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

Recommended Powder(s):

.338 RCM + .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 RCM load data
Case Length (l3):
2.000" | 50.8mm
Cartridge Length (C.O.L.):
<<locked>>
Seated Depth:
<<locked>>
Shank Seated Depth:
<<locked>>
Case Capacity:
71.0 Grains of Water | 4.61 cm³
Primer Size:
Large Rifle (LR)
Max. allowed Pressure:
62366 psi | 4300 bar
LID:
LID_B5931_C458
Last updated:
2026-05-07

Load data for 220 loads in caliber .338 RCM with .338 | 300gr | Sierra HPBT LR MatchKing bullet and 110 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.

    .

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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>>
89%
55434
89%
**56
100%
ADI AR 2208 👍
<<locked>>
95%
55796
89%
**46
100%
[ADI AR 2209]*
<<locked>>
97%
39856
64%
**95
93%
ADI Benchmark 8208
<<locked>>
88%
55840
90%
**26
100%
Accurate 2015
<<locked>>
86%
55941
90%
**57
100%
Accurate 2200
<<locked>>
87%
55172
88%
**23
100%
Accurate 2230
<<locked>>
83%
55419
89%
**10
100%
Accurate 2460
<<locked>>
83%
55158
88%
**06
100%
Accurate 2495
<<locked>>
88%
55361
89%
**13
100%
Accurate 2520
<<locked>>
88%
55492
89%
**42
100%
Accurate 2700
<<locked>>
95%
55129
88%
**96
98%
[Accurate 3100]*
<<locked>>
96%
31488
50%
**77
94%
Accurate 4064
<<locked>>
94%
55564
89%
**39
100%
Accurate 4350
<<locked>>
96%
44715
72%
**93
99%
Alliant AR-Comp
<<locked>>
88%
55680
89%
**90
100%
Alliant Power Pro 2000-MR
<<locked>>
92%
55985
90%
**67
100%
Alliant Reloder- TS 15.5
<<locked>>
95%
55825
90%
**65
100%
Alliant Reloder-10x
<<locked>>
83%
55898
90%
**57
100%
Alliant Reloder-15
<<locked>>
93%
55361
89%
**72
100%
Alliant Reloder-16
<<locked>>
97%
45411
73%
**10
99%
Alliant Reloder-17 👍
<<locked>>
97%
51271
82%
**15
100%
[Alliant Reloder-19]*
<<locked>>
96%
38725
62%
**88
93%
Alliant Reloder-23
<<locked>>
97%
32126
52%
**19
98%
Alliant Reloder-26
<<locked>>
97%
34374
55%
**14
96%
Baschieri & Pellagri 107
<<locked>>
90%
56072
90%
**82
100%
Bofors RP3
<<locked>>
95%
55782
89%
**75
100%
Bofors RP7
<<locked>>
97%
52779
85%
**16
98%
Hodgdon BL-C2
<<locked>>
88%
55753
89%
**78
100%
Hodgdon Benchmark
<<locked>>
87%
55941
90%
**90
100%
Hodgdon CFE223
<<locked>>
85%
55216
89%
**18
100%
Hodgdon H322
<<locked>>
86%
55535
89%
**03
100%
Hodgdon H380 👍
<<locked>>
94%
55941
90%
**78
100%
Hodgdon H414
<<locked>>
97%
53925
86%
**08
99%
Hodgdon H4350
<<locked>>
97%
48457
78%
**93
96%
Hodgdon H4895
<<locked>>
89%
55912
90%
**59
100%
Hodgdon Hybrid 100V
<<locked>>
97%
41785
67%
**24
100%
Hodgdon LVR
<<locked>>
96%
48921
78%
**33
99%
Hodgdon Superperformance
<<locked>>
97%
49197
79%
**69
97%
Hodgdon VARGET
<<locked>>
93%
55521
89%
**39
100%
Hodgdon LEVERevolution
<<locked>>
94%
55347
89%
**95
100%
IMR 3031
<<locked>>
92%
55390
89%
**36
100%
IMR 4064
<<locked>>
96%
55796
89%
**36
100%
IMR 4166 Enduron
<<locked>>
96%
55811
89%
**23
99%
IMR 4350
<<locked>>
97%
45977
74%
**47
97%
IMR 4451 Enduron
<<locked>>
97%
54157
87%
**33
98%
IMR 4831
<<locked>>
97%
38711
