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Load data for .270 Win. Ackley Improved + .277 | 150gr | Sierra RN Prohunter

Recommended Powder(s): Hodgdon H414, Hodgdon Superperformance, Ramshot Hunter, ReloadSwiss RS 70, Winchester 760

.270 Win. Ackley Improved + .277 | 150gr | Sierra RN Prohunter

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:
.277 | 150gr | Sierra RN Prohunter
Manufacturer SKU:
1850
Bullet Weight:
150gr | 9.7g
Bullet Diameter:
0.277" | 7.04mm
Bullet Length:
1.100" | 27.9mm
Caliber:
.270 Win. Ackley Improved load data
Case Length (l3):
2.540" | 64.5mm
Cartridge Length (C.O.L.):
3.290" | 83.6mm
Seated Depth:
0.350" | 8.9mm
Shank Seated Depth:
0.350" | 8.9mm
Case Capacity:
70.0 Grains of Water | 4.55 cm³
Primer Size:
Large Rifle (LR)
Max. allowed Pressure:
72519 psi | 5000 bar
LID:
LID_B5833_C272
Last updated:
2026-01-12

Load data for 216 loads in caliber .270 Win. Ackley Improved with .277 | 150gr | Sierra RN Prohunter bullet and 108 powders such as Hodgdon H414, Hodgdon Superperformance, Ramshot Hunter, 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>>
86%
64803
89%
**31
101%
ADI AR 2206H
<<locked>>
84%
64440
89%
**07
100%
ADI AR 2208
<<locked>>
90%
64643
89%
**94
100%
ADI AR 2209
<<locked>>
97%
57319
79%
**94
99%
ADI AR 2213
<<locked>>
97%
51808
71%
**38
97%
[ADI AR 2217]*
<<locked>>
97%
37942
52%
**43
92%
[ADI AR 2225]*
<<locked>>
97%
33243
46%
**80
93%
Accurate 2200
<<locked>>
83%
64875
89%
**87
100%
Accurate 2700
<<locked>>
90%
64281
89%
**61
100%
Accurate 3100
<<locked>>
97%
50778
70%
**46
99%
Accurate 4064
<<locked>>
87%
64469
89%
**51
100%
Accurate 4350
<<locked>>
94%
64469
89%
**59
100%
[Accurate MAGPRO]*
<<locked>>
97%
50024
69%
**28
94%
Alliant Reloder- TS 15.5
<<locked>>
89%
64600
89%
**00
100%
Alliant Reloder-15
<<locked>>
87%
64455
89%
**23
100%
Alliant Reloder-16
<<locked>>
96%
64934
90%
**09
100%
Alliant Reloder-17
<<locked>>
91%
64730
89%
**99
100%
Alliant Reloder-19
<<locked>>
97%
56811
78%
**84
99%
Alliant Reloder-22
<<locked>>
97%
51155
71%
**35
98%
Alliant Reloder-23
<<locked>>
97%
48501
67%
**82
100%
Alliant Reloder-25
<<locked>>
97%
41727
58%
**94
99%
Alliant Reloder-26
<<locked>>
97%
55390
76%
**66
100%
Baschieri & Pellagri 107
<<locked>>
84%
64745
89%
**23
100%
Bofors RP15
<<locked>>
97%
47007
65%
**66
97%
Bofors RP3
<<locked>>
88%
64310
89%
**97
100%
[Bofors RP30]*
<<locked>>
97%
37884
52%
**05
93%
Bofors RP5
<<locked>>
97%
51155
71%
**35
98%
Bofors RP7
<<locked>>
93%
65064
90%
**20
100%
Hodgdon CFE223
<<locked>>
87%
64817
89%
**63
100%
[Hodgdon H1000]*
<<locked>>
97%
37942
52%
**43
92%
Hodgdon H380
<<locked>>
88%
64905
89%
**30
100%
Hodgdon H414 👍
<<locked>>
91%
64832
89%
**86
100%
Hodgdon H4350
<<locked>>
97%
62149
86%
**04
100%
Hodgdon H4831
<<locked>>
97%
48196
66%
**23
95%
Hodgdon H4831 SC
<<locked>>
97%
54389
75%
**25
97%
Hodgdon Hybrid 100V
<<locked>>
97%
61496
85%
**77
100%
Hodgdon LVR
<<locked>>
93%
65093
90%
**69
100%
[Hodgdon Retumbo]*
<<locked>>
97%
33243
46%
**80
93%
Hodgdon Superperformance 👍
<<locked>>
93%
