top of page

Load data for 7 mm Backcountry + .284 | 158gr | Prvi Partizan Grom

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

7 mm Backcountry + .284 | 158gr | Prvi Partizan Grom

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:
.284 | 158gr | Prvi Partizan Grom
Manufacturer SKU:
B-105
Bullet Weight:
158gr | 10.2g
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_B9123_C991
Last updated:
2026-07-13

Load data for 256 loads in caliber 7 mm Backcountry with .284 | 158gr | Prvi Partizan Grom 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.

    .

    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 APS 450
<<locked>>
92%
71011
89%
**97
101%
ADI AR 2206H
<<locked>>
88%
71852
90%
**86
100%
ADI AR 2208
<<locked>>
93%
71373
89%
**66
100%
ADI AR 2209
<<locked>>
97%
56666
71%
**74
99%
ADI AR 2213
<<locked>>
97%
51082
64%
**15
96%
[ADI AR 2225]*
<<locked>>
97%
32808
41%
**57
93%
ADI Benchmark 8208
<<locked>>
87%
71083
89%
**33
100%
Accurate 2015
<<locked>>
86%
71417
89%
**35
100%
Accurate 2495
<<locked>>
89%
71620
90%
**64
100%
Accurate 2520
<<locked>>
84%
71185
89%
**20
100%
Accurate 2700
<<locked>>
90%
70851
89%
**40
100%
Accurate 3100
<<locked>>
97%
50067
63%
**30
99%
Accurate 4064
<<locked>>
91%
71823
90%
**27
100%
Accurate 4350
<<locked>>
97%
68197
85%
**92
100%
Accurate MAGPRO
<<locked>>
97%
51663
65%
**58
96%
Alliant AR-Comp
<<locked>>
85%
71011
89%
**51
100%
Alliant Power Pro 2000-MR
<<locked>>
89%
71881
90%
**00
100%
Alliant Reloder- TS 15.5
<<locked>>
93%
71779
90%
**69
100%
Alliant Reloder-15
<<locked>>
91%
71692
90%
**99
100%
Alliant Reloder-16
<<locked>>
97%
64687
81%
**99
100%
Alliant Reloder-17
<<locked>>
95%
71098
89%
**68
100%
Alliant Reloder-19
<<locked>>
97%
55970
70%
**64
99%
Alliant Reloder-22
<<locked>>
97%
50024
63%
**18
98%
Alliant Reloder-23
<<locked>>
96%
46847
59%
**43
100%
Alliant Reloder-25
<<locked>>
97%
41060
51%
**71
99%
Alliant Reloder-26
<<locked>>
97%
54534
68%
**49
100%
Baschieri & Pellagri 107
<<locked>>
87%
71431
89%
**92
100%
[Baschieri & Pellagri 109]*
<<locked>>
97%
50589
63%
**23
93%
Bofors RP15
<<locked>>
97%
45818
57%
**40
97%
Bofors RP3
<<locked>>
92%
71692
90%
**69
100%
[Bofors RP30]*
<<locked>>
97%
37217
47%
**82
93%
Bofors RP5
<<locked>>
97%
50024
63%
**18
98%
Bofors RP7
<<locked>>
96%
71141
89%
**86
100%
Hodgdon BL-C2
<<locked>>
86%
71678
90%
**69
100%
Hodgdon Benchmark
<<locked>>
86%
70880
89%
**90
100%
[Hodgdon H1000]*
<<locked>>
97%
40973
51%
**12
94%
Hodgdon H380
<<locked>>
91%
70837
89%
**86
100%
Hodgdon H414 👍
<<locked>>
97%
70401
88%
**48
100%
Hodgdon H4350 👍
<<locked>>
95%
71112
89%
**18
100%
Hodgdon H4831
<<locked>>
97%
54418
68%
**18
97%
Hodgdon H4831 SC
<<locked>>
97%
53621
67%
**02
96%
Hodgdon H4895
<<locked>>
88%
71721
90%