62%
**91
98%
IMR 4895
<<locked>>
92%
55709
89%
**82
100%
IMR 8208 XBR
<<locked>>
88%
55840
90%
**26
100%
Lovex D073.5
<<locked>>
84%
55158
88%
**06
100%
Lovex D073.6
<<locked>>
90%
55492
89%
**42
100%
Lovex S060
<<locked>>
89%
55883
90%
**00
100%
Lovex S062
<<locked>>
93%
55854
90%
**36
100%
Lovex S065
<<locked>>
97%
50546
81%
**96
99%
Lovex S070
<<locked>>
97%
47747
77%
**80
98%
[Lovex S071]*
<<locked>>
97%
26847
43%
**81
92%
Norma 201
<<locked>>
90%
55956
90%
**26
100%
Norma 202
<<locked>>
90%
56072
90%
**23
100%
Norma 203B
<<locked>>
93%
55535
89%
**72
100%
Norma 204
<<locked>>
96%
45701
73%
**77
95%
[Norma MRP]*
<<locked>>
96%
34650
56%
**82
93%
Norma URP
<<locked>>
97%
45310
73%
**96
99%
Ramshot Big Game
<<locked>>
93%
54766
88%
**85
100%
Ramshot Hunter
<<locked>>
96%
44005
71%
**87
98%
Ramshot TAC
<<locked>>
88%
55637
89%
**42
100%
Ramshot Wild Boar
<<locked>>
88%
55550
89%
**65
100%
Ramshot X-Terminator
<<locked>>
85%
55492
89%
**16
100%
ReloadSwiss RS 40
<<locked>>
84%
55767
89%
**13
100%
ReloadSwiss RS 50 👍
<<locked>>
94%
55535
89%
**56
99%
ReloadSwiss RS 52
<<locked>>
90%
55085
88%
**18
100%
ReloadSwiss RS 60
<<locked>>
97%
54839
88%
**51
100%
ReloadSwiss RS 62
<<locked>>
97%
45107
72%
**23
99%
ReloadSwiss RS 70
<<locked>>
97%
45759
73%
**39
99%
Rottweil R 901
<<locked>>
87%
55303
89%
**87
100%
Rottweil R 902
<<locked>>
92%
55201
89%
**10
100%
Rottweil R 903
<<locked>>
97%
54998
88%
**62
100%
[Rottweil R 904]*
<<locked>>
97%
41611
67%
**85
92%
[Rottweil R 905]*
<<locked>>
96%
37101
59%
**69
93%
Rottweil R 907
<<locked>>
97%
52779
85%
**16
98%
SNPE Vectan SP 11 👍
<<locked>>
96%
55158
88%
**95
100%
SNPE Vectan SP 7
<<locked>>
88%
54911
88%
**39
100%
SNPE Vectan SP 9
<<locked>>
90%
55506
89%
**52
100%
SNPE Vectan Tubal 3000
<<locked>>
89%
55129
88%
**44
100%
SNPE Vectan Tubal 5000
<<locked>>
95%
55129
88%
**47
100%
SNPE Vectan Tubal 7000
<<locked>>
97%
50082
80%
**51
98%
Shooters World Long Rifle
<<locked>>
97%
50546
81%
**96
99%
Shooters World Match Rifle
<<locked>>
90%
55492
89%
**42
100%
Shooters World Precision
<<locked>>
93%
55854
90%
**36
100%
Somchem S321
<<locked>>
85%
55419
89%
**39
100%
Somchem S335
<<locked>>
90%
55869
90%
**64
100%
Somchem S341
<<locked>>
89%
54998
88%
**36
100%
Somchem S355
<<locked>>
97%
55695
89%
**62
100%
[Somchem S361]*
<<locked>>
97%
42467
68%
**82
91%
Somchem S365
<<locked>>
97%
40219
64%
**57
100%
[Somchem S385]*
<<locked>>
97%
37971
61%
**72
94%
Vihtavuori N130
<<locked>>
85%
55071
88%
**11
100%
Vihtavuori N133
<<locked>>
89%
55274
89%
**31
100%
Vihtavuori N135
<<locked>>
94%
56028
90%
**96
100%
Vihtavuori N140
<<locked>>
92%
55564
89%
**96
100%
Vihtavuori N150
<<locked>>
97%
53766
86%
**10
100%
Vihtavuori N160
<<locked>>
96%
47050
75%
**87
99%
Vihtavuori N530
<<locked>>
87%
55376
89%
**16
100%
Vihtavuori N540
<<locked>>
92%
55114
88%
**16
100%
Vihtavuori N550
<<locked>>
97%
46775
75%
**03
99%
Vihtavuori N555
<<locked>>
97%
33750
54%
**69
98%
Winchester 6.5 StaBALL
<<locked>>
96%
47630
76%
**77
100%
Winchester 748
<<locked>>
