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

Recommended Powder(s):

.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:
2026-03-14

Load data for 222 loads in caliber .338 Weatherby RPM with .338 | 300gr | Sierra HPBT LR MatchKing bullet and 111 powder(s). 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>>
86%
57406
88%
**51
100%
ADI AR 2208
<<locked>>
92%
58320
90%
**47
100%
ADI AR 2209
<<locked>>
97%
47239
73%
**95
97%
[ADI AR 2213]*
<<locked>>
97%
41901
64%
**33
94%
ADI Benchmark 8208
<<locked>>
85%
58175
89%
**21
100%
Accurate 2200
<<locked>>
85%
58378
90%
**34
100%
Accurate 2495
<<locked>>
84%
57841
89%
**95
100%
Accurate 2520
<<locked>>
84%
58378
90%
**34
100%
Accurate 2700
<<locked>>
92%
58262
90%
**18
99%
Accurate 3100
<<locked>>
97%
39581
61%
**73
98%
Accurate 4064
<<locked>>
90%
57754
89%
**21
100%
Accurate 4350
<<locked>>
97%
55201
85%
**87
100%
Alliant AR-Comp
<<locked>>
84%
57957
89%
**72
100%
Alliant Power Pro 2000-MR
<<locked>>
88%
58102
89%
**65
100%
Alliant Reloder- TS 15.5
<<locked>>
92%
58494
90%
**64
100%
Alliant Reloder-15
<<locked>>
89%
57972
89%
**77
100%
Alliant Reloder-16
<<locked>>
97%
53011
82%
**93
100%
Alliant Reloder-17
<<locked>>
95%
58189
90%
**65
100%
Alliant Reloder-19
<<locked>>
97%
46137
71%
**88
97%
Alliant Reloder-22
<<locked>>
97%
40205
62%
**36
96%
Alliant Reloder-23
<<locked>>
97%
37855
58%
**00
100%
Alliant Reloder-25
<<locked>>
97%
33866
52%
**34
97%
Alliant Reloder-26
<<locked>>
97%
41989
65%
**31
100%
Baschieri & Pellagri 107
<<locked>>
86%
57885
89%
**77
100%
[Bofors RP15]*
<<locked>>
97%
37318
57%
**83
94%
Bofors RP3
<<locked>>
91%
57711
89%
**67
100%
Bofors RP5
<<locked>>
97%
40205
62%
**36
96%
Bofors RP7
<<locked>>
95%
57609
89%
**54
99%
Hodgdon BL-C2
<<locked>>
85%
58450
90%
**74
100%
Hodgdon Benchmark
<<locked>>
84%
58131
89%
**88
100%
Hodgdon CFE223
<<locked>>
89%
58102
89%
**16
100%
Hodgdon H380
<<locked>>
91%
58305
90%
**77
100%
Hodgdon H414 👍
<<locked>>
94%
58189
90%
**36
100%
Hodgdon H4350
<<locked>>
97%
50908
78%
**98
99%
[Hodgdon H4831]*
<<locked>>
97%
38928
60%
**41
92%
[Hodgdon H4831 SC]*
<<locked>>
97%
43918
68%
**23
94%
Hodgdon H4895
<<locked>>
86%
58015
89%
**54
100%
Hodgdon Hybrid 100V
<<locked>>
97%
49661
76%
**92
100%
Hodgdon LVR 👍
<<locked>>
96%
57682
89%
**10
100%
Hodgdon Superperformance
<<locked>>
96%
57508
88%
**62
100%
Hodgdon VARGET
<<locked>>
92%
57972
89%
**47
100%
IMR 3031
<<locked>>
89%
58450
90%
**28
100%
IMR 4064
<<locked>>
92%
57667
89%
**31
100%
IMR 4166 Enduron
<<locked>>
93%
58407
90%
**38
100%
IMR 4350
<<locked>>
97%
54476
84%
**38
99%
IMR 4451 Enduron
<<locked>>
94%
58233
90%
**64
100%
IMR 4831
<<locked>>
97%
47137
73%
**75
100%
IMR 4895
<<locked>>
88%
57377
88%
**77
100%
[IMR 4955 Enduron]*
<<locked>>
97%
43830
67%
**96
94%
[IMR 7828 SSC]*
<<locked>>
97%
43207
66%
**65
94%
IMR 8208 XBR
<<locked>>
85%
58175
89%
**21
100%
Lovex D073.6
<<locked>>
86%
57783
89%
**31
100%
Lovex S060