**79
100%
Hodgdon Hybrid 100V
<<locked>>
97%
60263
75%
**51
100%
Hodgdon LEVERevolution
<<locked>>
89%
71098
89%
**92
100%
Hodgdon Retumbo
<<locked>>
97%
40161
50%
**87
95%
Hodgdon Superformance 👍
<<locked>>
96%
71286
89%
**87
100%
Hodgdon TrailBoss
<<locked>>
96%
34519
43%
**93
100%
Hodgdon VARGET
<<locked>>
89%
70793
89%
**49
100%
IMR 3031
<<locked>>
87%
71156
89%
**20
100%
IMR 4064
<<locked>>
91%
70808
89%
**49
100%
IMR 4166 Enduron
<<locked>>
90%
71605
90%
**63
100%
IMR 4198
<<locked>>
83%
71881
90%
**08
100%
IMR 4350
<<locked>>
97%
64527
81%
**13
100%
IMR 4451 Enduron
<<locked>>
96%
71315
89%
**86
100%
IMR 4831
<<locked>>
97%
64179
80%
**27
100%
IMR 4895
<<locked>>
90%
71286
89%
**95
100%
IMR 4955 Enduron
<<locked>>
97%
56057
70%
**02
97%
IMR 7828 SSC
<<locked>>
97%
48907
61%
**92
96%
IMR 8208 XBR
<<locked>>
87%
71083
89%
**33
100%
Lovex D073.6
<<locked>>
87%
71025
89%
**20
100%
Lovex S060
<<locked>>
89%
71141
89%
**10
100%
Lovex S062
<<locked>>
91%
71156
89%
**33
100%
Lovex S065
<<locked>>
96%
68893
86%
**49
100%
Lovex S070
<<locked>>
97%
66819
84%
**49
100%
Lovex S071
<<locked>>
97%
42134
53%
**89
98%
Norma 201
<<locked>>
89%
71562
90%
**33
100%
Norma 202
<<locked>>
88%
71460
89%
**10
100%
Norma 203B
<<locked>>
91%
71924
90%
**92
100%
Norma 204
<<locked>>
97%
65905
82%
**86
99%
Norma MRP
<<locked>>
97%
53272
67%
**94
99%
Norma URP
<<locked>>
97%
66036
83%
**69
100%
Ramshot Big Game
<<locked>>
90%
71518
89%
**05
100%
Ramshot Grand
<<locked>>
97%
48167
60%
**85
96%
Ramshot Hunter
<<locked>>
97%
64498
81%
**72
100%
Ramshot Magnum
<<locked>>
97%
43250
54%
**74
97%
Ramshot TAC
<<locked>>
86%
71054
89%
**72
100%
Ramshot Wild Boar
<<locked>>
86%
71663
90%
**82
100%
Ramshot X-Terminator
<<locked>>
84%
71286
89%
**30
100%
ReloadSwiss RS 14
<<locked>>
96%
35360
44%
**36
100%
ReloadSwiss RS 50
<<locked>>
92%
71272
89%
**86
100%
ReloadSwiss RS 52
<<locked>>
87%
71199
89%
**41
100%
ReloadSwiss RS 60
<<locked>>
93%
70909
89%
**54
100%
ReloadSwiss RS 62
<<locked>>
97%
68617
86%
**15
100%
ReloadSwiss RS 70 👍
<<locked>>
97%
66717
83%
**51
100%
ReloadSwiss RS 76
<<locked>>
97%
39943
50%
**80
97%
Rottweil R 901
<<locked>>
86%
71069
89%
**87
100%
Rottweil R 902
<<locked>>
90%
71243
89%
**20
100%
Rottweil R 903
<<locked>>
94%
70938
89%
**63
100%
Rottweil R 904
<<locked>>
97%
58610
73%
**48
98%
Rottweil R 905
<<locked>>
97%
55201
69%
**48
99%
Rottweil R 907
<<locked>>
96%
71141
89%
**86
100%
SNPE Vectan SP 11
<<locked>>
93%
71794
90%
**09
100%
SNPE Vectan SP 7
<<locked>>
87%
71373
89%
**69
100%
SNPE Vectan SP 9
<<locked>>
89%
71837
90%
**72
100%
SNPE Vectan Tubal 3000
<<locked>>
88%
71286
89%
**41
100%
SNPE Vectan Tubal 5000
<<locked>>
94%
71257
89%
**25
100%
SNPE Vectan Tubal 7000
<<locked>>
97%
69981
88%
**20
100%
SNPE Vectan Tubal 8000
