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Load data for .338 Weatherby RPM + .338 | 300gr | Sierra HPBT LR MatchKing

Recommended Powder(s): Hodgdon H414, Hodgdon Superperformance, ReloadSwiss RS 62, ReloadSwiss RS 70, Winchester 760

.338 Weatherby RPM + .338 | 300gr | Sierra HPBT LR MatchKing

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:
.338 | 300gr | Sierra HPBT LR MatchKing
Manufacturer SKU:
9300
Bullet Weight:
300gr | 19.4g
Bullet Diameter:
0.338" | 8.59mm
Bullet Length:
<<locked>>
Caliber:
.338 Weatherby RPM load data
Case Length (l3):
2.550" | 64.8mm
Cartridge Length (C.O.L.):
<<locked>>
Seated Depth:
<<locked>>
Shank Seated Depth:
<<locked>>
Case Capacity:
81.6 Grains of Water | 5.30 cm³
Primer Size:
Large Rifle Magnum (LRM)
Max. allowed Pressure:
65000 psi | 4482 bar
LID:
LID_B5931_C455
Last updated:
2026-05-05
Recommended Twist Rate:
1:11 - 1:9

Load data for 222 loads in caliber .338 Weatherby RPM with .338 | 300gr | Sierra HPBT LR MatchKing bullet and 111 powders such as Hodgdon H414, Hodgdon Superperformance, ReloadSwiss RS 62, ReloadSwiss RS 70, Winchester 760. 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.

    .

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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>>
86%
58305
90%
**64
100%
ADI AR 2208
<<locked>>
92%
58479
90%
**54
100%
ADI AR 2209
<<locked>>
97%
47427
73%
**01
97%
[ADI AR 2213]*
<<locked>>
97%
41916
64%
**36
94%
ADI Benchmark 8208
<<locked>>
84%
57870
89%
**24
100%
Accurate 2200
<<locked>>
84%
57696
89%
**31
100%
Accurate 2495
<<locked>>
84%
58131
89%
**01
100%
Accurate 2520
<<locked>>
84%
57580
89%
**28
100%
Accurate 2700
<<locked>>
92%
57769
89%
**18
99%
Accurate 3100
<<locked>>
97%
40277
62%
**87
98%
Accurate 4064
<<locked>>
90%
57943
89%
**28
100%
Accurate 4350
<<locked>>
97%
55883
86%
**97
100%
Alliant AR-Comp
<<locked>>
84%
58450
90%
**78
100%
Alliant Power Pro 2000-MR
<<locked>>
88%
58233
90%
**72
100%
Alliant Reloder- TS 15.5
<<locked>>
91%
57827
89%
**60
100%
Alliant Reloder-15
<<locked>>
89%
57783
89%
**74
100%
Alliant Reloder-16
<<locked>>
97%
53127
82%
**97
100%
Alliant Reloder-17
<<locked>>
95%
58421
90%
**69
100%
Alliant Reloder-19
<<locked>>
97%
46456
71%
**95
97%
Alliant Reloder-22
<<locked>>
97%
40379
62%
**42
96%
Alliant Reloder-23
<<locked>>
97%
38856
60%
**19
100%
Alliant Reloder-25
<<locked>>
97%
33895
52%
**37
97%
Alliant Reloder-26
<<locked>>
97%
42105
65%
**38
100%
Baschieri & Pellagri 107
<<locked>>
86%
58015
89%
**83
100%
[Bofors RP15]*
<<locked>>
97%
37492
