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Load data for 7 mm Backcountry + .284 | 145gr | Speer Boat-Tail

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

7 mm Backcountry + .284 | 145gr | Speer Boat-Tail

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:
.284 | 145gr | Speer Boat-Tail
Manufacturer SKU:
1628
Bullet Weight:
145gr | 9.4g
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_B6124_C991
Last updated:
2026-07-16
Recommended Twist Rate:
1:12 - 1:10

Load data for 256 loads in caliber 7 mm Backcountry with .284 | 145gr | Speer Boat-Tail bullet and 128 powders such as Hodgdon H414, Hodgdon H4350, Hodgdon Superformance, 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%
71257
89%
**18
101%
ADI AR 2206H
<<locked>>
89%
71721
90%
**10
100%
ADI AR 2208
<<locked>>
94%
70996
89%
**97
100%
ADI AR 2209
<<locked>>
97%
54897
69%
**66
98%
ADI AR 2213
<<locked>>
97%
49327
62%
**90
95%
ADI Benchmark 8208
<<locked>>
87%
71156
89%
**64
100%
Accurate 2015
<<locked>>
87%
71402
89%
**66
100%
Accurate 2495
<<locked>>
90%
70996
89%
**92
100%
Accurate 2520
<<locked>>
85%
71359
89%
**58
100%
Accurate 2700
<<locked>>
91%
71591
90%
**74
100%
Accurate 3100
<<locked>>
97%
48196
60%
**12
99%
Accurate 4064
<<locked>>
92%
70808
89%
**48
100%
Accurate 4350
<<locked>>
97%
66079
83%
**00
100%
[Accurate MAGPRO]*
<<locked>>
97%
49763
62%
**33
94%
Alliant AR-Comp
<<locked>>
86%
71185
89%
**92
100%
Alliant Power Pro 2000-MR
<<locked>>
90%
71823
90%
**35
100%
Alliant Reloder- TS 15.5
<<locked>>
93%
70735
89%
**97
100%
Alliant Reloder-10x
<<locked>>
83%
71170
89%
**76
100%
Alliant Reloder-15
<<locked>>
91%
71214
89%
**30
100%
Alliant Reloder-16
<<locked>>
97%
62772
79%
**97
100%
Alliant Reloder-17
<<locked>>
95%
70866
89%
**05
100%
Alliant Reloder-19
<<locked>>
97%
54302
68%
**56
98%
Alliant Reloder-22
<<locked>>
97%
48399
61%
**00
97%
Alliant Reloder-23
<<locked>>
97%
45687
57%
**41
100%
Alliant Reloder-25
<<locked>>
97%
39798
50%
**49
98%
Alliant Reloder-26
<<locked>>
97%
52228
65%
**31
100%
Baschieri & Pellagri 107
<<locked>>
88%
71286
89%
**23
100%
Bofors RP15
<<locked>>
97%
44237
55%
**18
95%
Bofors RP3
<<locked>>
92%
70967
89%
**04
100%
Bofors RP5
<<locked>>
97%
48399
61%
**00
97%
Bofors RP7
<<locked>>
97%
70343
88%
**00
100%
Hodgdon BL-C2
<<locked>>
87%
71301
89%
**97
100%
Hodgdon Benchmark
<<locked>>
87%
71199
89%
**25
100%
Hodgdon CFE223
<<locked>>
83%
71170
89%
**79
100%
[Hodgdon H1000]*
<<locked>>
97%
39653
50%
**77
92%
Hodgdon H380
<<locked>>
92%
71431
89%
**27
100%
Hodgdon H414 👍
<<locked>>
97%
69227
87%
**66
100%
Hodgdon H4350 👍
<<locked>>
96%
71199
89%
**56
100%
Hodgdon H4831
<<locked>>
97%
53113
66%
**07
95%
Hodgdon H4831 SC
<<locked>>
97%
51750
65%
**81
95%
Hodgdon H4895
<<locked>>
88%
71634
90%
**07
100%
Hodgdon Hybrid 100V
