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Load data for .300 RCM + .308 | 150gr | Hornady GMX

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Recommended Powder(s):

.300 RCM + .308 | 150gr | Hornady GMX

Load Specifications

Bullet:
.308 | 150gr | Hornady GMX
Manufacturer SKU:
30370
Bullet Weight:
150gr | 9.7g
Bullet Diameter:
0.308" | 7.82mm
Bullet Length:
1.350" | 34.3mm
Caliber:
.300 RCM
Case Length (l3):
2.090" | 53.1mm
Cartridge Length (C.O.L.):
2.797" | 71.1mm
Seated Depth:
0.643" | 16.3mm
Shank Seated Depth:
0.483" | 12.3mm
Case Capacity:
75.0 Grains of Water | 4.87 cm³
Primer Size:
Large Rifle (LR)
Max. allowed Pressure:
63817 psi | 4400 bar
LID:
LID_B2668_C371

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

Load data for 192 loads in caliber .300 RCM with .308 | 150gr | Hornady GMX bullet and 96 powder(s). 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".

    • A load must fulfill certain criteria to be listed in the default view below - see here.

    • Our load data might deviate from other sources - see the most common reasons here

    • All loads are based on the bullet and case dimensions shown under "Load Specifications" - see here what to do if you deviate.

    • You can set your specifications in the "Personalized Load Calculator".

    • Go to the bottom of the "My Account " page to set the measure system (imperial vs. metric) 

  • Muzzle velocity vs. barrel length

    Every 1 inch additional barrel length increases muzzle velocity by approx. 9.1 fps

  • .

