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Load data for 7 mm Backcountry + .284 | 151gr | Warner Tool Co. Flat Line

Recommended Powder(s): Hodgdon H414, Hodgdon H4350, ReloadSwiss RS 50, ReloadSwiss RS 70, Winchester 760

7 mm Backcountry + .284 | 151gr | Warner Tool Co. Flat Line

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:
.284 | 151gr | Warner Tool Co. Flat Line
Manufacturer SKU:
5004
Bullet Weight:
151gr | 9.8g
Bullet Diameter:
0.284" | 7.21mm
Bullet Length:
<<locked>>
Caliber:
7 mm Backcountry load data
Case Length (l3):
2.417" | 61.4mm
Cartridge Length (C.O.L.):
<<locked>>
Seated Depth:
<<locked>>
Shank Seated Depth:
<<locked>>
Case Capacity:
73.0 Grains of Water | 4.74 cm³
Primer Size:
Large Rifle (LR)
Max. allowed Pressure:
79916 psi | 5510 bar
LID:
LID_B12221_C991
Last updated:
2026-07-13
Recommended Twist Rate:
1:8 - 1:7

Load data for 268 loads in caliber 7 mm Backcountry with .284 | 151gr | Warner Tool Co. Flat Line bullet and 134 powders such as Hodgdon H414, Hodgdon H4350, ReloadSwiss RS 50, 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 APS 450
<<locked>>
92%
71431
89%
**23
101%
ADI AR 2206H
<<locked>>
90%
70938
89%
**15
100%
ADI AR 2208
<<locked>>
96%
71388
89%
**12
100%
ADI AR 2209
<<locked>>
97%
52228
65%
**41
97%
[ADI AR 2213]*
<<locked>>
97%
46340
58%
**59
94%
ADI Benchmark 8208
<<locked>>
89%
71431
89%
**79
100%
Accurate 2015
<<locked>>
88%
71504
89%
**81
100%
Accurate 2460
<<locked>>
85%
71721
90%
**40
100%
Accurate 2495
<<locked>>
92%
71721
90%
**13
100%
Accurate 2520
<<locked>>
87%
71750
90%
**76
100%
Accurate 2700
<<locked>>
93%
71272
89%
**79
100%
Accurate 3100
<<locked>>
97%
45324
57%
**97
98%
Accurate 4064
<<locked>>
94%
71649
90%
**69
100%
Accurate 4350
<<locked>>
97%
62468
78%
**66
100%
[Accurate MAGPRO]*
<<locked>>
97%
46891
59%
**05
93%
Alliant AR-Comp
<<locked>>
88%
71040
89%
**07
100%
Alliant Power Pro 1200-R
<<locked>>
83%
70793
89%
**54
100%
Alliant Power Pro 2000-MR
<<locked>>
91%
70967
89%
**46
100%
Alliant Reloder- TS 15.5
<<locked>>
95%
70866
89%
**15
100%
Alliant Reloder-10x
<<locked>>
85%
71837
90%
**97
100%
Alliant Reloder-15
<<locked>>
93%
70750
89%
**31
100%
Alliant Reloder-16
<<locked>>
97%
58639
73%
**63
100%
Alliant Reloder-17
<<locked>>
97%
69430
87%
**00
100%
Alliant Reloder-19
<<locked>>
97%
51314
64%
**28
97%
Alliant Reloder-22
<<locked>>
97%
44962
56%
**56
96%
Alliant Reloder-23
<<locked>>
97%
42496
53%
**17
100%
Alliant Reloder-25
<<locked>>
97%
37579
47%
**18
97%
Alliant Reloder-26