58%
**90
94%
Bofors RP3
<<locked>>
91%
57856
89%
**70
100%
Bofors RP5
<<locked>>
97%
40379
62%
**42
96%
Bofors RP7
<<locked>>
95%
57885
89%
**60
99%
Hodgdon BL-C2
<<locked>>
84%
57711
89%
**70
100%
Hodgdon Benchmark
<<locked>>
84%
58349
90%
**88
100%
Hodgdon H380
<<locked>>
90%
58407
90%
**83
100%
Hodgdon H414 👍
<<locked>>
94%
58407
90%
**43
100%
Hodgdon H4350
<<locked>>
97%
57435
88%
**90
99%
[Hodgdon H4831]*
<<locked>>
97%
38972
60%
**47
92%
[Hodgdon H4831 SC]*
<<locked>>
97%
44077
68%
**29
94%
Hodgdon H4895
<<locked>>
85%
57856
89%
**57
100%
Hodgdon Hybrid 100V
<<locked>>
97%
49937
77%
**98
100%
Hodgdon LVR
<<locked>>
96%
58479
90%
**20
100%
Hodgdon Superperformance 👍
<<locked>>
96%
57609
89%
**65
100%
Hodgdon VARGET
<<locked>>
89%
57986
89%
**44
100%
Hodgdon LEVERevolution
<<locked>>
89%
57580
89%
**90
100%
IMR 3031
<<locked>>
88%
57812
89%
**24
100%
IMR 4064
<<locked>>
92%
57841
89%
**38
100%
IMR 4166 Enduron
<<locked>>
92%
57711
89%
**31
100%
IMR 4350
<<locked>>
97%
54708
84%
**44
99%
IMR 4451 Enduron
<<locked>>
94%
57537
89%
**57
100%
IMR 4831
<<locked>>
97%
47239
73%
**82
100%
IMR 4895
<<locked>>
88%
58247
90%
**83
100%
[IMR 4955 Enduron]*
<<locked>>
97%
44701
69%
**13
94%
[IMR 7828 SSC]*
<<locked>>
97%
43207
66%
**69
94%
IMR 8208 XBR
<<locked>>
84%
57870
89%
**24
100%
Lovex D073.6
<<locked>>
86%
57986
89%
**34
100%
Lovex S060
<<locked>>
86%
58392
90%
**08
100%
Lovex S062
<<locked>>
90%
58349
90%
**38
100%
Lovex S065
<<locked>>
96%
57711
89%
**60
100%
Lovex S070
<<locked>>
97%
56449
87%
**67
100%
Lovex S071
<<locked>>
97%
33794
52%
**78
96%
Norma 201
<<locked>>
87%
57841
89%
**21
100%
Norma 202
<<locked>>
86%
57653
89%
**11
100%
Norma 203B
<<locked>>
89%
57798
89%
**74
100%
Norma 204
<<locked>>
97%
54752
84%
**83
98%
Norma MRP
<<locked>>
97%
42395
65%
**01
98%
Norma URP
<<locked>>
97%
54839
84%
**90
100%
Ramshot Big Game
<<locked>>
89%
58131
89%
**93
100%
Ramshot Grand
<<locked>>
97%
45455
70%
**18
95%
Ramshot Hunter
<<locked>>
97%
53185
82%
**90
100%
Ramshot Magnum
<<locked>>
97%
38827
60%
**96
95%
Ramshot TAC
<<locked>>
84%
58204
90%
**57
100%
Ramshot Wild Boar
<<locked>>
84%
58117
89%
**64
100%
ReloadSwiss RS 50
<<locked>>
90%
58305
90%
**70
100%
ReloadSwiss RS 52
<<locked>>
86%
57595
89%
**16
100%
ReloadSwiss RS 60
<<locked>>
93%
58059
89%
**59
100%
ReloadSwiss RS 62 👍
<<locked>>
97%
55883
86%
**23
100%
ReloadSwiss RS 70 👍
<<locked>>
97%
54491
84%
**46
100%
[ReloadSwiss RS 76]*
<<locked>>
97%
32518
50%
**28
93%
Rottweil R 901
<<locked>>
84%
57928
89%
**85
100%
Rottweil R 902
<<locked>>
