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Load data for 7 mm Backcountry + .284 | 139gr | Hornady GMX

Recommended Powder(s): Accurate 2700, Hodgdon H380, IMR 4166 Enduron, IMR 4451 Enduron, ReloadSwiss RS 50

7 mm Backcountry + .284 | 139gr | Hornady GMX

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:
.284 | 139gr | Hornady GMX
Manufacturer SKU:
o_28270
Bullet Weight:
139gr | 9.0g
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_B2626_C991
Last updated:
2026-07-13
Recommended Twist Rate:
1:10 - 1:8

Load data for 260 loads in caliber 7 mm Backcountry with .284 | 139gr | Hornady GMX bullet and 130 powders such as Accurate 2700, Hodgdon H380, IMR 4166 Enduron, IMR 4451 Enduron, ReloadSwiss RS 50. 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>>
93%
71779
90%
**41
100%
ADI AR 2206H
<<locked>>
91%
71141
89%
**66
100%
ADI AR 2208
<<locked>>
97%
71344
89%
**43
100%
ADI AR 2209
<<locked>>
97%
50067
63%
**30
96%
[ADI AR 2213]*
<<locked>>
97%
45020
56%
**44
92%
ADI Benchmark 8208
<<locked>>
90%
71620
90%
**20
100%
Accurate 2015
<<locked>>
89%
70938
89%
**12
100%
Accurate 2460
<<locked>>
85%
71040
89%
**68
100%
Accurate 2495
<<locked>>
93%
70721
88%
**48
100%
Accurate 2520
<<locked>>
88%
71286
89%
**10
100%
Accurate 2700 👍
<<locked>>
93%
71460
89%
**17
100%
Accurate 3100
<<locked>>
97%
42496
53%
**53
97%
Accurate 4064
<<locked>>
95%
71881
90%
**17
100%
Accurate 4350
<<locked>>
97%
59146
74%
**61
100%
Alliant AR-Comp
<<locked>>
89%
71663
90%
**54
100%
Alliant Power Pro 1200-R
<<locked>>
84%
71634
90%
**19
100%
Alliant Power Pro 2000-MR
<<locked>>
92%
70764
89%
**81
100%
Alliant Reloder- TS 15.5
<<locked>>
96%
71678
90%
**59
100%
Alliant Reloder-10x
<<locked>>
86%
71808
90%
**41
100%
Alliant Reloder-15
<<locked>>
94%
71620
90%
**89
100%
Alliant Reloder-16
<<locked>>
97%
56188
70%
**61
100%
Alliant Reloder-17
<<locked>>
97%
67312
84%
**22
100%
Alliant Reloder-19
<<locked>>
97%
48849
61%
**04
96%
[Alliant Reloder-22]*
<<locked>>
97%
43453
54%
**41
94%
Alliant Reloder-23
<<locked>>
97%
40843
51%
**99
99%
Alliant Reloder-25
<<locked>>
97%
35636
45%
**80
95%
Alliant Reloder-26
<<locked>>
97%
45861
57%
**69
99%
Baschieri & Pellagri 106
<<locked>>
84%
71214
89%
**89
100%
Baschieri & Pellagri 107
<<locked>>
90%
70851
89%
**69
100%
[Bofors RP15]*
<<locked>>
97%
39740
50%
**62
93%
Bofors RP3
<<locked>>
95%
71750
90%
**66
100%
[Bofors RP5]*
<<locked>>
97%
43453
54%
**41
94%
Bofors RP7
<<locked>>
97%
64643
81%
**77
99%
Hodgdon BL-C2
<<locked>>
89%
71417
89%
**50
100%
Hodgdon Benchmark
<<locked>>
90%
71924
90%
**91
100%
Hodgdon CFE223
<<locked>>
86%
71518
89%
**35
100%
Hodgdon H322
<<locked>>
86%
71794
90%
**97
100%
Hodgdon H335
<<locked>>
85%
71750
90%
**14
100%
Hodgdon H380 👍
<<locked>>
95%
71866
90%
**79
100%
Hodgdon H414
<<locked>>
97%
62598
78%
**27
99%
Hodgdon H4350
<<locked>>
97%
67037
84%
