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

Recommended Powder(s): Alliant Reloder-15, Hodgdon BL-C2, IMR 4895, Ramshot Big Game, ReloadSwiss RS 52

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.308 \| 150gr \| Hornady GMX
Manufacturer SKU:	30370
Bullet Weight:	150gr \| 9.7g
Bullet Diameter:	0.308" \| 7.82mm
Bullet Length:	1.420" \| 36.1mm
Caliber:	.300 RCM load data
Case Length (l3):	2.090" \| 53.1mm
Cartridge Length (C.O.L.):	2.797" \| 71.1mm
Seated Depth:	0.713" \| 18.1mm
Shank Seated Depth:	0.553" \| 14.0mm
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
Last updated:	2025-02-02
Recommended Twist Rate:	1:11 - 1:9

Load data for 198 loads in caliber .300 RCM with .308 | 150gr | Hornady GMX bullet and 99 powders such as Alliant Reloder-15, Hodgdon BL-C2, IMR 4895, Ramshot Big Game, ReloadSwiss RS 52. 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 "powder criteria to fulfill to be listed".

Our load data might deviate from other sources - see the "most common reasons for deviations".

All loads are based on the bullet and case dimensions shown under "Load Specifications" - see "reloading suggestions" if you deviate.

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

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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 2206H	<<locked>>	92%	56768	89%	**86	99%
ADI AR 2208	<<locked>>	97%	55622	87%	**43	99%
ADI AR 2219	<<locked>>	83%	56956	89%	**43	100%
Accurate 2015	<<locked>>	88%	56666	89%	**74	100%
Accurate 2200	<<locked>>	90%	56956	89%	**43	98%
Accurate 2230	<<locked>>	86%	56449	88%	**23	100%
Accurate 2460	<<locked>>	86%	57406	90%	**40	100%
Accurate 2495	<<locked>>	91%	57334	90%	**63	100%
Accurate 2520	<<locked>>	90%	56797	89%	**69	100%
Accurate 2700	<<locked>>	97%	54853	86%	**54	95%
Accurate 4064	<<locked>>	97%	56956	89%	**76	100%
Accurate 4350	<<locked>>	97%	42076	66%	**99	96%
Alliant AR-Comp	<<locked>>	90%	56942	89%	**33	100%
Alliant Reloder- TS 15.5	<<locked>>	97%	55550	87%	**72	100%
Alliant Reloder-10x	<<locked>>	86%	57188	90%	**94	100%
Alliant Reloder-15 👍	<<locked>>	95%	56666	89%	**05	99%
Alliant Reloder-16	<<locked>>	97%	42250	66%	**05	96%
Alliant Reloder-17	<<locked>>	97%	48370	76%	**59	99%
[Alliant Reloder-23]*	<<locked>>	97%	30284	47%	**13	92%
Baschieri & Pellagri 106	<<locked>>	84%	57043	89%	**44	100%
Baschieri & Pellagri 107 👍	<<locked>>	92%	57348	90%	**09	99%
Hodgdon BL-C2 👍	<<locked>>	90%	57058	89%	**12	100%
Hodgdon Benchmark	<<locked>>	89%	57101	89%	**07	100%
Hodgdon CFE223	<<locked>>	95%	56521	89%	**28	99%
Hodgdon H322	<<locked>>	88%	56637	89%	**40	100%
Hodgdon H335	<<locked>>	83%	57029	89%	**56	100%
Hodgdon H380	<<locked>>	97%	57319	90%	**92	98%
Hodgdon H414	<<locked>>	97%	50473	79%	**40	95%
Hodgdon Hybrid 100V	<<locked>>	97%	38827	61%	**87	97%