88%
58146
89%
**15
100%
Rottweil R 903
<<locked>>
93%
58160
89%
**70
100%
Rottweil R 904
<<locked>>
97%
49226
76%
**82
96%
Rottweil R 905
<<locked>>
97%
45223
70%
**82
97%
Rottweil R 907
<<locked>>
95%
57885
89%
**60
99%
SNPE Vectan SP 11
<<locked>>
92%
58088
89%
**03
100%
SNPE Vectan SP 7
<<locked>>
85%
57725
89%
**47
100%
SNPE Vectan SP 9
<<locked>>
87%
57928
89%
**57
100%
SNPE Vectan Tubal 3000
<<locked>>
85%
57537
89%
**46
100%
SNPE Vectan Tubal 5000
<<locked>>
92%
58392
90%
**49
100%
SNPE Vectan Tubal 7000
<<locked>>
96%
57986
89%
**28
100%
Shooters World Long Rifle
<<locked>>
96%
57711
89%
**60
100%
Shooters World Match Rifle
<<locked>>
86%
57986
89%
**34
100%
Shooters World Precision
<<locked>>
90%
58349
90%
**38
100%
Somchem S335
<<locked>>
86%
57711
89%
**52
100%
Somchem S341
<<locked>>
85%
58160
89%
**47
100%
Somchem S355
<<locked>>
93%
57609
89%
**54
100%
Somchem S361
<<locked>>
97%
50241
77%
**72
95%
Somchem S365
<<locked>>
97%
49530
76%
**51
100%
Somchem S385
<<locked>>
97%
45498
70%
**62
98%
Vihtavuori N133
<<locked>>
85%
57827
89%
**26
100%
Vihtavuori N135
<<locked>>
90%
58465
90%
**85
100%
Vihtavuori N140
<<locked>>
88%
58117
89%
**92
100%
Vihtavuori N150
<<locked>>
94%
58204
90%
**24
100%
Vihtavuori N160
<<locked>>
97%
57217
88%
**80
100%
Vihtavuori N165
<<locked>>
97%
39581
61%
**57
96%
Vihtavuori N530
<<locked>>
84%
58044
89%
**18
100%
Vihtavuori N540
<<locked>>
89%
58494
90%
**21
100%
Vihtavuori N550
<<locked>>
97%
56188
86%
**90
100%
Vihtavuori N555
<<locked>>
96%
42105
65%
**62
100%
[Vihtavuori N560]*
<<locked>>
97%
43207
66%
**92
94%
Winchester 6.5 StaBALL
<<locked>>
97%
57493
88%
**64
100%
Winchester 760 👍
<<locked>>
94%
58407
90%
**43
100%
Winchester StaBALL HD
<<locked>>
97%
34040
52%
**26
100%
Winchester Supreme 780
<<locked>>
97%
47587
73%
**82
97%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
ADI AR 2206H
<<locked>>
81%
50183
77%
**62
100%
ADI AR 2208
<<locked>>
81%
42525
65%
**51
100%
[ADI AR 2209]*
<<locked>>
82%
29443
45%
**70
90%
[ADI AR 2213]*
<<locked>>
90%
34301
53%
**88
90%
ADI Benchmark 8208
<<locked>>
81%
52315
80%
**62
100%
Accurate 2200
<<locked>>
81%
52156
80%
**65
100%
Accurate 2495
<<locked>>
81%
52330
81%
**39
100%
Accurate 2520
<<locked>>
81%
52779
81%
**78
100%
Accurate 2700
<<locked>>
81%
40857
63%
**95
96%
[Accurate 3100]*
<<locked>>
81%
23873
37%
**62
92%
Accurate 4064
<<locked>>
81%
44193
68%
**70
100%
Accurate 4350
<<locked>>
81%
32982
51%
**65
98%
Alliant AR-Comp
<<locked>>
81%
53359
82%
**29
100%
Alliant Power Pro 2000-MR
<<locked>>
