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Load data for .375 Weath. Mag. + .375 | 305gr | Hammer Stone Hammer

Recommended Powder(s): Alliant Reloder-17, Hodgdon H380, Hodgdon LVR, ReloadSwiss RS 62, Vihtavuori N550

.375 Weath. Mag. + .375 | 305gr | Hammer Stone Hammer

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:
.375 | 305gr | Hammer Stone Hammer
Manufacturer SKU:
37270SH
Bullet Weight:
305gr | 19.8g
Bullet Diameter:
0.375" | 9.52mm
Bullet Length:
<<locked>>
Caliber:
.375 Weath. Mag. load data
Case Length (l3):
2.850" | 72.4mm
Cartridge Length (C.O.L.):
<<locked>>
Seated Depth:
<<locked>>
Shank Seated Depth:
<<locked>>
Case Capacity:
105.0 Grains of Water | 6.82 cm³
Primer Size:
Large Rifle Magnum (LRM)
Max. allowed Pressure:
63817 psi | 4400 bar
LID:
LID_B12297_C568
Last updated:
2026-03-07
Recommended Twist Rate:
1:17 - 1:14

Load data for 216 loads in caliber .375 Weath. Mag. with .375 | 305gr | Hammer Stone Hammer bullet and 108 powders such as Alliant Reloder-17, Hodgdon H380, Hodgdon LVR, ReloadSwiss RS 62, Vihtavuori N550. 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".

  • No data yet

  • We recommend you limit powder range to relevant brands to speed up re-calculation of results

    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.

    .