**43
99%
[Hodgdon H4831]*
<<locked>>
97%
48211
60%
**61
93%
[Hodgdon H4831 SC]*
<<locked>>
97%
47224
59%
**44
93%
Hodgdon H4895
<<locked>>
90%
70663
88%
**56
100%
Hodgdon Hybrid 100V
<<locked>>
97%
52852
66%
**30
100%
Hodgdon LEVERevolution
<<locked>>
92%
71069
89%
**89
100%
Hodgdon Superformance
<<locked>>
97%
64136
80%
**73
99%
Hodgdon TrailBoss
<<locked>>
96%
33953
42%
**95
100%
Hodgdon VARGET
<<locked>>
92%
71388
89%
**43
100%
IMR 3031
<<locked>>
91%
71605
90%
**17
100%
IMR 4064
<<locked>>
95%
71794
90%
**43
100%
IMR 4166 Enduron 👍
<<locked>>
93%
71649
90%
**40
100%
IMR 4198
<<locked>>
86%
71359
89%
**92
100%
IMR 4350
<<locked>>
97%
57754
72%
**89
98%
IMR 4451 Enduron 👍
<<locked>>
97%
66935
84%
**07
100%
IMR 4831
<<locked>>
97%
55825
70%
**92
100%
IMR 4895
<<locked>>
93%
71214
89%
**89
100%
[IMR 4955 Enduron]*
<<locked>>
97%
49966
63%
**61
94%
IMR 8208 XBR
<<locked>>
90%
71620
90%
**20
100%
Lovex D073.5
<<locked>>
85%
71373
89%
**91
100%
Lovex D073.6
<<locked>>
91%
71663
90%
**23
100%
Lovex S060
<<locked>>
92%
71417
89%
**00
100%
Lovex S062
<<locked>>
95%
71692
90%
**30
100%
Lovex S065
<<locked>>
97%
62323
78%
**45
100%
Lovex S070
<<locked>>
97%
59915
75%
**31
99%
[Lovex S071]*
<<locked>>
96%
35099
44%
**98
94%
Norma 201
<<locked>>
92%
71794
90%
**27
100%
Norma 202
<<locked>>
92%
71866
90%
**00
100%
Norma 203B
<<locked>>
95%
71663
90%
**79
100%
Norma 204
<<locked>>
97%
58566
73%
**48
98%
Norma MRP
<<locked>>
97%
45730
57%
**23
97%
Norma URP
<<locked>>
97%
58305
73%
**48
100%
Ramshot Big Game
<<locked>>
93%
71011
89%
**86
100%
Ramshot Hunter
<<locked>>
97%
56797
71%
**48
99%
[Ramshot Magnum]*
<<locked>>
97%
36941
46%
**64
92%
Ramshot TAC
<<locked>>
90%
71808
90%
**56
100%
Ramshot Wild Boar
<<locked>>
89%
71504
89%
**66
100%
Ramshot X-Terminator
<<locked>>
87%
71040
89%
**17
100%
ReloadSwiss RS 14
<<locked>>
97%
34954
44%
**47
100%
ReloadSwiss RS 40
<<locked>>
86%
71098
89%
**00
100%
ReloadSwiss RS 50 👍
<<locked>>
95%
71156
89%
**63
100%
ReloadSwiss RS 52
<<locked>>
91%
71040
89%
**32
100%
ReloadSwiss RS 60
<<locked>>
97%
71765
90%
**71
100%
ReloadSwiss RS 62
<<locked>>
97%
59915
75%
**97
100%
ReloadSwiss RS 70
<<locked>>
97%
58073
73%
**10
100%
Rottweil R 901
<<locked>>
90%
71127
89%
**81
100%
Rottweil R 902
<<locked>>
94%
71011
89%
**07
100%
Rottweil R 903
<<locked>>
97%
69575
87%
**36
100%
Rottweil R 904
<<locked>>
97%
52040
65%
**00
95%
Rottweil R 905
<<locked>>
97%
48167
60%
**97
96%
Rottweil R 907
<<locked>>
97%
64643
81%
**77
99%
SNPE Vectan BA6 1/2
<<locked>>
85%
71460
89%
**26
100%
SNPE Vectan SP 11
<<locked>>
97%
71895
90%
**02
100%
SNPE Vectan SP 3
<<locked>>
85%
71475
89%
**45
100%
SNPE Vectan SP 7
<<locked>>
90%
70764
89%
**43
100%
SNPE Vectan SP 9
<<locked>>
92%
71228
89%
**56
100%
SNPE Vectan Tubal 3000
<<locked>>
91%
70735
89%
**18
100%
SNPE Vectan Tubal 5000
<<locked>>
96%
70227
88%