63962
88%
**05
100%
Hodgdon VARGET
<<locked>>
90%
65180
90%
**07
100%
Hodgdon TrailBoss
<<locked>>
96%
34751
48%
**06
100%
IMR 3031
<<locked>>
86%
64658
89%
**61
100%
IMR 4064
<<locked>>
90%
64977
90%
**84
100%
IMR 4166 Enduron
<<locked>>
91%
65238
90%
**97
100%
IMR 4350
<<locked>>
97%
65180
90%
**43
100%
IMR 4451 Enduron
<<locked>>
92%
64382
89%
**13
100%
IMR 4831
<<locked>>
97%
58088
80%
**61
100%
IMR 4895
<<locked>>
86%
65050
90%
**36
100%
IMR 4955 Enduron
<<locked>>
97%
53476
74%
**76
97%
IMR 7828 SSC
<<locked>>
97%
52707
73%
**71
97%
IMR 8208 XBR
<<locked>>
83%
64672
89%
**67
100%
Lovex D073.6
<<locked>>
83%
64266
89%
**61
100%
Lovex S060
<<locked>>
85%
64484
89%
**51
100%
Lovex S062
<<locked>>
88%
64730
89%
**71
100%
Lovex S065
<<locked>>
94%
65137
90%
**13
100%
Lovex S070
<<locked>>
95%
65064
90%
**40
100%
Lovex S071
<<locked>>
97%
43004
59%
**18
98%
Norma 201
<<locked>>
85%
65006
90%
**64
100%
Norma 202
<<locked>>
85%
64934
90%
**48
100%
Norma 203B
<<locked>>
87%
64701
89%
**17
100%
Norma 204
<<locked>>
96%
64832
89%
**72
99%
Norma MRP
<<locked>>
97%
54476
75%
**23
99%
Norma URP
<<locked>>
96%
65195
90%
**72
100%
Ramshot Big Game
<<locked>>
87%
65195
90%
**40
100%
Ramshot Grand
<<locked>>
97%
57348
79%
**53
98%
Ramshot Hunter 👍
<<locked>>
96%
64455
89%
**89
100%
Ramshot Magnum
<<locked>>
97%
49298
68%
**95
98%
ReloadSwiss RS 14
<<locked>>
96%
35302
49%
**42
100%
ReloadSwiss RS 50
<<locked>>
88%
64484
89%
**13
100%
ReloadSwiss RS 52
<<locked>>
84%
64832
89%
**79
100%
ReloadSwiss RS 60
<<locked>>
89%
64136
88%
**95
100%
ReloadSwiss RS 62
<<locked>>
94%
64295
89%
**79
100%
ReloadSwiss RS 70 👍
<<locked>>
95%
65238
90%
**38
100%
ReloadSwiss RS 76
<<locked>>
97%
40988
57%
**13
97%
Rottweil R 902
<<locked>>
86%
64295
89%
**48
100%
Rottweil R 903
<<locked>>
91%
65267
90%
**04
100%
Rottweil R 904
<<locked>>
97%
59698
82%
**81
98%
Rottweil R 905
<<locked>>
97%
56420
78%
**74
99%
Rottweil R 907
<<locked>>
93%
65064
90%
**20
100%
SNPE Vectan SP 11
<<locked>>
89%
64919
90%
**40
100%
SNPE Vectan SP 7
<<locked>>
83%
65238
90%
**04
100%
SNPE Vectan SP 9
<<locked>>
85%
64643
89%
**97
100%
SNPE Vectan Tubal 3000
<<locked>>
85%
65006
90%
**79
100%
SNPE Vectan Tubal 5000
<<locked>>
90%
65253
90%
**69
100%
SNPE Vectan Tubal 7000
<<locked>>
94%
64701
89%
**71
100%
Shooters World Long Rifle
<<locked>>
94%
65137
90%
**13
100%
Shooters World Match Rifle
<<locked>>
83%
64266
89%
**61
100%
Shooters World Precision
<<locked>>
88%
64730
89%
**71
100%
Somchem S335
<<locked>>
85%
65166
90%
**82
100%
Somchem S341
<<locked>>
83%
64774
89%
**81
100%
Somchem S355
<<locked>>
90%
64629
89%
**97
100%
Somchem S361
<<locked>>
97%
61801
85%
**71
98%
Somchem S365
<<locked>>
97%
62497
86%
**40
100%
Somchem S385
<<locked>>
97%
57101
79%
**58
99%
Vihtavuori N133
<<locked>>
87%
65137
90%
**56
100%
Vihtavuori N135
<<locked>>
92%
64832
89%
**02
100%
Vihtavuori N140
<<locked>>
87%
65050
90%
**18
100%
Vihtavuori N150
<<locked>>
96%
64934
90%
**54
100%
Vihtavuori N160
<<locked>>
93%
65050
90%
**30
100%
Vihtavuori N165
<<locked>>