    Loading_icon.gif

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 2206H
<<locked>>
87%
57319
90%
**30
100%
ADI AR 2208
<<locked>>
92%
57101
89%
**20
100%
[ADI AR 2209]*
<<locked>>
97%
44875
70%
**08
94%
ADI Benchmark 8208
<<locked>>
85%
57058
89%
**93
100%
Accurate 2015
<<locked>>
83%
57130
90%
**11
100%
Accurate 2200
<<locked>>
85%
57029
89%
**00
100%
Accurate 2495
<<locked>>
85%
57072
89%
**74
100%
Accurate 2520
<<locked>>
85%
57159
90%
**07
100%
Accurate 2700
<<locked>>
93%
57377
90%
**74
98%
Accurate 3100
<<locked>>
97%
37550
59%
**83
96%
Accurate 4064
<<locked>>
91%
56913
89%
**00
100%
Accurate 4350
<<locked>>
97%
52402
82%
**26
100%
Alliant AR-Comp
<<locked>>
85%
56608
89%
**44
100%
Alliant Power Pro 2000-MR
<<locked>>
89%
57377
90%
**48
100%
Alliant Reloder- TS 15.5
<<locked>>
92%
56898
89%
**33
100%
Alliant Reloder-15
<<locked>>
90%
57435
90%
**52
100%
Alliant Reloder-16
<<locked>>
97%
50604
79%
**36
100%
Alliant Reloder-17 👍
<<locked>>
96%
57319
90%
**44
100%
Alliant Reloder-19
<<locked>>
97%
43976
69%
**05
95%
[Alliant Reloder-22]*
<<locked>>
97%
38363
60%
**39
93%
Alliant Reloder-23
<<locked>>
97%
36216
57%
**06
99%
[Alliant Reloder-25]*
<<locked>>
97%
31952
50%
**01
93%
Alliant Reloder-26
<<locked>>
97%
39682
62%
**38
98%
Baschieri & Pellagri 107
<<locked>>
87%
57406
90%
**56
100%
Bofors RP3
<<locked>>
92%
56898
89%
**43
100%
[Bofors RP5]*
<<locked>>
97%
38363
60%
**39
93%
Bofors RP7
<<locked>>
96%
56840
89%
**20
98%
Hodgdon BL-C2
<<locked>>
85%
57029
89%
**39
100%
Hodgdon Benchmark
<<locked>>
85%
57232
90%
**54
100%
Hodgdon CFE223
<<locked>>
90%
57174
90%
**89
100%
Hodgdon H322
<<locked>>
84%
57377
90%
**74
100%
Hodgdon H380 👍
<<locked>>
91%
57101
89%
**43
100%
Hodgdon H414
<<locked>>
95%
56724
89%
**98
99%
Hodgdon H4350
<<locked>>
97%
48936
77%
**25
97%
Hodgdon H4895
<<locked>>
87%
57072
89%
**30
100%
Hodgdon Hybrid 100V
<<locked>>
97%
47036
74%
**28
100%
Hodgdon LVR 👍
<<locked>>
97%
56275
88%
**75
100%
Hodgdon Superperformance
<<locked>>
97%
56463
88%
**21
98%
Hodgdon VARGET
<<locked>>
93%
57101
89%
**20
100%
IMR 3031
<<locked>>
89%
57101
89%
**07
100%
IMR 4064
<<locked>>
93%
57116
89%
**07
100%
IMR 4166 Enduron
<<locked>>
93%
56855
89%
**87
99%
IMR 4350
<<locked>>
97%
51822
81%
**70
98%
IMR 4451 Enduron
<<locked>>
95%
57305
90%
**23
99%
IMR 4831
<<locked>>
97%
44715
70%
**02
99%
IMR 4895
<<locked>>
89%
57276
90%
**59
100%
[IMR 4955 Enduron]*
<<locked>>
97%
41989
66%
**03
91%
IMR 8208 XBR
<<locked>>
85%
57058
89%
**93
100%
Lovex D073.6
<<locked>>
87%
57159
90%
**07
100%
Lovex S060
<<locked>>
87%
57290
90%
**70
100%
Lovex S062
<<locked>>
91%
56913
89%
**00
100%
Lovex S065
<<locked>>
97%
56043
88%
**10
99%
Lovex S070
<<locked>>
97%
53809
84%
**03
99%
[Lovex S071]*
<<locked>>
97%
31372
49%
**52
93%
Norma 201
<<locked>>
87%
56768
89%
**87
100%
Norma 202
<<locked>>
87%
57290
90%
**87
100%
Norma 203B
<<locked>>
90%
57232
90%
**49
100%
Norma 204
<<locked>>
97%
52547
82%
**13
96%
Norma MRP
<<locked>>
97%
40321
63%
**11
95%
Norma URP
<<locked>>
97%
51779
81%
**20
100%
Ramshot Big Game
<<locked>>
90%
56724
89%
**62
100%
[Ramshot Grand]*
<<locked>>
97%
42917
67%
**08
92%
Ramshot Hunter
<<locked>>
97%
50865
80%
**26
99%
[Ramshot Magnum]*
<<locked>>
97%
36854
58%
**77
92%
Ramshot TAC
<<locked>>
85%
57159
90%
**13
100%
Ramshot Wild Boar
<<locked>>
85%
56826
89%
**30
100%
ReloadSwiss RS 14
<<locked>>
97%
34795
55%
**09
100%
ReloadSwiss RS 50
<<locked>>
91%
57406
90%
**30
99%
ReloadSwiss RS 52
<<locked>>
87%
56797
89%
**95
100%
ReloadSwiss RS 60
<<locked>>
94%
57305
90%
**38
100%
ReloadSwiss RS 62 👍
<<locked>>
97%
52533
82%
**62
100%
ReloadSwiss RS 70
<<locked>>
97%
51996
81%
**79
100%
Rottweil R 901
<<locked>>
85%
57348
90%
**61
100%
Rottweil R 902
<<locked>>