<<locked>>
97%
58566
73%
**59
100%
Hodgdon LEVERevolution
<<locked>>
89%
70866
89%
**30
100%
[Hodgdon Retumbo]*
<<locked>>
97%
38827
49%
**62
94%
Hodgdon Superformance 👍
<<locked>>
97%
71069
89%
**15
100%
Hodgdon TrailBoss
<<locked>>
97%
34795
44%
**85
100%
Hodgdon VARGET
<<locked>>
90%
71895
90%
**00
100%
IMR 3031
<<locked>>
88%
71678
90%
**61
100%
IMR 4064
<<locked>>
93%
71707
90%
**87
100%
IMR 4166 Enduron
<<locked>>
91%
71272
89%
**97
100%
IMR 4198
<<locked>>
84%
71069
89%
**36
100%
IMR 4350
<<locked>>
97%
62714
78%
**15
99%
IMR 4451 Enduron
<<locked>>
97%
71881
90%
**30
100%
IMR 4831
<<locked>>
97%
62178
78%
**28
100%
IMR 4895
<<locked>>
90%
70938
89%
**27
100%
IMR 4955 Enduron
<<locked>>
97%
54476
68%
**90
96%
[IMR 7828 SSC]*
<<locked>>
97%
47210
59%
**67
94%
IMR 8208 XBR
<<locked>>
87%
71156
89%
**64
100%
Lovex D073.6
<<locked>>
88%
71721
90%
**68
100%
Lovex S060
<<locked>>
90%
71301
89%
**48
100%
Lovex S062
<<locked>>
93%
71924
90%
**81
100%
Lovex S065
<<locked>>
97%
67588
85%
**64
100%
Lovex S070
<<locked>>
97%
65180
82%
**58
100%
Lovex S071
<<locked>>
97%
40190
50%
**57
97%
Norma 201
<<locked>>
89%
70953
89%
**64
100%
Norma 202
<<locked>>
89%
71924
90%
**51
100%
Norma 203B
<<locked>>
92%
71446
89%
**20
100%
Norma 204
<<locked>>
97%
64237
80%
**81
99%
Norma MRP
<<locked>>
97%
51184
64%
**79
99%
Norma URP
<<locked>>
97%
64063
80%
**74
100%
Ramshot Big Game
<<locked>>
91%
71823
90%
**40
100%
Ramshot Grand
<<locked>>
97%
47021
59%
**71
95%
Ramshot Hunter
<<locked>>
97%
62627
78%
**77
100%
Ramshot Magnum
<<locked>>
97%
41510
52%
**46
95%
Ramshot TAC
<<locked>>
87%
71127
89%
**07
100%
Ramshot Wild Boar
<<locked>>
87%
71576
90%
**10
100%
Ramshot X-Terminator
<<locked>>
85%
71388
89%
**71
100%
ReloadSwiss RS 14
<<locked>>
97%
35534
44%
**31
100%
ReloadSwiss RS 40
<<locked>>
84%
71388
89%
**48
100%
ReloadSwiss RS 50
<<locked>>
93%
71605
90%
**17
100%
ReloadSwiss RS 52
<<locked>>
88%
71373
89%
**79
100%
ReloadSwiss RS 60
<<locked>>
94%
71794
90%
**02
100%
ReloadSwiss RS 62
<<locked>>
97%
66529
83%
**23
100%
ReloadSwiss RS 70 👍
<<locked>>
97%
65050
81%
**66
100%
ReloadSwiss RS 76
<<locked>>
97%
38595
48%
**49
95%
Rottweil R 901
<<locked>>
88%
71837
90%
**35
100%
Rottweil R 902
<<locked>>
91%
71185
89%
**58
100%
Rottweil R 903
<<locked>>
95%
71257
89%
**04
100%
Rottweil R 904
<<locked>>
97%
56956
71%
**43
97%
Rottweil R 905
<<locked>>
97%
53359
67%
**36
98%
Rottweil R 907
<<locked>>
97%
70343
88%
**00
100%
SNPE Vectan SP 11
<<locked>>
94%
71562
90%
**40
100%
SNPE Vectan SP 7
<<locked>>
87%
71489
89%
**97
100%
SNPE Vectan SP 9
<<locked>>
90%
71823
90%
**10
100%
SNPE Vectan Tubal 3000
<<locked>>
89%
71895
90%
**79
100%
SNPE Vectan Tubal 5000
<<locked>>
94%
71185
89%
**53
100%
SNPE Vectan Tubal 7000
<<locked>>
97%
68211
85%