<<locked>>
97%
48037
60%
**84
100%
Baschieri & Pellagri 106
<<locked>>
83%
70808
89%
**51
100%
Baschieri & Pellagri 107
<<locked>>
90%
71533
90%
**41
100%
[Bofors RP15]*
<<locked>>
97%
41713
52%
**90
94%
Bofors RP3
<<locked>>
94%
70503
88%
**12
100%
Bofors RP5
<<locked>>
97%
44962
56%
**56
96%
Bofors RP7
<<locked>>
97%
66210
83%
**66
100%
Hodgdon BL-C2
<<locked>>
89%
71330
89%
**09
100%
Hodgdon Benchmark
<<locked>>
88%
71257
89%
**40
100%
Hodgdon CFE223
<<locked>>
85%
70692
88%
**87
100%
Hodgdon H322
<<locked>>
85%
71678
90%
**53
100%
Hodgdon H335
<<locked>>
84%
70880
89%
**59
100%
Hodgdon H380
<<locked>>
94%
71011
89%
**31
100%
Hodgdon H414 👍
<<locked>>
97%
63962
80%
**15
100%
Hodgdon H4350 👍
<<locked>>
97%
68182
85%
**25
99%
[Hodgdon H4831]*
<<locked>>
97%
49545
62%
**66
94%
[Hodgdon H4831 SC]*
<<locked>>
97%
48443
61%
**49
94%
Hodgdon H4895
<<locked>>
90%
71765
90%
**25
100%
Hodgdon Hybrid 100V
<<locked>>
97%
55593
70%
**44
100%
Hodgdon LEVERevolution
<<locked>>
92%
71634
90%
**54
100%
Hodgdon Superformance
<<locked>>
97%
66108
83%
**77
100%
Hodgdon TrailBoss
<<locked>>
97%
34708
43%
**13
100%
Hodgdon VARGET
<<locked>>
91%
71098
89%
**05
100%
IMR 3031
<<locked>>
90%
71852
90%
**82
100%
IMR 4064
<<locked>>
94%
71649
90%
**99
100%
IMR 4166 Enduron
<<locked>>
92%
71141
89%
**99
100%
IMR 4198
<<locked>>
85%
71214
89%
**51
100%
IMR 4350
<<locked>>
97%
59756
75%
**94
99%
IMR 4451 Enduron
<<locked>>
97%
67834
85%
**89
100%
IMR 4831
<<locked>>
97%
57711
72%
**97
100%
IMR 4895
<<locked>>
92%
71417
89%
**45
100%
IMR 4955 Enduron
<<locked>>
97%
52025
65%
**72
95%
[IMR 7828 SSC]*
<<locked>>
97%
44164
55%
**30
93%
IMR 8208 XBR
<<locked>>
89%
71431
89%
**79
100%
Lovex D073.5
<<locked>>
84%
71910
90%
**56
100%
Lovex D073.6
<<locked>>
90%
71620
90%
**79
100%
Lovex S060
<<locked>>
91%
71707
90%
**63
100%
Lovex S062
<<locked>>
94%
71301
89%
**82
100%
Lovex S065
<<locked>>
97%
63817
80%
**33
100%
Lovex S070
<<locked>>
97%
62149
78%
**36
100%
Lovex S071
<<locked>>
97%
37478
47%
**43
96%
Norma 201
<<locked>>
91%
71765
90%
**86
100%
Norma 202
<<locked>>
91%
71562
90%
**59
100%
Norma 203B
<<locked>>
93%
71054
89%
**35
100%
Norma 204
<<locked>>
97%
61235
77%
**59
98%
Norma MRP
<<locked>>
97%
47413
59%
**44
98%
Norma URP
<<locked>>
97%
60756
76%
**53
100%
Ramshot Big Game
<<locked>>
93%
71446
89%
**51
100%
[Ramshot Grand]*
<<locked>>
97%
43932
55%
**30
93%
Ramshot Hunter
<<locked>>
97%
59350
74%
**56
100%
[Ramshot Magnum]*
<<locked>>
97%
38725
48%
**02
94%
Ramshot TAC
<<locked>>
88%
70967