90%
57377
90%
**90
100%
Rottweil R 903
<<locked>>
94%
57174
90%
**39
100%
[Rottweil R 904]*
<<locked>>
97%
46702
73%
**92
94%
[Rottweil R 905]*
<<locked>>
97%
42467
67%
**79
94%
Rottweil R 907
<<locked>>
96%
56840
89%
**20
98%
SNPE Vectan SP 11
<<locked>>
93%
57159
90%
**72
100%
SNPE Vectan SP 7
<<locked>>
86%
57276
90%
**20
100%
SNPE Vectan SP 9
<<locked>>
88%
57043
89%
**26
100%
SNPE Vectan Tubal 3000
<<locked>>
87%
57290
90%
**11
100%
SNPE Vectan Tubal 5000
<<locked>>
93%
57145
90%
**11
100%
SNPE Vectan Tubal 7000
<<locked>>
97%
56681
89%
**74
99%
Shooters World Long Rifle
<<locked>>
97%
56043
88%
**10
99%
Shooters World Match Rifle
<<locked>>
87%
57159
90%
**07
100%
Shooters World Precision
<<locked>>
91%
56913
89%
**00
100%
Somchem S335
<<locked>>
87%
56927
89%
**18
100%
Somchem S341
<<locked>>
86%
57174
90%
**10
100%
Somchem S355
<<locked>>
94%
56971
89%
**30
100%
[Somchem S361]*
<<locked>>
97%
48037
75%
**85
93%
Somchem S365
<<locked>>
97%
46412
73%
**80
100%
Somchem S385
<<locked>>
97%
43439
68%
**75
96%
Vihtavuori N130
<<locked>>
84%
57130
90%
**82
100%
Vihtavuori N133
<<locked>>
89%
56811
89%
**92
100%
Vihtavuori N135
<<locked>>
95%
57232
90%
**54
100%
Vihtavuori N140
<<locked>>
89%
57072
89%
**57
100%
Vihtavuori N150
<<locked>>
97%
52968
83%
**44
100%
Vihtavuori N160
<<locked>>
97%
56840
89%
**43
100%
[Vihtavuori N165]*
<<locked>>
97%
36303
57%
**28
92%
Vihtavuori N530
<<locked>>
84%
57334
90%
**07
100%
Vihtavuori N540
<<locked>>
89%
56768
89%
**90
100%
Vihtavuori N550 👍
<<locked>>
97%
57276
90%
**92
100%
Vihtavuori N555
<<locked>>
97%
39305
62%
**69
99%
Winchester 6.5 StaBALL
<<locked>>
97%
54766
86%
**07
100%
Winchester 760
<<locked>>
95%
56724
89%
**98
99%
Winchester StaBALL HD
<<locked>>
97%
32416
51%
**10
99%
Winchester Supreme 780
<<locked>>
97%
45165
71%
**85
95%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
ADI AR 2206H
<<locked>>
81%
47630
75%
**92
100%
ADI AR 2208
<<locked>>
81%
40495
63%
**67
99%
[ADI AR 2209]*
<<locked>>
88%
34272
54%
**95
90%
ADI Benchmark 8208
<<locked>>
81%
49763
78%
**98
100%
Accurate 2015
<<locked>>
81%
53737
84%
**75
100%
Accurate 2200
<<locked>>
81%
49719
78%
**98
99%
Accurate 2495
<<locked>>
81%
49617
78%
**79
100%
Accurate 2520
<<locked>>
81%
49966
78%
**18
100%
[Accurate 2700]*
<<locked>>
81%
38812
61%
**88
94%
[Accurate 3100]*
<<locked>>
86%
25831
40%
**14
90%
Accurate 4064
<<locked>>
81%
41843
66%
**93
100%
Accurate 4350
<<locked>>
81%
30661
48%
**49
95%
Alliant AR-Comp
<<locked>>
81%
50343
79%
**75
100%
Alliant Power Pro 2000-MR
<<locked>>
81%
43410
68%
**34
99%
Alliant Reloder- TS 15.5
<<locked>>
81%
40161
63%
**87
100%
Alliant Reloder-15
<<locked>>
81%
43120
68%
**43
99%
Alliant Reloder-16
<<locked>>
81%
31212
49%
**56
95%
Alliant Reloder-17
<<locked>>
81%
34635
54%
**67
98%
[Alliant Reloder-19]*
<<locked>>
88%
33794
53%
**95
90%
[Alliant Reloder-22]*
<<locked>>
93%
33634
53%
**31
90%
[Alliant Reloder-23]*
<<locked>>
81%
22568
35%
**36
91%
[Alliant Reloder-25]*
<<locked>>
92%
27731
43%
**87
90%
[Alliant Reloder-26]*
<<locked>>
84%
25904
41%
**80
90%
Baschieri & Pellagri 107
<<locked>>
81%
46673
73%
**98
99%
Bofors RP3
<<locked>>
81%
39798
62%
**90
100%
[Bofors RP5]*
<<locked>>
93%
33634
53%
**31
90%
[Bofors RP7]*
<<locked>>
81%
35984
56%
**69
93%
Hodgdon BL-C2
<<locked>>
81%
49342
77%
**44
100%
Hodgdon Benchmark
<<locked>>
81%
51358
80%
**75
100%
Hodgdon CFE223
<<locked>>
81%
41292
65%
**52
99%
Hodgdon H322
<<locked>>
81%
53069
83%
**21
100%
Hodgdon H380
<<locked>>
81%
40828
64%
**00
98%
[Hodgdon H414]*
<<locked>>
81%
35708
56%
**47
94%
[Hodgdon H4350]*
<<locked>>
81%
30385
48%
**70
90%
Hodgdon H4895
<<locked>>
81%
48066
75%
**05
100%
Hodgdon Hybrid 100V
<<locked>>
81%
28543
45%
**67
96%
Hodgdon LVR
<<locked>>
