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Load data for .270 Weath. Mag. + .277 | 150gr | Sierra RN Prohunter

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Recommended Powder(s): ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22, Norma MRP, Ramshot Magnum

.270 Weath. Mag. + .277 | 150gr | Sierra RN Prohunter

Load Specifications

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 Weath. Mag. load data
Case Length (l3):
2.549" | 64.7mm
Cartridge Length (C.O.L.):
3.246" | 82.4mm
Seated Depth:
0.403" | 10.2mm
Shank Seated Depth:
0.403" | 10.2mm
Case Capacity:
82.0 Grains of Water | 5.32 cm³
Primer Size:
Large Rifle Magnum (LRM)
Max. allowed Pressure:
63817 psi | 4400 bar
LID:
LID_B5833_C270
Last updated:
2025-02-02

>> Use the Personalized Load Calculator further below to adjust input parameters. 

Load data for 124 loads in caliber .270 Weath. Mag. with .277 | 150gr | Sierra RN Prohunter bullet and 62 powders such as ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22, Norma MRP, Ramshot Magnum. 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".

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    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.

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 AR 2209 👍
<<locked>>
91%
57058
89%
**63
99%
ADI AR 2213
<<locked>>
94%
56565
89%
**89
99%
ADI AR 2217
<<locked>>
97%
45078
71%
**69
97%
ADI AR 2225
<<locked>>
97%
40669
64%
**46
99%
Accurate 3100
<<locked>>
94%
57000
89%
**97
100%
Accurate 4350
<<locked>>
85%
56637
89%
**04
100%
Accurate MAGPRO
<<locked>>
95%
57232
90%
**12
97%
Alliant Reloder-16
<<locked>>
87%
56840
89%
**56
100%
Alliant Reloder-19 👍
<<locked>>
92%
57377
90%
**56
100%
Alliant Reloder-22 👍
<<locked>>
94%
56478
88%
**86
100%
Alliant Reloder-23
<<locked>>
95%
56521
89%
**40
100%
Alliant Reloder-25
<<locked>>
97%
51401
81%
**27
100%
Alliant Reloder-26
<<locked>>
91%
56913
89%
**25
100%
Hodgdon H1000
<<locked>>
97%
45078
71%
**69
97%
Hodgdon H4350
<<locked>>
89%
57116
89%
**94
100%
Hodgdon H4831
<<locked>>
97%
57421
90%
**40
98%
Hodgdon H4831 SC
<<locked>>
93%
57421
90%
**40
98%
Hodgdon Hybrid 100V
<<locked>>
89%
56565
89%
**64
100%
Hodgdon LVR
<<locked>>
85%
57217
90%
**27
100%
Hodgdon Retumbo
<<locked>>
97%
40669
64%
**46
99%
Hodgdon Superperformance
<<locked>>
85%
57421
90%
**82
100%
Hodgdon TrailBoss
<<locked>>
97%
35752
56%
**95
100%
IMR 4350
<<locked>>
88%
57305
90%
**00
100%
IMR 4451 Enduron
<<locked>>
84%
57363
90%
**84
100%
IMR 4831
<<locked>>
91%
57261
90%
**04
100%
IMR 4955 Enduron
<<locked>>
94%
57377
90%
**10
98%
IMR 7828 SSC
<<locked>>
93%
57392
90%
**12
99%
[IMR 8133 Enduron]*
<<locked>>
97%
36608
57%
**44
94%
Lovex S065
<<locked>>
85%
56753
89%
**64
100%
Lovex S070
<<locked>>
86%
57188
90%
**90
100%
Lovex S071
<<locked>>
97%
52054
82%
**28
100%
Norma 204
<<locked>>
87%
57319
90%
**36
99%
Norma 217
<<locked>>
97%
36289
57%
**57
96%
Norma MRP 👍
<<locked>>
92%
57145
90%
**15
100%
Norma URP
<<locked>>
86%
56652
89%
**07
100%
Ramshot Hunter
<<locked>>
87%
56782
89%
**40
100%
Ramshot Magnum 👍
<<locked>>
95%
57058
89%
**79
100%
ReloadSwiss RS 14
<<locked>>
96%
36289
57%
**34
100%
ReloadSwiss RS 60
<<locked>>
84%
57246
90%
**76
100%
ReloadSwiss RS 62
<<locked>>
86%
57319
90%
**40
100%
ReloadSwiss RS 70
<<locked>>
86%
56942
89%
**86
100%
ReloadSwiss RS 76
<<locked>>
97%
50734
79%
**86
100%
ReloadSwiss RS 80
<<locked>>
97%
45672
72%
**54
96%
Rottweil R 904
<<locked>>
90%
56927
89%
**07
99%
Rottweil R 905
<<locked>>
92%
56898
89%
**49
100%
Rottweil R 907
<<locked>>
85%
57406
90%
**84
100%
SNPE Vectan Tubal 7000
<<locked>>
85%
56797
89%
**31
100%
Shooters World Long Rifle
<<locked>>
85%
56753
89%
**64
100%
Somchem S361
<<locked>>
90%
57188
90%
**77
98%
Somchem S365
<<locked>>
88%
56797
89%
**07
100%
Somchem S385
<<locked>>
91%
57217
90%
**17
100%
Vihtavuori N150
<<locked>>
87%