97%
47805
66%
**97
98%
Vihtavuori N540
<<locked>>
87%
65151
90%
**54
100%
Vihtavuori N550
<<locked>>
93%
64614
89%
**66
100%
Vihtavuori N555
<<locked>>
97%
54273
75%
**58
100%
Vihtavuori N560
<<locked>>
97%
51329
71%
**54
96%
[Vihtavuori N565]*
<<locked>>
97%
43033
59%
**90
94%
Winchester 6.5 StaBALL
<<locked>>
95%
65093
90%
**97
100%
Winchester 760 👍
<<locked>>
91%
64832
89%
**86
100%
Winchester StaBALL HD
<<locked>>
97%
42931
59%
**25
100%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
ADI APS 450
<<locked>>
81%
59625
82%
**65
100%
ADI AR 2206H
<<locked>>
81%
58465
81%
**25
100%
ADI AR 2208
<<locked>>
81%
49835
69%
**84
100%
[ADI AR 2209]*
<<locked>>
81%
34519
48%
**48
92%
[ADI AR 2213]*
<<locked>>
85%
35114
48%
**77
90%
[ADI AR 2217]*
<<locked>>
94%
34853
48%
**64
90%
[ADI AR 2225]*
<<locked>>
92%
29356
40%
**59
90%
Accurate 2200
<<locked>>
81%
60684
84%
**31
100%
Accurate 2700
<<locked>>
81%
48153
66%
**18
98%
[Accurate 3100]*
<<locked>>
81%
29979
41%
**23
94%
Accurate 4064
<<locked>>
81%
52910
73%
**07
100%
Accurate 4350
<<locked>>
81%
40756
56%
**85
99%
[Accurate MAGPRO]*
<<locked>>
90%
39392
54%
**08
90%
Alliant Reloder- TS 15.5
<<locked>>
81%
50473
70%
**07
100%
Alliant Reloder-15
<<locked>>
81%
53737
74%
**79
100%
Alliant Reloder-16
<<locked>>
81%
39537
55%
**98
99%
Alliant Reloder-17
<<locked>>
81%
44918
62%
**17
100%
[Alliant Reloder-19]*
<<locked>>
81%
34330
47%
**44
92%
[Alliant Reloder-22]*
<<locked>>
81%
30139
42%
**72
90%
Alliant Reloder-23
<<locked>>
81%
29037
40%
**56
97%
[Alliant Reloder-25]*
<<locked>>
81%
25483
35%
**38
90%
Alliant Reloder-26
<<locked>>
81%
31067
43%
**64
96%
Baschieri & Pellagri 107
<<locked>>
81%
58711
81%
**48
100%
[Bofors RP15]*
<<locked>>
84%
30806
42%
**92
90%
Bofors RP3
<<locked>>
81%
50749
70%
**20
100%
[Bofors RP30]*
<<locked>>
92%
32648
45%
**64
90%
[Bofors RP5]*
<<locked>>
81%
30139
42%
**72
90%
Bofors RP7
<<locked>>
81%
44643
62%
**95
97%
Hodgdon CFE223
<<locked>>
81%
53098
73%
**99
100%
[Hodgdon H1000]*
<<locked>>
94%
34853
48%
**64
90%
Hodgdon H380
<<locked>>
81%
51445
71%
**40
100%
Hodgdon H414
<<locked>>
81%
46369
64%
**03
98%
Hodgdon H4350
<<locked>>
81%
38029
52%
**84
95%
[Hodgdon H4831]*
<<locked>>
87%
35549
49%
**51
90%
[Hodgdon H4831 SC]*
<<locked>>
84%
35549
49%
**51
90%
Hodgdon Hybrid 100V
<<locked>>
81%
37130
51%
**90
100%
Hodgdon LVR
<<locked>>
81%
43569
60%
**38
99%
[Hodgdon Retumbo]*
<<locked>>
92%
29356
40%
**59
90%
Hodgdon Superperformance
<<locked>>
81%
41727
58%
**48
97%
Hodgdon VARGET
<<locked>>
81%
49385
68%
**77
100%
Hodgdon TrailBoss
<<locked>>
90%
31879
44%
**50
100%
IMR 3031
<<locked>>
81%
55579
77%
**49
100%
IMR 4064
<<locked>>
81%
48950
67%
**64
100%
IMR 4166 Enduron
<<locked>>
81%
48008
66%
**35
98%
IMR 4350
<<locked>>
81%
39885
55%
**26
96%
IMR 4451 Enduron
<<locked>>
81%
45963
63%
**28
98%
IMR 4831
<<locked>>
81%
35621
49%
**61
98%
IMR 4895
<<locked>>
81%
55201
76%
**02
100%
[IMR 4955 Enduron]*
<<locked>>
82%
34403
47%
**95
90%
[IMR 7828 SSC]*
<<locked>>
84%
34505
48%
**77
90%
IMR 8208 XBR
<<locked>>