    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 2206H
<<locked>>
91%
56333
88%
**86
99%
ADI AR 2208
<<locked>>
97%
56985
89%
**76
99%
Accurate 2015
<<locked>>
88%
57348
90%
**94
100%
Accurate 2200
<<locked>>
89%
56971
89%
**59
99%
Accurate 2230
<<locked>>
85%
56608
89%
**36
100%
Accurate 2460
<<locked>>
85%
56710
89%
**43
100%
Accurate 2495
<<locked>>
90%
57014
89%
**59
100%
Accurate 2520
<<locked>>
90%
56927
89%
**82
100%
Accurate 2700
<<locked>>
97%
56536
89%
**90
95%
Accurate 4064
<<locked>>
96%
57029
89%
**82
100%
Accurate 4350
<<locked>>
97%
43598
68%
**31
96%
Alliant AR-Comp
<<locked>>
90%
56782
89%
**43
100%
Alliant Reloder- TS 15.5
<<locked>>
97%
55985
88%
**86
100%
Alliant Reloder-10x
<<locked>>
85%
57159
90%
**00
100%
Alliant Reloder-15 👍
<<locked>>
95%
57319
90%
**22
99%
Alliant Reloder-16
<<locked>>
97%
43511
68%
**38
96%
Alliant Reloder-17
<<locked>>
97%
49559
78%
**92
99%
[Alliant Reloder-23]*
<<locked>>
97%
30792
48%
**36
93%
Baschieri & Pellagri 106
<<locked>>
84%
57058
89%
**48
100%
Baschieri & Pellagri 107
<<locked>>
91%
57145
90%
**15
99%
Hodgdon BL-C2 👍
<<locked>>
90%
57072
89%
**22
100%
Hodgdon Benchmark
<<locked>>
89%
57276
90%
**23
100%
Hodgdon CFE223
<<locked>>
95%
57319
90%
**51
99%
Hodgdon H322
<<locked>>
88%
57276
90%
**59
100%
Hodgdon H380
<<locked>>
96%
57261
90%
**02
98%
Hodgdon H414
<<locked>>
97%
51459
81%
**69
95%
Hodgdon Hybrid 100V
<<locked>>
97%
39784
62%
**23
97%
Hodgdon LVR
<<locked>>
97%
47877
75%
**97
97%
[Hodgdon Superperformance]*
<<locked>>
97%
47906
75%
**07
93%
Hodgdon VARGET
<<locked>>
97%
56507
89%
**63
99%
Hodgdon TrailBoss
<<locked>>
97%
33359
52%
**65
100%
IMR 3031
<<locked>>
94%
57087
89%
**95
100%
IMR 4064
<<locked>>
97%
55114
86%
**36
99%
IMR 4166 Enduron
<<locked>>
97%
55622
87%
**10
96%
IMR 4198
<<locked>>
85%
56739
89%
**54
100%
[IMR 4350]*
<<locked>>
97%
44266
69%
**56
92%
IMR 4451 Enduron
<<locked>>
97%
52794
83%
**94
95%
IMR 4831
<<locked>>
97%
37478
59%
**84
95%
IMR 4895 👍
<<locked>>
94%
56797
89%
**25
100%
IMR 8208 XBR
<<locked>>
90%
57276
90%
**69
100%
Lovex D073.4
<<locked>>
84%
56579
89%
**33
100%
Lovex D073.5
<<locked>>
86%
57029
89%
**46
100%
Lovex D073.6
<<locked>>
91%
56391
88%
**76
100%
Lovex S060
<<locked>>
91%
57159
90%
**20
100%
Lovex S062
<<locked>>
95%
56855
89%
**66
100%
Lovex S065
<<locked>>
97%
48805
76%
**41
96%
[Lovex S070]*
<<locked>>
97%
45803
72%
**02
94%
Norma 201
<<locked>>
92%
56898
89%
**59
100%
Norma 202
<<locked>>
92%
56797
89%
**59
100%
Norma 203B
<<locked>>
95%
57232
90%
**18
100%
Norma URP
<<locked>>
97%
43308
68%
**15
96%
Ramshot Big Game 👍
<<locked>>
95%
57232
90%
**41
100%
[Ramshot Hunter]*
<<locked>>
97%
43120
68%
**15
94%
Ramshot TAC
<<locked>>
89%
56927
89%
**66
98%
Ramshot Wild Boar
<<locked>>
90%
57116
90%
**99
100%
Ramshot X-Terminator
<<locked>>
87%
57000
89%
**49
99%
ReloadSwiss RS 14
<<locked>>
96%
33504
53%
**01
100%
ReloadSwiss RS 40
<<locked>>
86%
57406
90%
**59
100%
ReloadSwiss RS 50
<<locked>>
95%
56550
89%
**63
97%
ReloadSwiss RS 52 👍
<<locked>>
95%
56666
89%
**41
100%
ReloadSwiss RS 60
<<locked>>
97%
48414
76%
**86
100%
ReloadSwiss RS 62
<<locked>>
97%
43221
68%
**48
96%
ReloadSwiss RS 70
<<locked>>
97%
44353
69%
**64
95%
Rottweil R 901
<<locked>>
89%
56869
89%
**36
100%
Rottweil R 902
<<locked>>
94%
56608
89%
**43
100%
Rottweil R 903
<<locked>>
97%
52605
82%
**40
100%