<<locked>>
97%
54723
68%
**41
98%
Shooters World Long Rifle
<<locked>>
96%
68893
86%
**49
100%
Shooters World Match Rifle
<<locked>>
87%
71025
89%
**20
100%
Shooters World Precision
<<locked>>
91%
71156
89%
**33
100%
Shooters World SW4350
<<locked>>
97%
66819
84%
**49
100%
Somchem S321
<<locked>>
84%
71779
90%
**49
100%
Somchem S335
<<locked>>
89%
71605
90%
**48
100%
Somchem S341
<<locked>>
87%
71721
90%
**49
100%
Somchem S355
<<locked>>
94%
70561
88%
**56
100%
Somchem S361
<<locked>>
97%
60278
75%
**38
97%
Somchem S365
<<locked>>
97%
61641
77%
**13
100%
Somchem S385
<<locked>>
97%
56304
70%
**35
99%
Vihtavuori N130
<<locked>>
85%
70721
88%
**89
100%
Vihtavuori N133
<<locked>>
88%
71591
90%
**12
100%
Vihtavuori N135
<<locked>>
92%
71141
89%
**58
100%
Vihtavuori N140
<<locked>>
90%
71794
90%
**81
100%
Vihtavuori N150
<<locked>>
95%
71098
89%
**13
100%
Vihtavuori N160
<<locked>>
97%
68545
86%
**59
100%
Vihtavuori N165
<<locked>>
97%
48428
61%
**97
98%
Vihtavuori N530
<<locked>>
86%
70779
89%
**17
100%
Vihtavuori N540
<<locked>>
91%
71489
89%
**00
100%
Vihtavuori N550
<<locked>>
97%
67617
85%
**76
100%
Vihtavuori N555
<<locked>>
97%
52750
66%
**22
100%
Vihtavuori N560
<<locked>>
97%
53664
67%
**84
97%
[Vihtavuori N565]*
<<locked>>
97%
42627
53%
**74
94%
Winchester 6.5 StaBALL
<<locked>>
97%
69314
87%
**30
100%
Winchester 748
<<locked>>
85%
71069
89%
**59
100%
Winchester 760 👍
<<locked>>
97%
70996
89%
**51
100%
Winchester StaBALL HD
<<locked>>
97%
41655
52%
**95
100%
Winchester StaBALL Match
<<locked>>
88%
71141
89%
**63
100%
Winchester Supreme 780
<<locked>>
97%
52315
65%
**69
98%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
ADI APS 450
<<locked>>
81%
59785
75%
**52
100%
ADI AR 2206H
<<locked>>
81%
57769
72%
**05
100%
ADI AR 2208
<<locked>>
81%
48820
61%
**61
100%
[ADI AR 2209]*
<<locked>>
81%
33953
42%
**31
92%
[ADI AR 2213]*
<<locked>>
85%
34954
44%
**64
90%
[ADI AR 2225]*
<<locked>>
93%
29370
37%
**56
90%
ADI Benchmark 8208
<<locked>>
81%
59901
75%
**99
100%
Accurate 2015
<<locked>>
81%
62018
78%
**30
100%
Accurate 2495
<<locked>>
81%
55187
69%
**74
100%
Accurate 2520
<<locked>>
81%
63643
80%
**38
100%
Accurate 2700
<<locked>>
81%
52518
66%
**97
99%
[Accurate 3100]*
<<locked>>
81%
29443
37%
**00
94%
Accurate 4064
<<locked>>
81%
52330
65%
**84
100%
Accurate 4350
<<locked>>
81%
40089
50%
**62
99%
[Accurate MAGPRO]*
<<locked>>
87%
36608
46%
**52
90%
Alliant AR-Comp
<<locked>>
81%
62105
78%
**56
100%
Alliant Power Pro 2000-MR
<<locked>>
81%
54737
69%
**81
100%
Alliant Reloder- TS 15.5
<<locked>>
81%
49908
62%
**90
100%
Alliant Reloder-15
<<locked>>
81%
53040
66%
**56
100%
Alliant Reloder-16
<<locked>>
81%
38696
48%
**72
99%
Alliant Reloder-17
<<locked>>
81%
44382
56%
**03
100%
[Alliant Reloder-19]*