81%
45803
70%
**11
100%
Alliant Reloder- TS 15.5
<<locked>>
81%
42598
66%
**70
100%
Alliant Reloder-15
<<locked>>
81%
45600
70%
**23
100%
Alliant Reloder-16
<<locked>>
81%
33040
51%
**78
98%
Alliant Reloder-17
<<locked>>
81%
36637
56%
**67
100%
[Alliant Reloder-19]*
<<locked>>
81%
28790
44%
**60
90%
[Alliant Reloder-22]*
<<locked>>
86%
28906
44%
**03
90%
Alliant Reloder-23
<<locked>>
81%
23960
37%
**88
96%
[Alliant Reloder-25]*
<<locked>>
85%
23873
37%
**75
90%
[Alliant Reloder-26]*
<<locked>>
81%
24874
38%
**57
93%
Baschieri & Pellagri 107
<<locked>>
81%
49124
76%
**72
100%
[Bofors RP15]*
<<locked>>
89%
29254
45%
**09
90%
Bofors RP3
<<locked>>
81%
42395
65%
**80
100%
[Bofors RP5]*
<<locked>>
86%
28906
44%
**03
90%
Bofors RP7
<<locked>>
81%
37884
58%
**75
96%
Hodgdon BL-C2
<<locked>>
81%
52272
80%
**08
100%
Hodgdon Benchmark
<<locked>>
81%
53809
83%
**42
100%
Hodgdon H380
<<locked>>
81%
42931
66%
**83
99%
Hodgdon H414
<<locked>>
81%
38014
58%
**54
97%
[Hodgdon H4350]*
<<locked>>
81%
35244
54%
**59
94%
[Hodgdon H4831]*
<<locked>>
93%
34679
53%
**65
90%
[Hodgdon H4831 SC]*
<<locked>>
89%
34679
53%
**65
90%
Hodgdon H4895
<<locked>>
81%
50662
78%
**72
100%
Hodgdon Hybrid 100V
<<locked>>
81%
30458
47%
**93
99%
Hodgdon LVR
<<locked>>
81%
35911
55%
**05
98%
Hodgdon Superperformance
<<locked>>
81%
34026
52%
**01
95%
Hodgdon VARGET
<<locked>>
81%
44904
69%
**83
100%
Hodgdon LEVERevolution
<<locked>>
81%
43859
67%
**23
100%
IMR 3031
<<locked>>
81%
46572
72%
**96
100%
IMR 4064
<<locked>>
81%
41684
64%
**31
100%
IMR 4166 Enduron
<<locked>>
81%
41437
64%
**08
97%
[IMR 4350]*
<<locked>>
81%
33576
52%
**19
94%
IMR 4451 Enduron
<<locked>>
81%
39378
61%
**05
97%
IMR 4831
<<locked>>
81%
29008
45%
**70
97%
IMR 4895
<<locked>>
81%
46804
72%
**46
100%
[IMR 4955 Enduron]*
<<locked>>
87%
33127
51%
**06
90%
[IMR 7828 SSC]*
<<locked>>
89%
33489
52%
**85
90%
IMR 8208 XBR
<<locked>>
81%
52315
80%
**62
100%
Lovex D073.6
<<locked>>
81%
49748
77%
**42
100%
Lovex S060
<<locked>>
81%
49414
76%
**00
100%
Lovex S062
<<locked>>
81%
44556
69%
**70
100%
Lovex S065
<<locked>>
81%
36767
57%
**62
97%
Lovex S070
<<locked>>
81%
34882
54%
**49
96%
[Lovex S071]*
<<locked>>
83%
21959
34%
**09
90%
Norma 201
<<locked>>
81%
48863
75%
**16
100%
Norma 202
<<locked>>
81%
49472
76%
**19
100%
Norma 203B
<<locked>>
81%
44962
69%
**13
100%
[Norma 204]*
<<locked>>
81%
32663
50%
**32
92%
[Norma MRP]*
<<locked>>
82%
26150
40%
**54
90%
Norma URP
<<locked>>
81%
32938
51%
**59
98%
Ramshot Big Game
<<locked>>
81%
44570
69%
**33
100%
[Ramshot Grand]*
<<locked>>