**22
100%
SNPE Vectan Tubal 8000
<<locked>>
97%
52895
66%
**30
98%
Shooters World Long Rifle
<<locked>>
97%
67588
85%
**64
100%
Shooters World Match Rifle
<<locked>>
88%
71721
90%
**68
100%
Shooters World Precision
<<locked>>
93%
71924
90%
**81
100%
Shooters World SW4350
<<locked>>
97%
65180
82%
**58
100%
Somchem S321
<<locked>>
84%
71098
89%
**71
100%
Somchem S335
<<locked>>
89%
71069
89%
**76
100%
Somchem S341
<<locked>>
88%
71634
90%
**84
100%
Somchem S355
<<locked>>
95%
71678
90%
**00
100%
Somchem S361
<<locked>>
97%
59176
74%
**46
97%
Somchem S365
<<locked>>
97%
59466
74%
**28
100%
Somchem S385
<<locked>>
97%
54302
68%
**23
98%
Vihtavuori N130
<<locked>>
86%
71475
89%
**33
100%
Vihtavuori N133
<<locked>>
89%
70996
89%
**43
100%
Vihtavuori N135
<<locked>>
92%
71185
89%
**99
100%
Vihtavuori N140
<<locked>>
91%
71562
90%
**15
100%
Vihtavuori N150
<<locked>>
96%
71605
90%
**51
100%
Vihtavuori N160
<<locked>>
97%
66630
83%
**68
100%
Vihtavuori N165
<<locked>>
97%
46731
58%
**79
97%
Vihtavuori N530
<<locked>>
87%
70866
89%
**54
100%
Vihtavuori N540
<<locked>>
91%
71098
89%
**35
100%
Vihtavuori N550
<<locked>>
97%
65528
82%
**77
100%
Vihtavuori N555
<<locked>>
97%
51271
64%
**23
100%
Vihtavuori N560
<<locked>>
97%
51706
65%
**69
95%
[Vihtavuori N565]*
<<locked>>
97%
40683
51%
**43
92%
Winchester 6.5 StaBALL
<<locked>>
97%
67312
84%
**35
100%
Winchester 748
<<locked>>
86%
70706
88%
**94
100%
Winchester 760 👍
<<locked>>
97%
68690
86%
**63
100%
Winchester StaBALL HD
<<locked>>
97%
39465
49%
**74
100%
Winchester StaBALL Match
<<locked>>
89%
71127
89%
**00
100%
Winchester Supreme 780
<<locked>>
97%
50459
63%
**51
97%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
ADI APS 450
<<locked>>
81%
59553
75%
**57
100%
ADI AR 2206H
<<locked>>
81%
56333
70%
**17
100%
ADI AR 2208
<<locked>>
81%
47790
60%
**62
100%
[ADI AR 2209]*
<<locked>>
81%
32909
41%
**00
90%
[ADI AR 2213]*
<<locked>>
89%
37710
47%
**41
90%
ADI Benchmark 8208
<<locked>>
81%
58450
73%
**13
100%
Accurate 2015
<<locked>>
81%
60379
76%
**38
100%
Accurate 2495
<<locked>>
81%
53243
67%
**82
100%
Accurate 2520
<<locked>>
81%
62178
78%
**49
100%
Accurate 2700
<<locked>>
81%
51169
64%
**82
98%
[Accurate 3100]*
<<locked>>
81%
28340
35%
**72
92%
Accurate 4064
<<locked>>
81%
50473
63%
**89
100%
Accurate 4350
<<locked>>
81%
38711
48%
**51
98%
[Accurate MAGPRO]*
<<locked>>
90%
39813
50%
**33
90%
Alliant AR-Comp
<<locked>>
81%
60669
76%
**74
100%
Alliant Power Pro 2000-MR
<<locked>>
81%
52881
66%
**76
100%
Alliant Reloder- TS 15.5
<<locked>>
81%
48080
60%
**82
100%
Alliant Reloder-10x
<<locked>>
81%
66892
84%
**30
100%
Alliant Reloder-15
<<locked>>
81%
51619
65%
**54
100%
Alliant Reloder-16
<<locked>>
81%
37565
47%
**54
98%
Alliant Reloder-17
<<locked>>
81%
42743
53%
**89
100%
[Alliant Reloder-19]*