**95
100%
SNPE Vectan Tubal 7000
<<locked>>
97%
62149
78%
**86
99%
SNPE Vectan Tubal 8000
<<locked>>
97%
47703
60%
**87
96%
Shooters World Long Rifle
<<locked>>
97%
62323
78%
**45
100%
Shooters World Match Rifle
<<locked>>
91%
71663
90%
**23
100%
Shooters World Precision
<<locked>>
95%
71692
90%
**30
100%
Shooters World SW4350
<<locked>>
97%
59915
75%
**31
99%
Shooters World Tactical Rifle
<<locked>>
84%
71620
90%
**87
100%
Somchem S321
<<locked>>
87%
71272
89%
**30
100%
Somchem S335
<<locked>>
92%
71054
89%
**25
100%
Somchem S341
<<locked>>
90%
71141
89%
**33
100%
Somchem S355
<<locked>>
97%
69270
87%
**30
100%
[Somchem S361]*
<<locked>>
97%
53185
67%
**84
94%
Somchem S365
<<locked>>
97%
53345
67%
**99
100%
Somchem S385
<<locked>>
97%
49153
62%
**77
97%
Vihtavuori N130
<<locked>>
88%
71460
89%
**86
100%
Vihtavuori N133
<<locked>>
91%
70996
89%
**89
100%
Vihtavuori N135
<<locked>>
95%
71721
90%
**61
100%
Vihtavuori N140
<<locked>>
93%
71605
90%
**64
100%
Vihtavuori N150
<<locked>>
97%
67254
84%
**51
100%
Vihtavuori N160
<<locked>>
97%
60350
76%
**45
100%
[Vihtavuori N165]*
<<locked>>
97%
41684
52%
**26
94%
Vihtavuori N530
<<locked>>
89%
70735
89%
**00
100%
Vihtavuori N540
<<locked>>
94%
71591
90%
**91
100%
Vihtavuori N550
<<locked>>
97%
59582
75%
**45
100%
Vihtavuori N555
<<locked>>
97%
45600
57%
**81
99%
[Vihtavuori N560]*
<<locked>>
97%
46485
58%
**10
93%
Winchester 6.5 StaBALL
<<locked>>
97%
61757
77%
**25
100%
Winchester 748
<<locked>>
89%
70880
89%
**53
100%
Winchester 760
<<locked>>
97%
62598
78%
**27
99%
Winchester StaBALL HD
<<locked>>
97%
33127
41%
**95
99%
Winchester StaBALL Match
<<locked>>
92%
71634
90%
**63
100%
Winchester Supreme 780
<<locked>>
97%
45658
57%
**02
95%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
ADI APS 450
<<locked>>
81%
59437
74%
**83
100%
ADI AR 2206H
<<locked>>
81%
51517
64%
**84
100%
ADI AR 2208
<<locked>>
81%
43888
55%
**33
99%
[ADI AR 2209]*
<<locked>>
86%
35288
44%
**02
90%
[ADI AR 2213]*
<<locked>>
93%
40103
50%
**36
90%
ADI Benchmark 8208
<<locked>>
81%
53679
67%
**90
100%
Accurate 2015
<<locked>>
81%
55564
70%
**28
100%
Accurate 2460
<<locked>>
81%
61322
77%
**59
100%
Accurate 2495
<<locked>>
81%
47747
60%
**53
100%
Accurate 2520
<<locked>>
81%
56521
71%
**27
100%
Accurate 2700
<<locked>>
81%
46862
59%
**49
96%
[Accurate 3100]*
<<locked>>
84%
27528
34%
**92
90%
Accurate 4064
<<locked>>
81%
45252
57%
**62
100%
Accurate 4350
<<locked>>
81%
33895
42%
**82
96%
Alliant AR-Comp
<<locked>>
81%
55419
69%
**64
100%
Alliant Power Pro 1200-R
<<locked>>
81%
63788
80%
**10
100%
Alliant Power Pro 2000-MR
<<locked>>
81%
47921
60%
**46
100%
Alliant Reloder- TS 15.5
<<locked>>
81%
43787
55%
**59
100%
Alliant Reloder-10x
<<locked>>
81%
62091
78%
**30
100%
Alliant Reloder-15
<<locked>>
81%
46818
59%
**18
99%
Alliant Reloder-16
<<locked>>
81%
33881
42%
**02
96%
Alliant Reloder-17