<<locked>>
81%
33823
42%
**28
92%
[Alliant Reloder-22]*
<<locked>>
82%
30545
38%
**79
90%
Alliant Reloder-23
<<locked>>
81%
28471
36%
**29
97%
[Alliant Reloder-25]*
<<locked>>
81%
25063
31%
**21
90%
Alliant Reloder-26
<<locked>>
81%
30458
38%
**48
96%
Baschieri & Pellagri 107
<<locked>>
81%
57537
72%
**25
100%
[Baschieri & Pellagri 109]*
<<locked>>
92%
44266
55%
**98
90%
[Bofors RP15]*
<<locked>>
84%
30574
38%
**82
90%
Bofors RP3
<<locked>>
81%
49980
63%
**97
100%
[Bofors RP30]*
<<locked>>
93%
32677
41%
**64
90%
[Bofors RP5]*
<<locked>>
82%
30545
38%
**79
90%
Bofors RP7
<<locked>>
81%
43947
55%
**79
97%
Hodgdon BL-C2
<<locked>>
81%
60292
75%
**31
100%
Hodgdon Benchmark
<<locked>>
81%
61061
76%
**76
100%
[Hodgdon H1000]*
<<locked>>
91%
33779
42%
**31
90%
Hodgdon H380
<<locked>>
81%
50633
63%
**17
100%
Hodgdon H414
<<locked>>
81%
41858
52%
**12
97%
Hodgdon H4350
<<locked>>
81%
44773
56%
**28
97%
[Hodgdon H4831]*
<<locked>>
84%
36042
45%
**54
90%
[Hodgdon H4831 SC]*
<<locked>>
85%
36042
45%
**54
90%
Hodgdon H4895
<<locked>>
81%
58407
73%
**15
100%
Hodgdon Hybrid 100V
<<locked>>
81%
36172
45%
**61
99%
Hodgdon LEVERevolution
<<locked>>
81%
55158
69%
**02
100%
[Hodgdon Retumbo]*
<<locked>>
89%
31531
39%
**54
90%
Hodgdon Superformance
<<locked>>
81%
41075
51%
**25
97%
Hodgdon TrailBoss
<<locked>>
81%
27702
35%
**52
100%
Hodgdon VARGET
<<locked>>
81%
55912
70%
**62
100%
IMR 3031
<<locked>>
81%
59321
74%
**89
100%
IMR 4064
<<locked>>
81%
51430
64%
**94
100%
IMR 4166 Enduron
<<locked>>
81%
54027
68%
**26
99%
IMR 4198
<<locked>>
81%
67602
85%
**59
100%
IMR 4350
<<locked>>
81%
39378
49%
**07
96%
IMR 4451 Enduron
<<locked>>
81%
45469
57%
**08
98%
IMR 4831
<<locked>>
81%
38522
48%
**23
99%
IMR 4895
<<locked>>
81%
54476
68%
**82
100%
[IMR 4955 Enduron]*
<<locked>>
81%
34679
43%
**92
90%
[IMR 7828 SSC]*
<<locked>>
86%
34548
43%
**70
90%
IMR 8208 XBR
<<locked>>
81%
59901
75%
**99
100%
Lovex D073.6
<<locked>>
81%
58494
73%
**82
100%
Lovex S060
<<locked>>
81%
56217
70%
**23
100%
Lovex S062
<<locked>>
81%
51764
65%
**87
100%
Lovex S065
<<locked>>
81%
42873
54%
**56
98%
Lovex S070
<<locked>>
81%
41017
51%
**43
97%
[Lovex S071]*
<<locked>>
81%
25222
32%
**82
91%
Norma 201
<<locked>>
81%
56434
71%
**49
100%
Norma 202
<<locked>>
81%
57261
72%
**43
100%
Norma 203B
<<locked>>
81%
52533
66%
**46
100%
[Norma 204]*
<<locked>>
81%
38769
49%
**26
94%
[Norma MRP]*
<<locked>>
81%
30864
39%
**11
92%
Norma URP
<<locked>>
81%
39552
49%
**59
99%
Ramshot Big Game
<<locked>>
81%
52895
66%
**66
100%
[Ramshot Grand]*
<<locked>>
87%
34316
43%
**77
90%
Ramshot Hunter
<<locked>>
81%
38435
48%
**49
97%
[Ramshot Magnum]*
<<locked>>
86%
29399
37%
**33
90%
Ramshot TAC
<<locked>>
81%
59915
75%
**31
100%
Ramshot Wild Boar
<<locked>>
81%
60466
76%
**44
100%