88%
33692
52%
**98
90%
Ramshot Hunter
<<locked>>
81%
32097
49%
**49
95%
[Ramshot Magnum]*
<<locked>>
88%
28442
44%
**80
90%
Ramshot TAC
<<locked>>
81%
51822
80%
**82
100%
Ramshot Wild Boar
<<locked>>
81%
51692
80%
**92
100%
ReloadSwiss RS 50
<<locked>>
81%
43236
67%
**73
98%
ReloadSwiss RS 52
<<locked>>
81%
48153
74%
**05
100%
ReloadSwiss RS 60
<<locked>>
81%
39102
60%
**10
100%
ReloadSwiss RS 62
<<locked>>
81%
32358
50%
**78
97%
ReloadSwiss RS 70
<<locked>>
81%
32227
50%
**78
97%
[ReloadSwiss RS 76]*
<<locked>>
93%
29008
45%
**39
90%
Rottweil R 901
<<locked>>
81%
53417
82%
**36
100%
Rottweil R 902
<<locked>>
81%
46746
72%
**83
100%
Rottweil R 903
<<locked>>
81%
39798
61%
**34
100%
[Rottweil R 904]*
<<locked>>
83%
31546
49%
**83
90%
[Rottweil R 905]*
<<locked>>
82%
28355
44%
**64
90%
Rottweil R 907
<<locked>>
81%
37884
58%
**75
96%
SNPE Vectan SP 11
<<locked>>
81%
40727
63%
**77
100%
SNPE Vectan SP 7
<<locked>>
81%
50328
77%
**62
100%
SNPE Vectan SP 9
<<locked>>
81%
48196
74%
**39
100%
SNPE Vectan Tubal 3000
<<locked>>
81%
50140
77%
**64
100%
SNPE Vectan Tubal 5000
<<locked>>
81%
41887
64%
**65
100%
SNPE Vectan Tubal 7000
<<locked>>
81%
35868
55%
**19
96%
Shooters World Long Rifle
<<locked>>
81%
36767
57%
**62
97%
Shooters World Match Rifle
<<locked>>
81%
49748
77%
**42
100%
Shooters World Precision
<<locked>>
81%
44556
69%
**70
100%
Somchem S335
<<locked>>
81%
49705
76%
**64
100%
Somchem S341
<<locked>>
81%
49966
77%
**52
100%
Somchem S355
<<locked>>
81%
40495
62%
**37
100%
[Somchem S361]*
<<locked>>
85%
33881
52%
**13
90%
Somchem S365
<<locked>>
81%
29689
46%
**29
99%
[Somchem S385]*
<<locked>>
81%
27746
43%
**37
92%
Vihtavuori N133
<<locked>>
81%
50488
78%
**51
100%
Vihtavuori N135
<<locked>>
81%
44077
68%
**28
100%
Vihtavuori N140
<<locked>>
81%
46818
72%
**64
100%
Vihtavuori N150
<<locked>>
81%
38493
59%
**82
100%
Vihtavuori N160
<<locked>>
81%
34563
53%
**62
98%
[Vihtavuori N165]*
<<locked>>
85%
27398
42%
**14
90%
Vihtavuori N530
<<locked>>
81%
52489
81%
**59
100%
Vihtavuori N540
<<locked>>
81%
44904
69%
**64
100%
Vihtavuori N550
<<locked>>
81%
33910
52%
**65
98%
Vihtavuori N555
<<locked>>
81%
25527
39%
**44
96%
[Vihtavuori N560]*
<<locked>>
89%
34272
53%
**21
90%
Winchester 6.5 StaBALL
<<locked>>
81%
33837
52%
**42
99%
Winchester 760
<<locked>>
81%
38014
58%
**54
97%
[Winchester StaBALL HD]*
<<locked>>
81%
20871
32%
**42
93%
[Winchester Supreme 780]*
<<locked>>
82%
28776
44%
**44
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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