89%
**15
100%
Ramshot Wild Boar
<<locked>>
89%
71475
89%
**22
100%
Ramshot X-Terminator
<<locked>>
86%
71344
89%
**76
100%
ReloadSwiss RS 14
<<locked>>
96%
35172
44%
**52
100%
ReloadSwiss RS 40
<<locked>>
85%
71301
89%
**66
100%
ReloadSwiss RS 50 👍
<<locked>>
94%
71634
90%
**28
100%
ReloadSwiss RS 52
<<locked>>
90%
71025
89%
**91
100%
ReloadSwiss RS 60
<<locked>>
96%
71373
89%
**20
100%
ReloadSwiss RS 62
<<locked>>
97%
61293
77%
**82
100%
ReloadSwiss RS 70 👍
<<locked>>
97%
61192
77%
**31
100%
[ReloadSwiss RS 76]*
<<locked>>
97%
36042
45%
**08
93%
Rottweil R 901
<<locked>>
89%
71040
89%
**36
100%
Rottweil R 902
<<locked>>
93%
71011
89%
**66
100%
Rottweil R 903
<<locked>>
96%
71257
89%
**12
100%
Rottweil R 904
<<locked>>
97%
53983
68%
**12
96%
Rottweil R 905
<<locked>>
97%
50415
63%
**12
97%
Rottweil R 907
<<locked>>
97%
66210
83%
**66
100%
SNPE Vectan BA6 1/2
<<locked>>
84%
71895
90%
**92
100%
SNPE Vectan SP 11
<<locked>>
95%
71170
89%
**51
100%
SNPE Vectan SP 3
<<locked>>
84%
71141
89%
**07
100%
SNPE Vectan SP 7
<<locked>>
89%
71359
89%
**12
100%
SNPE Vectan SP 9
<<locked>>
91%
71040
89%
**05
100%
SNPE Vectan Tubal 3000
<<locked>>
90%
71257
89%
**84
100%
SNPE Vectan Tubal 5000
<<locked>>
96%
71199
89%
**74
100%
SNPE Vectan Tubal 7000
<<locked>>
97%
64571
81%
**90
100%
SNPE Vectan Tubal 8000
<<locked>>
97%
49966
63%
**12
97%
Shooters World Long Rifle
<<locked>>
97%
63817
80%
**33
100%
Shooters World Match Rifle
<<locked>>
90%
71620
90%
**79
100%
Shooters World Precision
<<locked>>
94%
71301
89%
**82
100%
Shooters World SW4350
<<locked>>
97%
62149
78%
**36
100%
Shooters World Tactical Rifle
<<locked>>
84%
71823
90%
**46
100%
Somchem S321
<<locked>>
86%
71576
90%
**99
100%
Somchem S335
<<locked>>
91%
70808
89%
**81
100%
Somchem S341
<<locked>>
89%
71881
90%
**02
100%
Somchem S355
<<locked>>
97%
70924
89%
**12
100%
Somchem S361
<<locked>>
97%
55767
70%
**08
96%
Somchem S365
<<locked>>
97%
55767
70%
**97
100%
Somchem S385
<<locked>>
97%
50647
63%
**85
98%
Vihtavuori N130
<<locked>>
87%
71547
90%
**48
100%
Vihtavuori N133
<<locked>>
90%
71402
89%
**61
100%
Vihtavuori N135
<<locked>>
94%
71794
90%
**20
100%
Vihtavuori N140
<<locked>>
92%
71025
89%
**23
100%
Vihtavuori N150
<<locked>>
97%
69502
87%
**40
100%
Vihtavuori N160
<<locked>>
97%
63353
79%
**49
100%
Vihtavuori N165
<<locked>>
97%
44135
55%
**57
96%
Vihtavuori N530
<<locked>>
88%
71127
89%
**72
100%
Vihtavuori N540
<<locked>>
93%
71649
90%
**56
100%
Vihtavuori N550
<<locked>>
97%
62265
78%
**56
100%
Vihtavuori N555