81%
60727
84%
**18
100%
Lovex D073.6
<<locked>>
81%
58900
81%
**92
100%
Lovex S060
<<locked>>
81%
56913
78%
**43
100%
Lovex S062
<<locked>>
81%
52402
72%
**07
100%
Lovex S065
<<locked>>
81%
43424
60%
**75
99%
Lovex S070
<<locked>>
81%
41829
58%
**59
97%
[Lovex S071]*
<<locked>>
81%
25817
36%
**05
91%
Norma 201
<<locked>>
81%
57116
79%
**66
100%
Norma 202
<<locked>>
81%
57870
80%
**59
100%
Norma 203B
<<locked>>
81%
53229
73%
**66
100%
[Norma 204]*
<<locked>>
81%
39494
54%
**46
94%
[Norma MRP]*
<<locked>>
81%
31459
43%
**44
93%
Norma URP
<<locked>>
81%
40538
56%
**79
99%
Ramshot Big Game
<<locked>>
81%
53693
74%
**82
100%
[Ramshot Grand]*
<<locked>>
83%
34330
47%
**87
90%
Ramshot Hunter
<<locked>>
81%
39189
54%
**69
97%
[Ramshot Magnum]*
<<locked>>
83%
29762
41%
**49
90%
ReloadSwiss RS 14
<<locked>>
85%
30298
42%
**44
100%
ReloadSwiss RS 50
<<locked>>
81%
51271
71%
**20
99%
ReloadSwiss RS 52
<<locked>>
81%
58479
81%
**90
100%
ReloadSwiss RS 60
<<locked>>
81%
47834
66%
**69
100%
ReloadSwiss RS 62
<<locked>>
81%
40495
56%
**05
99%
ReloadSwiss RS 70
<<locked>>
81%
39044
54%
**08
98%
[ReloadSwiss RS 76]*
<<locked>>
87%
29472
41%
**92
90%
Rottweil R 902
<<locked>>
81%
54607
75%
**23
100%
Rottweil R 903
<<locked>>
81%
48153
66%
**71
100%
[Rottweil R 904]*
<<locked>>
81%
36056
50%
**41
92%
[Rottweil R 905]*
<<locked>>
81%
33533
46%
**31
92%
Rottweil R 907
<<locked>>
81%
44643
62%
**95
97%
SNPE Vectan SP 11
<<locked>>
81%
49269
68%
**20
100%
SNPE Vectan SP 7
<<locked>>
81%
60075
83%
**35
100%
SNPE Vectan SP 9
<<locked>>
81%
56768
78%
**92
100%
SNPE Vectan Tubal 3000
<<locked>>
81%
57899
80%
**00
100%
SNPE Vectan Tubal 5000
<<locked>>
81%
49023
68%
**69
100%
SNPE Vectan Tubal 7000
<<locked>>
81%
42743
59%
**26
97%
Shooters World Long Rifle
<<locked>>
81%
43424
60%
**75
99%
Shooters World Match Rifle
<<locked>>
81%
58900
81%
**92
100%
Shooters World Precision
<<locked>>
81%
52402
72%
**07
100%
Somchem S335
<<locked>>
81%
57392
79%
**90
100%
Somchem S341
<<locked>>
81%
59799
82%
**22
100%
Somchem S355
<<locked>>
81%
48080
66%
**64
100%
[Somchem S361]*
<<locked>>
81%
36274
50%
**25
91%
Somchem S365
<<locked>>
81%
36666
51%
**36
100%
[Somchem S385]*
<<locked>>
81%
33895
47%
**18
94%
Vihtavuori N133
<<locked>>
81%
54578
75%
**28
100%
Vihtavuori N135
<<locked>>
81%
46992
65%
**72
100%
Vihtavuori N140
<<locked>>
81%
54331
75%
**90
100%
Vihtavuori N150
<<locked>>
81%
41191
57%
**10
100%
Vihtavuori N160
<<locked>>
81%
43468
60%
**05
99%
[Vihtavuori N165]*
<<locked>>
81%
28587
39%
**67
90%
Vihtavuori N540
<<locked>>
81%
53751
74%
**07
100%
Vihtavuori N550
<<locked>>
81%
44266
61%
**54
99%
Vihtavuori N555
<<locked>>
81%
32242
44%
**31
97%
[Vihtavuori N560]*
<<locked>>
86%
35360
49%
**20
90%
[Vihtavuori N565]*
<<locked>>
89%
33779
47%
**84
90%
Winchester 6.5 StaBALL
<<locked>>
81%
41002
57%
**46
100%
Winchester 760
<<locked>>
81%
46369
64%
**03
98%
Winchester StaBALL HD
<<locked>>
81%
25570
35%
**26
96%

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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