[Rottweil R 907]*
<<locked>>
97%
50879
80%
**61
94%
SNPE Vectan SP 11
<<locked>>
97%
54955
86%
**12
99%
SNPE Vectan SP 7
<<locked>>
90%
57246
90%
**69
98%
SNPE Vectan SP 9
<<locked>>
92%
56913
89%
**86
100%
SNPE Vectan Tubal 3000
<<locked>>
91%
56637
89%
**71
100%
SNPE Vectan Tubal 5000
<<locked>>
97%
56724
89%
**67
100%
SNPE Vectan Tubal 7000
<<locked>>
97%
48747
76%
**85
95%
Shooters World Long Rifle
<<locked>>
97%
48805
76%
**41
96%
Shooters World Match Rifle
<<locked>>
91%
56391
88%
**76
100%
Shooters World Precision
<<locked>>
95%
56855
89%
**66
100%
Shooters World Tactical Rifle
<<locked>>
84%
56956
89%
**20
100%
Somchem S321
<<locked>>
87%
57232
90%
**86
100%
Somchem S335
<<locked>>
91%
56985
89%
**87
100%
Somchem S341
<<locked>>
91%
57421
90%
**76
100%
Somchem S355
<<locked>>
97%
53911
84%
**46
100%
Somchem S365
<<locked>>
97%
38493
60%
**66
98%
Vihtavuori N130
<<locked>>
88%
57058
89%
**54
100%
Vihtavuori N133
<<locked>>
93%
56376
88%
**61
100%
Vihtavuori N135
<<locked>>
97%
51503
81%
**54
100%
Vihtavuori N140
<<locked>>
94%
56608
89%
**23
100%
Vihtavuori N150
<<locked>>
97%
45455
71%
**76
99%
Vihtavuori N160
<<locked>>
97%
48211
76%
**67
97%
Vihtavuori N530
<<locked>>
88%
57116
90%
**76
100%
Vihtavuori N540
<<locked>>
94%
57174
90%
**69
100%
Vihtavuori N550
<<locked>>
97%
47979
75%
**04
97%
[Vihtavuori N555]*
<<locked>>
97%
32358
51%
**18
93%
Winchester 6.5 StaBALL
<<locked>>
97%
46833
73%
**12
99%
Winchester 748
<<locked>>
87%
56507
89%
**05
100%
Winchester 760
<<locked>>
97%
51459
81%
**69
95%
Winchester StaBALL Match
<<locked>>
85%
57116
90%
**05
100%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
ADI AR 2206H
<<locked>>
81%
41220
65%
**10
97%
[ADI AR 2208]*
<<locked>>
81%
35027
55%
**52
94%
Accurate 2015
<<locked>>
81%
46746
73%
**43
100%
Accurate 2200
<<locked>>
81%
43395
68%
**20
96%
Accurate 2230
<<locked>>
81%
49356
77%
**22
99%
Accurate 2460
<<locked>>
81%
49458
78%
**35
100%
Accurate 2495
<<locked>>
81%
41887
66%
**26
100%
Accurate 2520
<<locked>>
81%
42496
67%
**49
100%
[Accurate 2700]*
<<locked>>
86%
39784
62%
**95
90%
Accurate 4064
<<locked>>
81%
35230
55%
**02
99%
[Accurate 4350]*
<<locked>>
85%
29095
46%
**87
90%
Alliant AR-Comp
<<locked>>
81%
42554
67%
**33
100%
Alliant Reloder- TS 15.5
<<locked>>
81%
34229
54%
**79
96%
Alliant Reloder-10x
<<locked>>
81%
50575
79%
**08
100%
Alliant Reloder-15
<<locked>>
81%
36883
58%
**35
95%
[Alliant Reloder-16]*
<<locked>>
85%
30313
47%
**90
90%
[Alliant Reloder-17]*
<<locked>>
81%
29646
46%
**07
92%
[Alliant Reloder-23]*
<<locked>>
92%
27267
43%
**28
90%
Baschieri & Pellagri 106
<<locked>>
81%
52866
83%
**89
100%
Baschieri & Pellagri 107
<<locked>>
81%
40422
63%
**13
96%
Hodgdon BL-C2
<<locked>>
81%
42090
66%
**62
98%
Hodgdon Benchmark
<<locked>>
81%
45455
71%
**30
99%
[Hodgdon CFE223]*
<<locked>>
81%
35317
55%
**28
93%
Hodgdon H322
<<locked>>
81%
45745
72%
**79
100%
[Hodgdon H380]*
<<locked>>
81%
34708
54%
**72
93%
[Hodgdon H414]*
<<locked>>
87%
36608
57%
**57
90%
[Hodgdon Hybrid 100V]*
<<locked>>
83%
26078
41%
**46
90%
[Hodgdon LVR]*
<<locked>>
84%
31328
49%
**16
90%
[Hodgdon Superperformance]*
<<locked>>
92%
40567
64%
**46
90%
[Hodgdon VARGET]*
<<locked>>
81%
34679
54%
**43
94%
Hodgdon TrailBoss
<<locked>>
84%
27673
43%
**44
100%
IMR 3031
<<locked>>
81%
37159
58%
**57
100%
[IMR 4064]*
<<locked>>
81%
34243
54%