<<locked>>
97%
47413
59%
**95
100%
[Vihtavuori N560]*
<<locked>>
97%
48138
60%
**25
94%
Winchester 6.5 StaBALL
<<locked>>
97%
63063
79%
**13
100%
Winchester 748
<<locked>>
88%
71634
90%
**12
100%
Winchester 760 👍
<<locked>>
97%
65325
82%
**28
100%
Winchester StaBALL HD
<<locked>>
97%
35940
45%
**46
100%
Winchester StaBALL Match
<<locked>>
90%
70996
89%
**12
100%
Winchester Supreme 780
<<locked>>
97%
47181
59%
**17
96%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
ADI APS 450
<<locked>>
81%
59683
75%
**72
101%
ADI AR 2206H
<<locked>>
81%
53621
67%
**89
100%
ADI AR 2208
<<locked>>
81%
45585
57%
**48
100%
[ADI AR 2209]*
<<locked>>
83%
33402
42%
**41
90%
[ADI AR 2213]*
<<locked>>
90%
37652
47%
**66
90%
ADI Benchmark 8208
<<locked>>
81%
55738
70%
**85
100%
Accurate 2015
<<locked>>
81%
57493
72%
**20
100%
Accurate 2460
<<locked>>
81%
63802
80%
**51
100%
Accurate 2495
<<locked>>
81%
50444
63%
**64
100%
Accurate 2520
<<locked>>
81%
58566
73%
**22
100%
Accurate 2700
<<locked>>
81%
48762
61%
**61
97%
[Accurate 3100]*
<<locked>>
81%
26339
33%
**54
91%
Accurate 4064
<<locked>>
81%
47776
60%
**67
100%
Accurate 4350
<<locked>>
81%
36158
45%
**30
97%
[Accurate MAGPRO]*
<<locked>>
92%
39378
49%
**54
90%
Alliant AR-Comp
<<locked>>
81%
57450
72%
**59
100%
Alliant Power Pro 1200-R
<<locked>>
81%
66210
83%
**99
100%
Alliant Power Pro 2000-MR
<<locked>>
81%
49937
62%
**54
100%
Alliant Reloder- TS 15.5
<<locked>>
81%
45818
57%
**71
100%
Alliant Reloder-10x
<<locked>>
81%
63918
80%
**12
100%
Alliant Reloder-15
<<locked>>
81%
48950
61%
**33
100%
Alliant Reloder-16
<<locked>>
81%
35592
45%
**33
97%
Alliant Reloder-17
<<locked>>
81%
40147
50%
**67
100%
[Alliant Reloder-19]*
<<locked>>
83%
32605
41%
**31
90%
[Alliant Reloder-22]*
<<locked>>
87%
32460
41%
**70
90%
Alliant Reloder-23
<<locked>>
81%
25933
32%
**87
95%
[Alliant Reloder-25]*
<<locked>>
86%
26963
34%
**13
90%
[Alliant Reloder-26]*
<<locked>>
81%
27499
34%
**82
92%
Baschieri & Pellagri 106
<<locked>>
81%
65630
82%
**92
100%
Baschieri & Pellagri 107
<<locked>>
81%
53200
67%
**02
100%
[Bofors RP15]*
<<locked>>
89%
32837
41%
**74
90%
Bofors RP3
<<locked>>
81%
45861
57%
**74
100%
[Bofors RP5]*
<<locked>>
87%
32460
41%
**70
90%
Bofors RP7
<<locked>>
81%
40712
51%
**49
95%
Hodgdon BL-C2
<<locked>>
81%
55637
70%
**18
100%
Hodgdon Benchmark
<<locked>>
81%
57029
71%
**69
100%
Hodgdon CFE223
<<locked>>
81%
61830
77%
**76
100%
Hodgdon H322
<<locked>>
81%
63570
80%
**64
100%
Hodgdon H335
<<locked>>
81%
65514
82%
**97
100%
Hodgdon H380