86%
55985
90%
**65
100%
Winchester 760
<<locked>>
97%
53925
86%
**08
99%
Winchester StaBALL HD
<<locked>>
96%
28108
45%
**93
97%
Winchester StaBALL Match
<<locked>>
84%
55985
90%
**69
100%
[Winchester Supreme 780]*
<<locked>>
97%
39711
64%
**75
93%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
ADI AR 2206H
<<locked>>
81%
42830
69%
**91
100%
ADI AR 2208
<<locked>>
81%
36637
59%
**90
98%
[ADI AR 2209]*
<<locked>>
91%
33417
54%
**77
90%
ADI Benchmark 8208
<<locked>>
81%
44918
72%
**98
100%
Accurate 2015
<<locked>>
81%
48501
78%
**78
100%
Accurate 2200
<<locked>>
81%
45034
72%
**95
99%
Accurate 2230
<<locked>>
81%
51010
82%
**64
100%
Accurate 2460
<<locked>>
81%
51024
82%
**64
100%
Accurate 2495
<<locked>>
81%
43830
70%
**85
100%
Accurate 2520
<<locked>>
81%
44324
71%
**14
100%
[Accurate 2700]*
<<locked>>
81%
34780
56%
**18
93%
[Accurate 3100]*
<<locked>>
89%
24642
40%
**26
90%
Accurate 4064
<<locked>>
81%
37072
59%
**13
100%
[Accurate 4350]*
<<locked>>
81%
26411
42%
**75
94%
Alliant AR-Comp
<<locked>>
81%
44831
72%
**82
100%
Alliant Power Pro 2000-MR
<<locked>>
81%
38856
62%
**28
99%
Alliant Reloder- TS 15.5
<<locked>>
81%
35752
57%
**03
99%
Alliant Reloder-10x
<<locked>>
81%
52663
84%
**28
100%
Alliant Reloder-15
<<locked>>
81%
38609
62%
**49
99%
[Alliant Reloder-16]*
<<locked>>
81%
28210
45%
**95
94%
Alliant Reloder-17
<<locked>>
81%
31038
50%
**90
98%
[Alliant Reloder-19]*
<<locked>>
91%
32474
52%
**70
90%
[Alliant Reloder-23]*
<<locked>>
81%
20247
32%
**08
90%
[Alliant Reloder-26]*
<<locked>>
86%
24758
40%
**78
90%
Baschieri & Pellagri 107
<<locked>>
81%
41669
67%
**98
99%
Bofors RP3
<<locked>>
81%
35244
57%
**09
99%
[Bofors RP7]*
<<locked>>
81%
32532
52%
**08
92%
Hodgdon BL-C2
<<locked>>
81%
43888
70%
**37
100%
Hodgdon Benchmark
<<locked>>
81%
46818
75%
**85
100%
Hodgdon CFE223
<<locked>>
81%
47718
77%
**26
100%
Hodgdon H322
<<locked>>
81%
47892
77%
**21
100%
Hodgdon H380
<<locked>>
81%
36477
58%
**09
97%
[Hodgdon H414]*
<<locked>>
81%
31894
51%
**70
93%
[Hodgdon H4350]*
<<locked>>
82%
30719
49%
**98
90%
Hodgdon H4895
<<locked>>
81%
43163
69%
**01
100%
Hodgdon Hybrid 100V
<<locked>>
81%
25541
41%
**19
95%
Hodgdon LVR
<<locked>>
81%
30095
48%
**24
95%
[Hodgdon Superperformance]*
<<locked>>
82%
29965
48%
**34
90%
Hodgdon VARGET
<<locked>>
81%
38595
62%
**19
99%
Hodgdon LEVERevolution
<<locked>>
81%
36941
59%
**55
99%
IMR 3031
<<locked>>
81%
39218
63%
**46
100%
IMR 4064
<<locked>>
81%
35795
57%
**67
98%
[IMR 4166 Enduron]*
<<locked>>
81%
36230
58%
**44
94%
[IMR 4350]*
<<locked>>
82%
29196
47%
**62
90%
[IMR 4451 Enduron]*
<<locked>>
81%
33808
54%
**31
93%
[IMR 4831]*
<<locked>>
81%
23989
38%
**96
92%
IMR 4895
<<locked>>
81%
39436
63%
**69
99%
IMR 8208 XBR
<<locked>>
81%
44918
72%
**98
100%
Lovex D073.5
<<locked>>
81%
51024
82%
**64
100%
Lovex D073.6
<<locked>>
81%
41655
67%
**78
100%
Lovex S060
<<locked>>
81%
43294
69%
**46
100%
Lovex S062
<<locked>>
81%
38087
61%
**09
100%
[Lovex S065]*
<<locked>>
81%
31299
50%
**98
94%
[Lovex S070]*
<<locked>>
81%
29588
47%