**26
94%
[IMR 4166 Enduron]*
<<locked>>
83%
36390
57%
**33
90%
IMR 4198
<<locked>>
81%
51227
80%
**76
100%
[IMR 4350]*
<<locked>>
92%
39044
61%
**44
90%
[IMR 4451 Enduron]*
<<locked>>
85%
37260
58%
**89
90%
[IMR 4831]*
<<locked>>
89%
28935
45%
**57
90%
IMR 4895
<<locked>>
81%
37811
59%
**67
96%
IMR 8208 XBR
<<locked>>
81%
43308
68%
**33
99%
Lovex D073.4
<<locked>>
81%
50952
80%
**44
100%
Lovex D073.5
<<locked>>
81%
48950
77%
**25
100%
Lovex D073.6
<<locked>>
81%
40045
63%
**97
99%
Lovex S060
<<locked>>
81%
41814
66%
**54
97%
Lovex S062
<<locked>>
81%
36550
57%
**95
97%
[Lovex S065]*
<<locked>>
83%
32213
50%
**77
90%
[Lovex S070]*
<<locked>>
88%
35621
56%
**75
90%
Norma 201
<<locked>>
81%
40466
63%
**74
98%
Norma 202
<<locked>>
81%
40422
63%
**80
100%
Norma 203B
<<locked>>
81%
36129
57%
**21
96%
[Norma URP]*
<<locked>>
85%
29820
47%
**87
90%
Ramshot Big Game
<<locked>>
81%
35723
56%
**31
95%
[Ramshot Hunter]*
<<locked>>
90%
34896
55%
**18
90%
Ramshot TAC
<<locked>>
81%
43163
68%
**17
95%
Ramshot Wild Boar
<<locked>>
81%
42424
66%
**43
97%
Ramshot X-Terminator
<<locked>>
81%
47021
74%
**82
98%
ReloadSwiss RS 14
<<locked>>
81%
26571
42%
**50
100%
ReloadSwiss RS 40
<<locked>>
81%
48530
76%
**18
100%
[ReloadSwiss RS 50]*
<<locked>>
81%
35476
56%
**59
91%
ReloadSwiss RS 52
<<locked>>
81%
34751
54%
**31
97%
[ReloadSwiss RS 60]*
<<locked>>
81%
28935
45%
**87
93%
[ReloadSwiss RS 62]*
<<locked>>
86%
30298
47%
**23
90%
[ReloadSwiss RS 70]*
<<locked>>
89%
34040
53%
**08
90%
Rottweil R 901
<<locked>>
81%
44324
69%
**23
100%
Rottweil R 902
<<locked>>
81%
38464
60%
**21
98%
Rottweil R 903
<<locked>>
81%
31647
50%
**13
95%
[Rottweil R 907]*
<<locked>>
88%
38914
61%
**25
90%
[SNPE Vectan SP 11]*
<<locked>>
81%
32735
51%
**56
94%
SNPE Vectan SP 7
<<locked>>
81%
41394
65%
**90
95%
SNPE Vectan SP 9
<<locked>>
81%
39595
62%
**77
97%
SNPE Vectan Tubal 3000
<<locked>>
81%
42177
66%
**38
100%
SNPE Vectan Tubal 5000
<<locked>>
81%
34853
55%
**97
99%
[SNPE Vectan Tubal 7000]*
<<locked>>
87%
35505
56%
**23
90%
[Shooters World Long Rifle]*
<<locked>>
83%
32213
50%
**77
90%
Shooters World Match Rifle
<<locked>>
81%
40045
63%
**97
99%
Shooters World Precision
<<locked>>
81%
36550
57%
**95
97%
Shooters World Tactical Rifle
<<locked>>
81%
51416
81%
**38
99%
Somchem S321
<<locked>>
81%
46775
73%
**12
99%
Somchem S335
<<locked>>
81%
41785
65%
**41
100%
Somchem S341
<<locked>>
81%
41133
64%
**94
97%
Somchem S355
<<locked>>
81%
32938
52%
**30
95%
[Somchem S365]*
<<locked>>
81%
23830
37%
**23
90%
Vihtavuori N130
<<locked>>
81%
46485
73%
**00
100%
Vihtavuori N133
<<locked>>
81%
39276
62%
**85
100%
Vihtavuori N135
<<locked>>
81%
31807
50%
**84
99%
Vihtavuori N140
<<locked>>
81%
37681
59%
**08
99%
[Vihtavuori N150]*
<<locked>>
81%
27847
44%
**79
94%
[Vihtavuori N160]*
<<locked>>
82%
29849
47%
**48
90%
Vihtavuori N530
<<locked>>
81%
45571
71%
**85
99%
Vihtavuori N540
<<locked>>
81%
37507
59%
**28
99%
[Vihtavuori N550]*
<<locked>>
82%
29443
46%
**77
90%
[Vihtavuori N555]*
<<locked>>
92%
27789
44%
**80
90%
[Winchester 6.5 StaBALL]*
<<locked>>
81%
28021
44%
**69
92%
Winchester 748
<<locked>>
81%
46079
72%
**35
100%
[Winchester 760]*
<<locked>>
87%
36608
57%
**57
90%
Winchester StaBALL Match
<<locked>>
81%
49023
77%
**71
99%

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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