet per second (fps) or  meters per second (m/s)

z ... powder burnt in percent

[...] *... not dangerous but load has suboptimal powder burnt with possible characteristics such as extensive muzzle flash or inaccurate loads.

[...] ²... fill rate low - you might want to consider using a filler to ensure proper ignition.

[...] ᴾ... possible press load - work up slowly to this load while watching for signs of excessive pressure.

👍  ... recommended powder/load for this caliber and bullet combination based on its ballistic performance.

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