<<locked>>
81%
32808
41%
**00
90%
[Alliant Reloder-22]*
<<locked>>
85%
32532
41%
**36
90%
Alliant Reloder-23
<<locked>>
81%
27427
34%
**95
96%
[Alliant Reloder-25]*
<<locked>>
84%
26701
33%
**69
90%
[Alliant Reloder-26]*
<<locked>>
81%
29428
37%
**07
94%
Baschieri & Pellagri 107
<<locked>>
81%
56072
70%
**23
100%
[Bofors RP15]*
<<locked>>
87%
32837
41%
**36
90%
Bofors RP3
<<locked>>
81%
48457
61%
**99
100%
[Bofors RP5]*
<<locked>>
85%
32532
41%
**36
90%
Bofors RP7
<<locked>>
81%
42888
54%
**71
96%
Hodgdon BL-C2
<<locked>>
81%
58523
73%
**36
100%
Hodgdon Benchmark
<<locked>>
81%
59669
75%
**87
100%
Hodgdon CFE223
<<locked>>
81%
65659
82%
**07
100%
[Hodgdon H1000]*
<<locked>>
94%
36013
45%
**85
90%
Hodgdon H380
<<locked>>
81%
49095
61%
**12
99%
Hodgdon H414
<<locked>>
81%
40509
51%
**87
96%
Hodgdon H4350
<<locked>>
81%
43453
54%
**10
95%
[Hodgdon H4831]*
<<locked>>
87%
37971
48%
**02
90%
[Hodgdon H4831 SC]*
<<locked>>
88%
38319
48%
**08
90%
Hodgdon H4895
<<locked>>
81%
56942
71%
**17
100%
Hodgdon Hybrid 100V
<<locked>>
81%
35143
44%
**49
99%
Hodgdon LEVERevolution
<<locked>>
81%
53592
67%
**04
100%
[Hodgdon Retumbo]*
<<locked>>
92%
33794
42%
**12
90%
Hodgdon Superformance
<<locked>>
81%
39653
50%
**00
95%
Hodgdon TrailBoss
<<locked>>
81%
27557
34%
**31
100%
Hodgdon VARGET
<<locked>>
81%
54563
68%
**74
100%
IMR 3031
<<locked>>
81%
57305
72%
**97
100%
IMR 4064
<<locked>>
81%
50328
63%
**99
100%
IMR 4166 Enduron
<<locked>>
81%
52707
66%
**31
99%
IMR 4198
<<locked>>
81%
65717
82%
**74
100%
IMR 4350
<<locked>>
81%
38276
48%
**89
95%
IMR 4451 Enduron
<<locked>>
81%
44266
55%
**97
97%
IMR 4831
<<locked>>
81%
37304
47%
**02
98%
IMR 4895
<<locked>>
81%
53026
66%
**90
100%
[IMR 4955 Enduron]*
<<locked>>
84%
37144
46%
**46
90%
[IMR 7828 SSC]*
<<locked>>
90%
37246
47%
**38
90%
IMR 8208 XBR
<<locked>>
81%
58450
73%
**13
100%
Lovex D073.6
<<locked>>
81%
56797
71%
**81
100%
Lovex S060
<<locked>>
81%
55114
69%
**31
100%
Lovex S062
<<locked>>
81%
50618
63%
**92
100%
Lovex S065
<<locked>>
81%
41437
52%
**38
98%
Lovex S070
<<locked>>
81%
39798
50%
**25
96%
[Lovex S071]*
<<locked>>
83%
25991
33%
**00
90%
Norma 201
<<locked>>
81%
54723
68%
**51
100%
Norma 202
<<locked>>
81%
55622
70%
**48
100%
Norma 203B
<<locked>>
81%
51111
64%
**41
100%
[Norma 204]*
<<locked>>
81%
37884
47%
**15
93%
[Norma MRP]*
<<locked>>
81%
29631
37%
**70
90%
Norma URP
<<locked>>
81%
38363
48%
**41
98%
Ramshot Big Game
<<locked>>
81%
51227
64%
**61
100%
[Ramshot Grand]*
<<locked>>
89%
36172
45%
**28
90%
Ramshot Hunter
<<locked>>
81%
37260
47%
**21
96%
[Ramshot Magnum]*
<<locked>>
89%
31575
40%
**87
90%
Ramshot TAC
<<locked>>
81%
58537
73%
**33
100%
Ramshot Wild Boar
<<locked>>
81%
58914
74%
**49
100%
Ramshot X-Terminator
<<locked>>
81%
62555
78%
**59
100%
ReloadSwiss RS 14