**78
92%
[Lovex S071]*
<<locked>>
94%
24831
40%
**32
90%
Norma 201
<<locked>>
81%
42177
68%
**59
100%
Norma 202
<<locked>>
81%
42322
68%
**62
100%
Norma 203B
<<locked>>
81%
37840
61%
**39
99%
[Norma 204]*
<<locked>>
86%
33301
53%
**67
90%
[Norma MRP]*
<<locked>>
91%
29776
48%
**73
90%
[Norma URP]*
<<locked>>
81%
27804
45%
**88
94%
Ramshot Big Game
<<locked>>
81%
37362
60%
**55
99%
[Ramshot Hunter]*
<<locked>>
81%
27050
43%
**65
91%
Ramshot TAC
<<locked>>
81%
44788
72%
**08
98%
Ramshot Wild Boar
<<locked>>
81%
43830
70%
**21
100%
Ramshot X-Terminator
<<locked>>
81%
48385
78%
**34
100%
ReloadSwiss RS 40
<<locked>>
81%
50488
81%
**54
100%
ReloadSwiss RS 50
<<locked>>
81%
36709
59%
**93
95%
ReloadSwiss RS 52
<<locked>>
81%
40045
64%
**24
99%
ReloadSwiss RS 60
<<locked>>
81%
33025
53%
**36
100%
[ReloadSwiss RS 62]*
<<locked>>
81%
26760
43%
**88
93%
[ReloadSwiss RS 70]*
<<locked>>
81%
27441
44%
**91
92%
Rottweil R 901
<<locked>>
81%
46296
74%
**85
100%
Rottweil R 902
<<locked>>
81%
40030
64%
**23
100%
Rottweil R 903
<<locked>>
81%
33359
53%
**67
99%
[Rottweil R 904]*
<<locked>>
92%
36143
58%
**96
90%
[Rottweil R 905]*
<<locked>>
91%
31662
51%
**64
90%
[Rottweil R 907]*
<<locked>>
81%
32532
52%
**08
92%
SNPE Vectan SP 11
<<locked>>
81%
34084
55%
**03
98%
SNPE Vectan SP 7
<<locked>>
81%
43033
69%
**91
98%
SNPE Vectan SP 9
<<locked>>
81%
41278
66%
**72
99%
SNPE Vectan Tubal 3000
<<locked>>
81%
43801
70%
**19
100%
SNPE Vectan Tubal 5000
<<locked>>
81%
36245
58%
**24
100%
[SNPE Vectan Tubal 7000]*
<<locked>>
81%
30023
48%
**52
92%
[Shooters World Long Rifle]*
<<locked>>
81%
31299
50%
**98
94%
Shooters World Match Rifle
<<locked>>
81%
41655
67%
**78
100%
Shooters World Precision
<<locked>>
81%
38087
61%
**09
100%
Somchem S321
<<locked>>
81%
48240
77%
**60
100%
Somchem S335
<<locked>>
81%
43279
69%
**23
100%
Somchem S341
<<locked>>
81%
42395
68%
**85
99%
Somchem S355
<<locked>>
81%
34243
55%
**70
99%
[Somchem S361]*
<<locked>>
94%
39001
63%
**29
90%
Somchem S365
<<locked>>
81%
24787
40%
**52
97%
[Somchem S385]*
<<locked>>
88%
28616
46%
**95
90%
Vihtavuori N130
<<locked>>
81%
49501
79%
**59
100%
Vihtavuori N133
<<locked>>
81%
44251
71%
**13
100%
Vihtavuori N135
<<locked>>
81%
37463
60%
**83
100%
Vihtavuori N140
<<locked>>
81%
40190
64%
**19
100%
Vihtavuori N150
<<locked>>
81%
32706
52%
**24
99%
Vihtavuori N160
<<locked>>
81%
28863
46%
**85
95%
Vihtavuori N530
<<locked>>
81%
45208
72%
**98
100%
Vihtavuori N540
<<locked>>
81%
38479
62%
**13
100%
[Vihtavuori N550]*
<<locked>>
81%
28282
45%
**91
94%
[Vihtavuori N555]*
<<locked>>
81%
20929
34%
**60
91%
Winchester 6.5 StaBALL
<<locked>>
81%
28848
46%
**72
97%
Winchester 748
<<locked>>
81%
47747
77%
**73
100%
[Winchester 760]*
<<locked>>
81%
31894
51%
**70
93%
[Winchester StaBALL HD]*
<<locked>>
88%
21582
35%
**86
90%
Winchester StaBALL Match
<<locked>>
81%
50807
81%
**13
100%
[Winchester Supreme 780]*
<<locked>>
91%
32938
53%
**57
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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