<<locked>>
81%
38305
48%
**43
99%
[Alliant Reloder-19]*
<<locked>>
86%
34534
43%
**85
90%
[Alliant Reloder-22]*
<<locked>>
90%
34389
43%
**25
90%
[Alliant Reloder-23]*
<<locked>>
81%
24279
30%
**29
92%
[Alliant Reloder-25]*
<<locked>>
90%
28427
36%
**61
90%
[Alliant Reloder-26]*
<<locked>>
82%
26556
33%
**44
90%
Baschieri & Pellagri 106
<<locked>>
81%
64121
80%
**10
100%
Baschieri & Pellagri 107
<<locked>>
81%
51561
65%
**00
100%
[Bofors RP15]*
<<locked>>
93%
34795
44%
**35
90%
Bofors RP3
<<locked>>
81%
43758
55%
**62
100%
[Bofors RP5]*
<<locked>>
90%
34389
43%
**25
90%
[Bofors RP7]*
<<locked>>
81%
38798
49%
**15
94%
Hodgdon BL-C2
<<locked>>
81%
53403
67%
**17
100%
Hodgdon Benchmark
<<locked>>
81%
55158
69%
**67
100%
Hodgdon CFE223
<<locked>>
81%
59727
75%
**87
100%
Hodgdon H322
<<locked>>
81%
61917
77%
**82
100%
Hodgdon H335
<<locked>>
81%
63222
79%
**09
100%
Hodgdon H380
<<locked>>
81%
44454
56%
**72
98%
[Hodgdon H414]*
<<locked>>
81%
36463
46%
**44
94%
[Hodgdon H4350]*
<<locked>>
81%
39682
50%
**77
93%
[Hodgdon H4831]*
<<locked>>
92%
40698
51%
**00
90%
[Hodgdon H4831 SC]*
<<locked>>
92%
40698
51%
**00
90%
Hodgdon H4895
<<locked>>
81%
52069
65%
**97
100%
Hodgdon Hybrid 100V
<<locked>>
81%
31256
39%
**03
97%
Hodgdon LEVERevolution
<<locked>>
81%
48762
61%
**74
100%
[Hodgdon Superformance]*
<<locked>>
81%
35476
44%
**41
92%
Hodgdon TrailBoss
<<locked>>
81%
27108
34%
**47
100%
Hodgdon VARGET
<<locked>>
81%
50038
63%
**44
100%
IMR 3031
<<locked>>
81%
52736
66%
**87
100%
IMR 4064
<<locked>>
81%
46195
58%
**69
99%
IMR 4166 Enduron
<<locked>>
81%
48878
61%
**08
97%
IMR 4198
<<locked>>
81%
61656
77%
**77
100%
[IMR 4350]*
<<locked>>
81%
34824
44%
**49
92%
IMR 4451 Enduron
<<locked>>
81%
40741
51%
**61
95%
IMR 4831
<<locked>>
81%
32909
41%
**43
96%
IMR 4895
<<locked>>
81%
48080
60%
**58
100%
[IMR 4955 Enduron]*
<<locked>>
90%
39871
50%
**51
90%
IMR 8208 XBR
<<locked>>
81%
53679
67%
**90
100%
Lovex D073.5
<<locked>>
81%
61830
77%
**82
100%
Lovex D073.6
<<locked>>
81%
51372
64%
**61
100%
Lovex S060
<<locked>>
81%
51198
64%
**18
100%
Lovex S062
<<locked>>
81%
46224
58%
**76
100%
Lovex S065
<<locked>>
81%
37710
47%
**02
96%
[Lovex S070]*
<<locked>>
81%
36027
45%
**82
94%
[Lovex S071]*
<<locked>>
89%
27282
34%
**82
90%
Norma 201
<<locked>>
81%
50198
63%
**28
100%
Norma 202
<<locked>>
81%
50894
64%
**31
100%
Norma 203B
<<locked>>
81%
46296
58%
**08
100%
[Norma 204]*
<<locked>>
82%
35215
44%
**82
90%
[Norma MRP]*
<<locked>>
86%
31473
39%
**69
90%
Norma URP
<<locked>>
81%
34272
43%
**92
96%
Ramshot Big Game
<<locked>>
81%
46528
58%
**35
100%
[Ramshot Hunter]*
<<locked>>
81%
33373
42%
**72
93%
[Ramshot Magnum]*
<<locked>>
94%
33910
42%
**89
90%
Ramshot TAC
<<locked>>
81%
54360
68%
**13
99%
Ramshot Wild Boar
<<locked>>
81%
53795
67%
**27
100%
Ramshot X-Terminator
<<locked>>
81%
58175
73%
**49
100%
ReloadSwiss RS 14