<<locked>>
86%
58175
90%
**01
100%
Lovex S062
<<locked>>
90%
58001
89%
**31
100%
Lovex S065
<<locked>>
96%
57276
88%
**54
100%
Lovex S070
<<locked>>
97%
56420
87%
**64
100%
Lovex S071
<<locked>>
96%
32967
51%
**62
96%
Norma 201
<<locked>>
87%
57624
89%
**15
100%
Norma 202
<<locked>>
87%
58334
90%
**11
100%
Norma 203B
<<locked>>
90%
57986
89%
**74
100%
Norma 204
<<locked>>
97%
54752
84%
**80
98%
Norma MRP
<<locked>>
96%
41829
64%
**92
97%
Norma URP
<<locked>>
97%
54578
84%
**83
100%
Ramshot Big Game
<<locked>>
89%
58044
89%
**90
100%
Ramshot Grand
<<locked>>
97%
44614
69%
**95
95%
Ramshot Hunter
<<locked>>
97%
52982
82%
**83
100%
Ramshot Magnum
<<locked>>
97%
38783
60%
**93
95%
Ramshot TAC
<<locked>>
85%
57928
89%
**51
100%
Ramshot Wild Boar
<<locked>>
85%
57827
89%
**60
100%
ReloadSwiss RS 50
<<locked>>
90%
57725
89%
**57
100%
ReloadSwiss RS 52
<<locked>>
87%
58305
90%
**26
100%
ReloadSwiss RS 60
<<locked>>
93%
57972
89%
**56
100%
ReloadSwiss RS 62
<<locked>>
97%
54592
84%
**06
100%
ReloadSwiss RS 70 👍
<<locked>>
97%
54346
84%
**43
100%
[ReloadSwiss RS 76]*
<<locked>>
97%
31908
49%
**08
92%
Rottweil R 901
<<locked>>
84%
57653
89%
**82
100%
Rottweil R 902
<<locked>>
88%
57769
89%
**11
100%
Rottweil R 903
<<locked>>
93%
58015
89%
**64
100%
Rottweil R 904
<<locked>>
97%
48849
75%
**72
96%
Rottweil R 905
<<locked>>
97%
44991
69%
**75
97%
Rottweil R 907
<<locked>>
95%
57609
89%
**54
99%
SNPE Vectan SP 11
<<locked>>
92%
57972
89%
**00
100%
SNPE Vectan SP 7
<<locked>>
86%
58494
90%
**57
100%
SNPE Vectan SP 9
<<locked>>
87%
57435
88%
**47
100%
SNPE Vectan Tubal 3000
<<locked>>
86%
58349
90%
**49
100%
SNPE Vectan Tubal 5000
<<locked>>
92%
58088
89%
**46
100%
SNPE Vectan Tubal 7000
<<locked>>
96%
58146
89%
**24
100%
Shooters World Long Rifle
<<locked>>
96%
57276
88%
**54
100%
Shooters World Match Rifle
<<locked>>
86%
57783
89%
**31
100%
Shooters World Precision
<<locked>>
90%
58001
89%
**31
100%
Somchem S335
<<locked>>
87%
58407
90%
**59
100%
Somchem S341
<<locked>>
85%
58044
89%
**41
100%
Somchem S355
<<locked>>
93%
58378
90%
**64
100%
Somchem S361
<<locked>>
97%
50299
77%
**69
95%
Somchem S365
<<locked>>
97%
49255
76%
**44
100%
Somchem S385
<<locked>>
97%
45455
70%
**56
98%
Vihtavuori N133
<<locked>>
88%
57928
89%
**26
100%
Vihtavuori N135
<<locked>>
94%
58218
90%
**82
100%
Vihtavuori N140
<<locked>>
89%
58465
90%
**95
100%
Vihtavuori N150
<<locked>>
97%
55274
85%
**95
100%
Vihtavuori N160
<<locked>>
96%
58291
90%
**83
100%
Vihtavuori N165
<<locked>>
97%
38232
59%
**31
95%
Vihtavuori N530
<<locked>>
83%
58494
90%
**34
100%
Vihtavuori N540
<<locked>>
89%
57754
89%
**18
100%
Vihtavuori N550 👍
<<locked>>
96%
58189
90%
**23
100%
Vihtavuori N555
<<locked>>
97%
42003
65%
**59
100%
[Vihtavuori N560]*
<<locked>>
97%
40930
63%
**52
93%
Winchester 6.5 StaBALL
<<locked>>
97%
56362
87%
**51
100%
Winchester 760 👍
<<locked>>
94%
58189
90%
**36
100%
Winchester StaBALL HD
<<locked>>
97%
33910
52%
**23
100%