56739
89%
**12
100%
Vihtavuori N160
<<locked>>
84%
56855
89%
**74
100%
Vihtavuori N165
<<locked>>
97%
57014
89%
**04
100%
Vihtavuori N550
<<locked>>
84%
57232
90%
**20
100%
Vihtavuori N555
<<locked>>
92%
56826
89%
**36
100%
Vihtavuori N560
<<locked>>
94%
56724
89%
**09
98%
Vihtavuori N565
<<locked>>
97%
53824
84%
**43
98%
Vihtavuori N568
<<locked>>
97%
47268
74%
**74
95%
[Vihtavuori N570]*
<<locked>>
97%
44933
70%
**48
92%
Winchester 6.5 StaBALL
<<locked>>
86%
57363
90%
**54
100%
Winchester StaBALL HD
<<locked>>
96%
56550
89%
**51
100%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
ADI AR 2209
<<locked>>
81%
40596
64%
**57
96%
[ADI AR 2213]*
<<locked>>
81%
36274
57%
**75
93%
[ADI AR 2217]*
<<locked>>
85%
31241
49%
**34
90%
[ADI AR 2225]*
<<locked>>
84%
26629
42%
**33
90%
Accurate 3100
<<locked>>
81%
36492
57%
**30
98%
Accurate 4350
<<locked>>
81%
48849
77%
**82
100%
[Accurate MAGPRO]*
<<locked>>
81%
35259
55%
**62
90%
Alliant Reloder-16
<<locked>>
81%
46905
73%
**92
100%
Alliant Reloder-19
<<locked>>
81%
40669
64%
**48
96%
Alliant Reloder-22
<<locked>>
81%
36405
57%
**92
95%
Alliant Reloder-23
<<locked>>
81%
35041
55%
**52
100%
Alliant Reloder-25
<<locked>>
81%
30342
48%
**61
96%
Alliant Reloder-26
<<locked>>
81%
38667
61%
**00
99%
[Hodgdon H1000]*
<<locked>>
85%
31241
49%
**34
90%
Hodgdon H4350
<<locked>>
81%
44266
69%
**71
98%
[Hodgdon H4831]*
<<locked>>
81%
34185
54%
**80
91%
[Hodgdon H4831 SC]*
<<locked>>
81%
38029
60%
**72
93%
Hodgdon Hybrid 100V
<<locked>>
81%
43990
69%
**71
100%
Hodgdon LVR
<<locked>>
81%
51097
80%
**28
100%
[Hodgdon Retumbo]*
<<locked>>
84%
26629
42%
**33
90%
Hodgdon Superperformance
<<locked>>
81%
50299
79%
**61
99%
Hodgdon TrailBoss
<<locked>>
81%
28442
45%
**44
100%
IMR 4350
<<locked>>
81%
46470
73%
**17
99%
IMR 4451 Enduron
<<locked>>
81%
52750
83%
**18
100%
IMR 4831
<<locked>>
81%
42308
66%
**51
100%
[IMR 4955 Enduron]*
<<locked>>
81%
38145
60%
**46
94%
[IMR 7828 SSC]*
<<locked>>
81%
37043
58%
**15
94%
[IMR 8133 Enduron]*
<<locked>>
91%
30560
48%
**67
90%
Lovex S065
<<locked>>
81%
50125
79%
**59
100%
Lovex S070
<<locked>>
81%
48428
76%
**56
99%
Lovex S071
<<locked>>
81%
31299
49%
**95
96%
Norma 204
<<locked>>
81%
46717
73%
**53
98%
[Norma 217]*
<<locked>>
87%
26658
42%
**72
90%
Norma MRP
<<locked>>
81%
38072
60%
**57
97%
Norma URP
<<locked>>
81%
47718
75%
**66
100%
Ramshot Hunter
<<locked>>
81%
46644
73%
**66
100%
Ramshot Magnum
<<locked>>
81%
33605
53%
**20
95%
ReloadSwiss RS 14
<<locked>>
81%
29008
45%
**80
100%
ReloadSwiss RS 60
<<locked>>
81%
52170
82%
**04
100%
ReloadSwiss RS 62
<<locked>>
81%
48878
77%
**12
100%
ReloadSwiss RS 70
<<locked>>
81%
46963
74%
**25
100%
[ReloadSwiss RS 76]*
<<locked>>
81%
28601
45%
**25
92%
[ReloadSwiss RS 80]*
<<locked>>
89%
33808
53%
**72
90%
Rottweil R 904
<<locked>>
81%
41989
66%
**38
96%
Rottweil R 905
<<locked>>
81%
39900
63%
**38
96%
Rottweil R 907
<<locked>>
81%
51271
80%
**82
99%
SNPE Vectan Tubal 7000
<<locked>>
81%
49124
77%
**10
99%
Shooters World Long Rifle
<<locked>>
81%
50125
79%
**59
100%
Somchem S361
<<locked>>
81%
42743
67%
**21
95%
Somchem S365
<<locked>>
81%
44715
70%
**26
100%
Somchem S385
<<locked>>
81%
40582
64%
**18
97%
Vihtavuori N150
<<locked>>
81%
47718
75%
**74
100%
Vihtavuori N160
<<locked>>
81%
51445
81%
**95
100%
Vihtavuori N165
<<locked>>
81%
34113
53%
**67
95%
Vihtavuori N550
<<locked>>
81%
51822
81%
**38
100%
Vihtavuori N555
<<locked>>
81%
39392
62%
**31
100%
[Vihtavuori N560]*
<<locked>>
81%
36361
57%
**98
93%
[Vihtavuori N565]*
<<locked>>
81%
31270
49%
**57
90%
[Vihtavuori N568]*
<<locked>>
89%
35259
55%
**98
90%
[Vihtavuori N570]*
<<locked>>
94%
40669
64%
**53
90%
Winchester 6.5 StaBALL
<<locked>>
81%
48356
76%
**23
100%
Winchester StaBALL HD
<<locked>>
81%
30821
48%
**72
100%

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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