<<locked>>
81%
46209
58%
**80
99%
Hodgdon H414
<<locked>>
81%
38305
48%
**69
95%
Hodgdon H4350
<<locked>>
81%
41263
52%
**98
95%
[Hodgdon H4831]*
<<locked>>
89%
38740
48%
**52
90%
[Hodgdon H4831 SC]*
<<locked>>
90%
38740
48%
**52
90%
Hodgdon H4895
<<locked>>
81%
54186
68%
**99
100%
Hodgdon Hybrid 100V
<<locked>>
81%
33040
41%
**38
98%
Hodgdon LEVERevolution
<<locked>>
81%
50401
63%
**76
100%
[Hodgdon Superformance]*
<<locked>>
81%
37246
47%
**79
94%
Hodgdon TrailBoss
<<locked>>
81%
27499
34%
**68
100%
Hodgdon VARGET
<<locked>>
81%
51909
65%
**53
100%
IMR 3031
<<locked>>
81%
54288
68%
**69
100%
IMR 4064
<<locked>>
81%
47993
60%
**84
100%
IMR 4166 Enduron
<<locked>>
81%
50459
63%
**03
98%
IMR 4198
<<locked>>
81%
63251
79%
**59
100%
[IMR 4350]*
<<locked>>
81%
36129
45%
**70
94%
IMR 4451 Enduron
<<locked>>
81%
42076
53%
**82
96%
IMR 4831
<<locked>>
81%
34911
44%
**84
97%
IMR 4895
<<locked>>
81%
50285
63%
**69
100%
[IMR 4955 Enduron]*
<<locked>>
86%
37217
47%
**87
90%
[IMR 7828 SSC]*
<<locked>>
92%
37869
47%
**79
90%
IMR 8208 XBR
<<locked>>
81%
55738
70%
**85
100%
Lovex D073.5
<<locked>>
81%
63860
80%
**64
100%
Lovex D073.6
<<locked>>
81%
53606
67%
**59
100%
Lovex S060
<<locked>>
81%
52576
66%
**17
100%
Lovex S062
<<locked>>
81%
47892
60%
**74
100%
Lovex S065
<<locked>>
81%
39479
49%
**23
97%
Lovex S070
<<locked>>
81%
37579
47%
**07
95%
[Lovex S071]*
<<locked>>
85%
25599
32%
**31
90%
Norma 201
<<locked>>
81%
52344
65%
**30
100%
Norma 202
<<locked>>
81%
52953
66%
**40
100%
Norma 203B
<<locked>>
81%
48457
61%
**23
100%
[Norma 204]*
<<locked>>
81%
35679
45%
**93
92%
[Norma MRP]*
<<locked>>
83%
29805
37%
**21
90%
Norma URP
<<locked>>
81%
35853
45%
**20
97%
Ramshot Big Game
<<locked>>
81%
48472
61%
**46
100%
[Ramshot Grand]*
<<locked>>
92%
37347
47%
**85
90%
Ramshot Hunter
<<locked>>
81%
34983
44%
**03
95%
[Ramshot Magnum]*
<<locked>>
92%
32474
41%
**48
90%
Ramshot TAC
<<locked>>
81%
55854
70%
**15
100%
Ramshot Wild Boar
<<locked>>
81%
55869
70%
**28
100%
Ramshot X-Terminator
<<locked>>
81%
59872
75%
**41
100%
ReloadSwiss RS 14
<<locked>>
81%
28021
35%
**04
100%
ReloadSwiss RS 40
<<locked>>
81%
62526
78%
**61
100%
ReloadSwiss RS 50
<<locked>>
81%
46615
58%
**74
98%
ReloadSwiss RS 52
<<locked>>
81%
52837
66%
**54
100%
ReloadSwiss RS 60
<<locked>>
81%
42670
53%
**23
100%
ReloadSwiss RS 62
<<locked>>
81%
35694
45%
**39
97%
ReloadSwiss RS 70
<<locked>>
81%
35157
44%
**43
96%
[ReloadSwiss RS 76]*
<<locked>>
94%
32430
41%
**97
90%
Rottweil R 901
<<locked>>
81%
56449
71%
**59
100%