Winchester Supreme 780
<<locked>>
97%
46688
72%
**62
97%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
ADI AR 2206H
<<locked>>
81%
49458
76%
**56
100%
ADI AR 2208
<<locked>>
81%
42279
65%
**47
100%
[ADI AR 2209]*
<<locked>>
82%
29834
46%
**77
90%
[ADI AR 2213]*
<<locked>>
90%
34243
53%
**82
90%
ADI Benchmark 8208
<<locked>>
81%
51576
79%
**49
100%
Accurate 2200
<<locked>>
81%
51793
80%
**59
100%
Accurate 2495
<<locked>>
81%
52011
80%
**33
100%
Accurate 2520
<<locked>>
81%
52388
81%
**72
100%
Accurate 2700
<<locked>>
81%
40161
62%
**78
96%
[Accurate 3100]*
<<locked>>
81%
23351
36%
**45
91%
Accurate 4064
<<locked>>
81%
43918
68%
**60
100%
Accurate 4350
<<locked>>
81%
32314
50%
**52
98%
Alliant AR-Comp
<<locked>>
81%
53026
82%
**23
100%
Alliant Power Pro 2000-MR
<<locked>>
81%
45455
70%
**05
100%
Alliant Reloder- TS 15.5
<<locked>>
81%
42337
65%
**64
100%
Alliant Reloder-15
<<locked>>
81%
45034
69%
**13
100%
Alliant Reloder-16
<<locked>>
81%
32837
51%
**69
98%
Alliant Reloder-17
<<locked>>
81%
36463
56%
**60
100%
[Alliant Reloder-19]*
<<locked>>
81%
28848
44%
**60
90%
[Alliant Reloder-22]*
<<locked>>
86%
29225
45%
**09
90%
Alliant Reloder-23
<<locked>>
81%
23714
36%
**81
95%
[Alliant Reloder-25]*
<<locked>>
85%
24062
37%
**78
90%
[Alliant Reloder-26]*
<<locked>>
81%
24787
38%
**50
93%
Baschieri & Pellagri 107
<<locked>>
81%
48805
75%
**72
100%
[Bofors RP15]*
<<locked>>
89%
29153
45%
**03
90%
Bofors RP3
<<locked>>
81%
42018
65%
**70
100%
[Bofors RP5]*
<<locked>>
86%
29225
45%
**09
90%
Bofors RP7
<<locked>>
81%
37550
58%
**69
96%
Hodgdon BL-C2
<<locked>>
81%
51938
80%
**01
100%
Hodgdon Benchmark
<<locked>>
81%
53563
82%
**36
100%
Hodgdon CFE223
<<locked>>
81%
43497
67%
**29
100%
Hodgdon H380
<<locked>>
81%
42714
66%
**80
99%
Hodgdon H414
<<locked>>
81%
37840
58%
**51
97%
[Hodgdon H4350]*
<<locked>>
81%
31763
49%
**83
93%
[Hodgdon H4831]*
<<locked>>
93%
34592
53%
**62
90%
[Hodgdon H4831 SC]*
<<locked>>
89%
34592
53%
**62
90%
Hodgdon H4895
<<locked>>
81%
49937
77%
**59
100%
Hodgdon Hybrid 100V
<<locked>>
81%
30255
47%
**86
99%
Hodgdon LVR
<<locked>>
81%
35433
55%
**95
98%
[Hodgdon Superperformance]*
<<locked>>
81%
33924
52%
**95
94%
Hodgdon VARGET
<<locked>>
81%
41989
65%
**41
100%
IMR 3031
<<locked>>
81%
46224
71%
**93
100%
IMR 4064
<<locked>>
81%
41423
64%
**21
100%
IMR 4166 Enduron
<<locked>>
81%
41205
63%
**05
97%
[IMR 4350]*
<<locked>>
81%
33388
51%
**16
94%
IMR 4451 Enduron
<<locked>>
81%
39175
60%
**95
97%
IMR 4831
<<locked>>
81%
28790
44%
**67
96%
IMR 4895
<<locked>>
81%
46079
71%
**33
100%
[IMR 4955 Enduron]*
<<locked>>
88%
33547
52%
**13
90%
[IMR 7828 SSC]*
<<locked>>
90%
33881
52%
**88
90%
IMR 8208 XBR
<<locked>>
81%
51576
79%
**49
100%
Lovex D073.6
<<locked>>
81%
49356
76%
**36
100%
Lovex S060
<<locked>>
81%
49168
76%
**96
100%
Lovex S062
<<locked>>
81%
44150
68%
**67
100%
Lovex S065
<<locked>>
81%
36550
56%
**59
97%
Lovex S070
<<locked>>
81%
34679
53%
**39
96%