Ramshot X-Terminator
<<locked>>
81%
64179
80%
**51
100%
ReloadSwiss RS 14
<<locked>>
81%
28543
36%
**98
100%
ReloadSwiss RS 50
<<locked>>
81%
50531
63%
**00
99%
ReloadSwiss RS 52
<<locked>>
81%
57450
72%
**74
100%
ReloadSwiss RS 60
<<locked>>
81%
47123
59%
**53
100%
ReloadSwiss RS 62
<<locked>>
81%
39827
50%
**79
99%
ReloadSwiss RS 70
<<locked>>
81%
38537
48%
**92
98%
[ReloadSwiss RS 76]*
<<locked>>
88%
29544
37%
**88
90%
Rottweil R 901
<<locked>>
81%
60771
76%
**66
100%
Rottweil R 902
<<locked>>
81%
53534
67%
**03
100%
Rottweil R 903
<<locked>>
81%
47166
59%
**44
100%
[Rottweil R 904]*
<<locked>>
81%
35244
44%
**18
91%
[Rottweil R 905]*
<<locked>>
81%
32663
41%
**05
92%
Rottweil R 907
<<locked>>
81%
43947
55%
**79
97%
SNPE Vectan SP 11
<<locked>>
81%
48399
61%
**03
100%
SNPE Vectan SP 7
<<locked>>
81%
59030
74%
**15
100%
SNPE Vectan SP 9
<<locked>>
81%
55883
70%
**76
100%
SNPE Vectan Tubal 3000
<<locked>>
81%
56956
71%
**74
100%
SNPE Vectan Tubal 5000
<<locked>>
81%
48153
60%
**43
100%
SNPE Vectan Tubal 7000
<<locked>>
81%
42264
53%
**07
97%
[SNPE Vectan Tubal 8000]*
<<locked>>
81%
32358
40%
**98
92%
Shooters World Long Rifle
<<locked>>
81%
42873
54%
**56
98%
Shooters World Match Rifle
<<locked>>
81%
58494
73%
**82
100%
Shooters World Precision
<<locked>>
81%
51764
65%
**87
100%
Shooters World SW4350
<<locked>>
81%
41017
51%
**43
97%
Somchem S321
<<locked>>
81%
65470
82%
**74
100%
Somchem S335
<<locked>>
81%
56869
71%
**74
100%
Somchem S341
<<locked>>
81%
58581
73%
**92
100%
Somchem S355
<<locked>>
81%
47427
59%
**44
100%
[Somchem S361]*
<<locked>>
81%
35955
45%
**11
91%
Somchem S365
<<locked>>
81%
36042
45%
**16
100%
[Somchem S385]*
<<locked>>
81%
33330
42%
**92
93%
Vihtavuori N130
<<locked>>
81%
63512
79%
**10
100%
Vihtavuori N133
<<locked>>
81%
57435
72%
**54
100%
Vihtavuori N135
<<locked>>
81%
51401
64%
**31
100%
Vihtavuori N140
<<locked>>
81%
54215
68%
**77
100%
Vihtavuori N150
<<locked>>
81%
45252
57%
**72
100%
Vihtavuori N160
<<locked>>
81%
41133
51%
**59
99%
[Vihtavuori N165]*
<<locked>>
81%
28863
36%
**70
90%
Vihtavuori N530
<<locked>>
81%
60365
76%
**95
100%
Vihtavuori N540
<<locked>>
81%
52446
66%
**71
100%
Vihtavuori N550
<<locked>>
81%
40727
51%
**59
99%
Vihtavuori N555
<<locked>>
81%
31633
40%
**08
97%
[Vihtavuori N560]*
<<locked>>
85%
35636
45%
**16
90%
[Vihtavuori N565]*
<<locked>>
90%
34171
43%
**84
90%
Winchester 6.5 StaBALL
<<locked>>
81%
40176
50%
**23
100%
Winchester 748
<<locked>>
81%
61569
77%
**51
100%
Winchester 760
<<locked>>
81%
42264
53%
**18
97%
Winchester StaBALL HD
<<locked>>
81%
25048
31%
**00
96%
Winchester StaBALL Match
<<locked>>
81%
56246
70%
**82
100%
[Winchester Supreme 780]*
<<locked>>
81%
30371
38%
**16
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

bottom of page