<<locked>>
81%
27485
34%
**83
100%
ReloadSwiss RS 40
<<locked>>
81%
60582
76%
**79
100%
ReloadSwiss RS 50
<<locked>>
81%
44759
56%
**53
97%
ReloadSwiss RS 52
<<locked>>
81%
50676
63%
**49
100%
ReloadSwiss RS 60
<<locked>>
81%
40756
51%
**08
100%
ReloadSwiss RS 62
<<locked>>
81%
33823
42%
**02
95%
[ReloadSwiss RS 70]*
<<locked>>
81%
33431
42%
**08
94%
Rottweil R 901
<<locked>>
81%
54230
68%
**61
100%
Rottweil R 902
<<locked>>
81%
47877
60%
**85
100%
Rottweil R 903
<<locked>>
81%
41249
52%
**03
99%
[Rottweil R 904]*
<<locked>>
87%
37855
47%
**18
90%
[Rottweil R 905]*
<<locked>>
87%
34055
43%
**82
90%
[Rottweil R 907]*
<<locked>>
81%
38798
49%
**15
94%
SNPE Vectan BA6 1/2
<<locked>>
81%
65166
82%
**54
100%
SNPE Vectan SP 11
<<locked>>
81%
42554
53%
**66
99%
SNPE Vectan SP 3
<<locked>>
81%
63556
80%
**63
100%
SNPE Vectan SP 7
<<locked>>
81%
52765
66%
**97
99%
SNPE Vectan SP 9
<<locked>>
81%
50183
63%
**58
100%
SNPE Vectan Tubal 3000
<<locked>>
81%
51692
65%
**79
100%
SNPE Vectan Tubal 5000
<<locked>>
81%
43323
54%
**35
100%
[SNPE Vectan Tubal 7000]*
<<locked>>
81%
36912
46%
**43
94%
[SNPE Vectan Tubal 8000]*
<<locked>>
87%
34330
43%
**98
90%
Shooters World Long Rifle
<<locked>>
81%
37710
47%
**02
96%
Shooters World Match Rifle
<<locked>>
81%
51372
64%
**61
100%
Shooters World Precision
<<locked>>
81%
46224
58%
**76
100%
[Shooters World SW4350]*
<<locked>>
81%
36027
45%
**82
94%
Shooters World Tactical Rifle
<<locked>>
81%
63817
80%
**02
100%
Somchem S321
<<locked>>
81%
58972
74%
**82
100%
Somchem S335
<<locked>>
81%
50981
64%
**72
100%
Somchem S341
<<locked>>
81%
52417
66%
**81
100%
Somchem S355
<<locked>>
81%
41655
52%
**10
99%
[Somchem S361]*
<<locked>>
88%
39827
50%
**35
90%
Somchem S365
<<locked>>
81%
30734
38%
**46
98%
[Somchem S385]*
<<locked>>
84%
31183
39%
**87
90%
Vihtavuori N130
<<locked>>
81%
57972
73%
**28
100%
Vihtavuori N133
<<locked>>
81%
52083
65%
**62
100%
Vihtavuori N135
<<locked>>
81%
45658
57%
**23
100%
Vihtavuori N140
<<locked>>
81%
48414
61%
**69
100%
Vihtavuori N150
<<locked>>
81%
39827
50%
**41
100%
Vihtavuori N160
<<locked>>
81%
35636
45%
**98
96%
[Vihtavuori N165]*
<<locked>>
89%
32372
41%
**03
90%
Vihtavuori N530
<<locked>>
81%
54389
68%
**90
100%
Vihtavuori N540
<<locked>>
81%
46499
58%
**53
100%
Vihtavuori N550
<<locked>>
81%
35085
44%
**95
96%
[Vihtavuori N555]*
<<locked>>
81%
26194
33%
**08
93%
[Vihtavuori N560]*
<<locked>>
93%
40640
51%
**79
90%
Winchester 6.5 StaBALL
<<locked>>
81%
35244
44%
**69
98%
Winchester 748
<<locked>>
81%
54505
68%
**40
100%
[Winchester 760]*
<<locked>>
81%
36463
46%
**44
94%
[Winchester StaBALL HD]*
<<locked>>
83%
23221
29%
**33
90%
Winchester StaBALL Match
<<locked>>
81%
50183
63%
**71
100%
[Winchester Supreme 780]*
<<locked>>
89%
34592
43%
**62
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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