[Lovex S071]*
<<locked>>
84%
22104
34%
**09
90%
Norma 201
<<locked>>
81%
48588
75%
**10
100%
Norma 202
<<locked>>
81%
49211
76%
**13
100%
Norma 203B
<<locked>>
81%
44266
68%
**00
100%
[Norma 204]*
<<locked>>
81%
32503
50%
**26
92%
[Norma MRP]*
<<locked>>
82%
26150
40%
**50
90%
Norma URP
<<locked>>
81%
32721
50%
**52
98%
Ramshot Big Game
<<locked>>
81%
44106
68%
**23
100%
[Ramshot Grand]*
<<locked>>
89%
33663
52%
**95
90%
Ramshot Hunter
<<locked>>
81%
31937
49%
**46
95%
[Ramshot Magnum]*
<<locked>>
88%
28993
45%
**86
90%
Ramshot TAC
<<locked>>
81%
51648
79%
**75
100%
Ramshot Wild Boar
<<locked>>
81%
51503
79%
**85
100%
ReloadSwiss RS 50
<<locked>>
81%
42772
66%
**64
98%
ReloadSwiss RS 52
<<locked>>
81%
47863
74%
**01
100%
ReloadSwiss RS 60
<<locked>>
81%
38653
59%
**06
100%
ReloadSwiss RS 62
<<locked>>
81%
32184
50%
**72
97%
ReloadSwiss RS 70
<<locked>>
81%
32111
49%
**72
96%
[ReloadSwiss RS 76]*
<<locked>>
94%
29051
45%
**29
90%
Rottweil R 901
<<locked>>
81%
53113
82%
**33
100%
Rottweil R 902
<<locked>>
81%
46470
71%
**77
100%
Rottweil R 903
<<locked>>
81%
39537
61%
**28
100%
[Rottweil R 904]*
<<locked>>
83%
31850
49%
**86
90%
[Rottweil R 905]*
<<locked>>
82%
28195
43%
**54
90%
Rottweil R 907
<<locked>>
81%
37550
58%
**69
96%
SNPE Vectan SP 11
<<locked>>
81%
40509
62%
**70
100%
SNPE Vectan SP 7
<<locked>>
81%
50154
77%
**59
100%
SNPE Vectan SP 9
<<locked>>
81%
47848
74%
**36
100%
SNPE Vectan Tubal 3000
<<locked>>
81%
49893
77%
**60
100%
SNPE Vectan Tubal 5000
<<locked>>
81%
41640
64%
**62
100%
SNPE Vectan Tubal 7000
<<locked>>
81%
35534
55%
**09
96%
Shooters World Long Rifle
<<locked>>
81%
36550
56%
**59
97%
Shooters World Match Rifle
<<locked>>
81%
49356
76%
**36
100%
Shooters World Precision
<<locked>>
81%
44150
68%
**67
100%
Somchem S335
<<locked>>
81%
49443
76%
**60
100%
Somchem S341
<<locked>>
81%
49792
77%
**46
100%
Somchem S355
<<locked>>
81%
40248
62%
**28
100%
[Somchem S361]*
<<locked>>
85%
34127
53%
**16
90%
Somchem S365
<<locked>>
81%
29501
45%
**26
99%
[Somchem S385]*
<<locked>>
81%
27369
42%
**24
91%
Vihtavuori N133
<<locked>>
81%
46992
72%
**11
100%
Vihtavuori N135
<<locked>>
81%
39508
61%
**62
100%
Vihtavuori N140
<<locked>>
81%
46093
71%
**54
100%
Vihtavuori N150
<<locked>>
81%
34519
53%
**16
100%
Vihtavuori N160
<<locked>>
81%
35766
55%
**78
98%
[Vihtavuori N165]*
<<locked>>
86%
27282
42%
**11
90%
Vihtavuori N530
<<locked>>
81%
54723
84%
**92
100%
Vihtavuori N540
<<locked>>
81%
45542
70%
**77
100%
Vihtavuori N550
<<locked>>
81%
36071
55%
**11
98%
Vihtavuori N555
<<locked>>
81%
25338
39%
**34
95%
[Vihtavuori N560]*
<<locked>>
91%
34084
52%
**18
90%
Winchester 6.5 StaBALL
<<locked>>
81%
33620
52%
**36
99%
Winchester 760
<<locked>>
81%
37840
58%
**51
97%
[Winchester StaBALL HD]*
<<locked>>
81%
20784
32%
**36
92%
[Winchester Supreme 780]*
<<locked>>
83%
29008
45%
**47
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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