<<locked>>
81%
28326
35%
**77
100%
ReloadSwiss RS 40
<<locked>>
81%
65151
82%
**79
100%
ReloadSwiss RS 50
<<locked>>
81%
49081
61%
**95
99%
ReloadSwiss RS 52
<<locked>>
81%
56115
70%
**82
100%
ReloadSwiss RS 60
<<locked>>
81%
45266
57%
**41
100%
ReloadSwiss RS 62
<<locked>>
81%
38421
48%
**67
98%
ReloadSwiss RS 70
<<locked>>
81%
37101
46%
**61
97%
[ReloadSwiss RS 76]*
<<locked>>
91%
32082
40%
**56
90%
Rottweil R 901
<<locked>>
81%
59059
74%
**77
100%
Rottweil R 902
<<locked>>
81%
52460
66%
**12
100%
Rottweil R 903
<<locked>>
81%
45876
57%
**40
100%
[Rottweil R 904]*
<<locked>>
82%
35302
44%
**20
90%
[Rottweil R 905]*
<<locked>>
81%
31618
40%
**77
90%
Rottweil R 907
<<locked>>
81%
42888
54%
**71
96%
SNPE Vectan SP 11
<<locked>>
81%
47079
59%
**02
100%
SNPE Vectan SP 7
<<locked>>
81%
57580
72%
**17
100%
SNPE Vectan SP 9
<<locked>>
81%
54824
69%
**87
100%
SNPE Vectan Tubal 3000
<<locked>>
81%
55811
70%
**89
100%
SNPE Vectan Tubal 5000
<<locked>>
81%
47311
59%
**54
100%
SNPE Vectan Tubal 7000
<<locked>>
81%
40654
51%
**89
96%
[SNPE Vectan Tubal 8000]*
<<locked>>
81%
31792
40%
**80
90%
Shooters World Long Rifle
<<locked>>
81%
41437
52%
**38
98%
Shooters World Match Rifle
<<locked>>
81%
56797
71%
**81
100%
Shooters World Precision
<<locked>>
81%
50618
63%
**92
100%
Shooters World SW4350
<<locked>>
81%
39798
50%
**25
96%
Somchem S321
<<locked>>
81%
63991
80%
**92
100%
Somchem S335
<<locked>>
81%
55129
69%
**79
100%
Somchem S341
<<locked>>
81%
57130
71%
**04
100%
Somchem S355
<<locked>>
81%
45832
57%
**36
100%
[Somchem S361]*
<<locked>>
83%
37304
47%
**43
90%
Somchem S365
<<locked>>
81%
34766
44%
**95
100%
[Somchem S385]*
<<locked>>
81%
32169
40%
**67
92%
Vihtavuori N130
<<locked>>
81%
62410
78%
**31
100%
Vihtavuori N133
<<locked>>
81%
56507
71%
**72
100%
Vihtavuori N135
<<locked>>
81%
50241
63%
**36
100%
Vihtavuori N140
<<locked>>
81%
52663
66%
**79
100%
Vihtavuori N150
<<locked>>
81%
43932
55%
**67
100%
Vihtavuori N160
<<locked>>
81%
39856
50%
**41
98%
[Vihtavuori N165]*
<<locked>>
84%
30734
38%
**18
90%
Vihtavuori N530
<<locked>>
81%
58813
74%
**00
100%
Vihtavuori N540
<<locked>>
81%
50966
64%
**79
100%
Vihtavuori N550
<<locked>>
81%
39349
49%
**44
98%
Vihtavuori N555
<<locked>>
81%
30255
38%
**74
96%
[Vihtavuori N560]*
<<locked>>
87%
37579
47%
**71
90%
[Vihtavuori N565]*
<<locked>>
93%
36347
45%
**44
90%
Winchester 6.5 StaBALL
<<locked>>
81%
38957
49%
**05
100%
Winchester 748
<<locked>>
81%
59712
75%
**59
100%
Winchester 760
<<locked>>
81%
40886
51%
**03
96%
[Winchester StaBALL HD]*
<<locked>>
81%
24366
30%
**56
93%
Winchester StaBALL Match
<<locked>>
81%
54984
69%
**87
100%
[Winchester Supreme 780]*
<<locked>>
84%
32460
41%
**67
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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