81%
33765
53%
**95
95%
[Hodgdon Superperformance]*
<<locked>>
81%
32300
51%
**78
91%
Hodgdon VARGET
<<locked>>
81%
40118
63%
**57
99%
IMR 3031
<<locked>>
81%
44063
69%
**36
100%
IMR 4064
<<locked>>
81%
39653
62%
**44
99%
IMR 4166 Enduron
<<locked>>
81%
39421
62%
**15
95%
[IMR 4350]*
<<locked>>
81%
31763
50%
**00
91%
[IMR 4451 Enduron]*
<<locked>>
81%
37463
59%
**05
94%
[IMR 4831]*
<<locked>>
81%
27064
42%
**41
93%
IMR 4895
<<locked>>
81%
44237
69%
**69
100%
[IMR 4955 Enduron]*
<<locked>>
94%
38711
61%
**41
90%
IMR 8208 XBR
<<locked>>
81%
49763
78%
**98
100%
Lovex D073.6
<<locked>>
81%
46731
73%
**72
100%
Lovex S060
<<locked>>
81%
47311
74%
**33
100%
Lovex S062
<<locked>>
81%
42206
66%
**93
100%
Lovex S065
<<locked>>
81%
34867
55%
**59
95%
[Lovex S070]*
<<locked>>
81%
33069
52%
**39
93%
[Lovex S071]*
<<locked>>
90%
25715
40%
**11
90%
Norma 201
<<locked>>
81%
46659
73%
**49
100%
Norma 202
<<locked>>
81%
46847
73%
**52
100%
Norma 203B
<<locked>>
81%
42627
67%
**33
99%
[Norma 204]*
<<locked>>
84%
33837
53%
**75
90%
[Norma MRP]*
<<locked>>
89%
30821
48%
**85
90%
Norma URP
<<locked>>
81%
31067
49%
**46
95%
Ramshot Big Game
<<locked>>
81%
42032
66%
**43
99%
[Ramshot Grand]*
<<locked>>
94%
38885
61%
**26
90%
[Ramshot Hunter]*
<<locked>>
81%
30443
48%
**29
92%
[Ramshot Magnum]*
<<locked>>
94%
33765
53%
**11
90%
Ramshot TAC
<<locked>>
81%
49472
78%
**08
99%
Ramshot Wild Boar
<<locked>>
81%
49226
77%
**25
100%
ReloadSwiss RS 14
<<locked>>
93%
33243
52%
**83
100%
ReloadSwiss RS 50
<<locked>>
81%
41017
64%
**80
96%
ReloadSwiss RS 52
<<locked>>
81%
45469
71%
**38
99%
ReloadSwiss RS 60
<<locked>>
81%
36840
58%
**20
100%
ReloadSwiss RS 62
<<locked>>
81%
30385
48%
**59
95%
[ReloadSwiss RS 70]*
<<locked>>
81%
30589
48%
**56
93%
Rottweil R 901
<<locked>>
81%
50662
79%
**72
100%
Rottweil R 902
<<locked>>
81%
44396
70%
**06
100%
Rottweil R 903
<<locked>>
81%
37594
59%
**41
99%
[Rottweil R 904]*
<<locked>>
89%
36854
58%
**15
90%
[Rottweil R 905]*
<<locked>>
88%
32576
51%
**75
90%
[Rottweil R 907]*
<<locked>>
81%
35984
56%
**69
93%
SNPE Vectan SP 11
<<locked>>
81%
38421
60%
**83
99%
SNPE Vectan SP 7
<<locked>>
81%
48167
75%
**92
99%
SNPE Vectan SP 9
<<locked>>
81%
45832
72%
**65
100%
SNPE Vectan Tubal 3000
<<locked>>
81%
47979
75%
**97
100%
SNPE Vectan Tubal 5000
<<locked>>
81%
39871
62%
**82
100%
[SNPE Vectan Tubal 7000]*
<<locked>>
81%
34040
53%
**10
93%
Shooters World Long Rifle
<<locked>>
81%
34867
55%
**59
95%
Shooters World Match Rifle
<<locked>>
81%
46731
73%
**72
100%
Shooters World Precision
<<locked>>
81%
42206
66%
**93
100%
Somchem S335
<<locked>>
81%
47601
75%
**00
100%
Somchem S341
<<locked>>
81%
47616
75%
**85
100%
Somchem S355
<<locked>>
81%
38334
60%
**47
99%
[Somchem S361]*
<<locked>>
91%
40132
63%
**54
90%
Somchem S365
<<locked>>
81%
27731
43%
**03
97%
[Somchem S385]*
<<locked>>
85%
29776
47%
**96
90%
Vihtavuori N130
<<locked>>
81%
53156
83%
**33
100%
Vihtavuori N133
<<locked>>
81%
45324
71%
**47
100%
Vihtavuori N135
<<locked>>
81%
37434
59%
**82
100%
Vihtavuori N140
<<locked>>
81%
44034
69%
**87
100%
Vihtavuori N150
<<locked>>
81%
32634
51%
**16
99%
Vihtavuori N160
<<locked>>
81%
33678
53%
**72
96%
[Vihtavuori N165]*
<<locked>>
92%
31676
50%
**26
90%
Vihtavuori N530
<<locked>>
81%
52547
82%
**41
100%
Vihtavuori N540
<<locked>>
81%
43453
68%
**06
100%
Vihtavuori N550
<<locked>>
81%
34316
54%
**15
96%
[Vihtavuori N555]*
<<locked>>
81%
23844
37%
**01
92%
Winchester 6.5 StaBALL
<<locked>>
81%
32155
50%
**26
98%
[Winchester 760]*
<<locked>>
81%
35708
56%
**47
94%
[Winchester StaBALL HD]*
<<locked>>
85%
22495
35%
**75
90%
[Winchester Supreme 780]*
<<locked>>
88%
33620
53%
**69
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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