Rottweil R 902
<<locked>>
81%
49966
63%
**87
100%
Rottweil R 903
<<locked>>
81%
43062
54%
**21
100%
[Rottweil R 904]*
<<locked>>
84%
35795
45%
**64
90%
[Rottweil R 905]*
<<locked>>
83%
31720
40%
**18
90%
Rottweil R 907
<<locked>>
81%
40712
51%
**49
95%
SNPE Vectan BA6 1/2
<<locked>>
81%
66384
83%
**36
100%
SNPE Vectan SP 11
<<locked>>
81%
44338
55%
**77
100%
SNPE Vectan SP 3
<<locked>>
81%
65325
82%
**41
100%
SNPE Vectan SP 7
<<locked>>
81%
54607
68%
**92
100%
SNPE Vectan SP 9
<<locked>>
81%
52054
65%
**66
100%
SNPE Vectan Tubal 3000
<<locked>>
81%
53359
67%
**71
100%
SNPE Vectan Tubal 5000
<<locked>>
81%
44788
56%
**43
100%
SNPE Vectan Tubal 7000
<<locked>>
81%
38595
48%
**67
95%
[SNPE Vectan Tubal 8000]*
<<locked>>
84%
32053
40%
**28
90%
Shooters World Long Rifle
<<locked>>
81%
39479
49%
**23
97%
Shooters World Match Rifle
<<locked>>
81%
53606
67%
**59
100%
Shooters World Precision
<<locked>>
81%
47892
60%
**74
100%
Shooters World SW4350
<<locked>>
81%
37579
47%
**07
95%
Shooters World Tactical Rifle
<<locked>>
81%
66239
83%
**94
100%
Somchem S321
<<locked>>
81%
60916
76%
**67
100%
Somchem S335
<<locked>>
81%
52881
66%
**67
100%
Somchem S341
<<locked>>
81%
54230
68%
**85
100%
Somchem S355
<<locked>>
81%
43598
55%
**25
100%
[Somchem S361]*
<<locked>>
86%
38261
48%
**90
90%
Somchem S365
<<locked>>
81%
32387
41%
**74
99%
[Somchem S385]*
<<locked>>
81%
30255
38%
**56
91%
Vihtavuori N130
<<locked>>
81%
59669
75%
**13
100%
Vihtavuori N133
<<locked>>
81%
53722
67%
**54
100%
Vihtavuori N135
<<locked>>
81%
47471
59%
**25
100%
Vihtavuori N140
<<locked>>
81%
50140
63%
**64
100%
Vihtavuori N150
<<locked>>
81%
41495
52%
**52
100%
Vihtavuori N160
<<locked>>
81%
37492
47%
**26
98%
[Vihtavuori N165]*
<<locked>>
86%
30748
38%
**52
90%
Vihtavuori N530
<<locked>>
81%
56202
70%
**85
100%
Vihtavuori N540
<<locked>>
81%
48414
61%
**61
100%
Vihtavuori N550
<<locked>>
81%
36796
46%
**20
97%
Vihtavuori N555
<<locked>>
81%
28079
35%
**59
95%
[Vihtavuori N560]*
<<locked>>
90%
37971
48%
**05
90%
Winchester 6.5 StaBALL
<<locked>>
81%
36782
46%
**97
99%
Winchester 748
<<locked>>
81%
56739
71%
**35
100%
Winchester 760
<<locked>>
81%
38305
48%
**69
95%
[Winchester StaBALL HD]*
<<locked>>
81%
22843
29%
**28
91%
Winchester StaBALL Match
<<locked>>
81%
51764
65%
**69
100%
[Winchester Supreme 780]*
<<locked>>
86%
32518
41%
**02
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.

<<locked>>... you need to buy an access license to unlock the data

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