Hodgdon LVR	<<locked>>	97%	46514	73%	**58	96%
[Hodgdon Superperformance]*	<<locked>>	97%	46833	73%	**67	93%
Hodgdon VARGET	<<locked>>	97%	54969	86%	**36	99%
Hodgdon TrailBoss	<<locked>>	97%	33373	52%	**59	100%
IMR 3031	<<locked>>	95%	57348	90%	**95	100%
IMR 4064	<<locked>>	97%	54781	86%	**20	99%
IMR 4166 Enduron	<<locked>>	97%	54520	85%	**77	96%
IMR 4198	<<locked>>	85%	56739	89%	**44	100%
[IMR 4350]*	<<locked>>	97%	43613	68%	**36	92%
IMR 4451 Enduron	<<locked>>	97%	52054	82%	**74	95%
[IMR 4831]*	<<locked>>	97%	36303	57%	**51	94%
IMR 4895 👍	<<locked>>	95%	56884	89%	**22	100%
IMR 8208 XBR	<<locked>>	90%	56884	89%	**53	100%
Lovex D073.4	<<locked>>	85%	57203	90%	**27	100%
Lovex D073.5	<<locked>>	86%	56855	89%	**33	100%
Lovex D073.6	<<locked>>	92%	56217	88%	**66	100%
Lovex S060	<<locked>>	92%	56420	88%	**07	99%
Lovex S062	<<locked>>	96%	56971	89%	**63	100%
Lovex S065	<<locked>>	97%	48051	75%	**12	96%
[Lovex S070]*	<<locked>>	97%	45513	71%	**79	94%
Norma 201	<<locked>>	92%	56666	89%	**46	100%
Norma 202	<<locked>>	93%	57029	89%	**49	100%
Norma 203B	<<locked>>	96%	56608	89%	**02	99%
Norma URP	<<locked>>	97%	42786	67%	**99	96%
Ramshot Big Game	<<locked>>	96%	57290	90%	**31	99%
[Ramshot Hunter]*	<<locked>>	97%	42047	66%	**79	93%
Ramshot TAC	<<locked>>	90%	56942	89%	**53	98%
Ramshot Wild Boar	<<locked>>	90%	57232	90%	**89	99%
Ramshot X-Terminator	<<locked>>	88%	56869	89%	**33	99%
ReloadSwiss RS 14	<<locked>>	97%	33605	53%	**98	100%
ReloadSwiss RS 40	<<locked>>	86%	56927	89%	**43	100%
ReloadSwiss RS 50	<<locked>>	96%	56652	89%	**53	97%
ReloadSwiss RS 52 👍	<<locked>>	96%	57145	90%	**38	100%
ReloadSwiss RS 60	<<locked>>	97%	47268	74%	**53	99%
ReloadSwiss RS 62	<<locked>>	97%	42293	66%	**18	95%
[ReloadSwiss RS 70]*	<<locked>>	97%	43192	68%	**18	94%
Rottweil R 901	<<locked>>	90%	57232	90%	**27	100%
Rottweil R 902	<<locked>>	94%	56710	89%	**40	100%
Rottweil R 903	<<locked>>	97%	51996	81%	**23	99%
[Rottweil R 907]*	<<locked>>	97%	49951	78%	**28	94%
SNPE Vectan SP 10	<<locked>>	83%	57014	89%	**53	100%
SNPE Vectan SP 11	<<locked>>	97%	53534	84%	**82	99%
SNPE Vectan SP 7	<<locked>>	91%	57276	90%	**59	98%
SNPE Vectan SP 9	<<locked>>	93%	56536	89%	**72	99%
SNPE Vectan Tubal 3000	<<locked>>	91%	57072	89%	**67	100%
SNPE Vectan Tubal 5000	<<locked>>	97%	55085	86%	**41	100%
[SNPE Vectan Tubal 7000]*	<<locked>>	97%	47732	75%	**59	94%
Shooters World Long Rifle	<<locked>>	97%	48051	75%	**12	96%
Shooters World Match Rifle	<<locked>>	92%	56217	88%	**66	100%
Shooters World Precision	<<locked>>	96%	56971	89%	**63	100%
Shooters World Tactical Rifle	<<locked>>	84%	56869	89%	**13	100%
Somchem S321	<<locked>>	88%	57087	89%	**72	100%
Somchem S335	<<locked>>	92%	56927	89%	**77	100%
Somchem S341	<<locked>>	92%	57421	90%	**66	99%
Somchem S355	<<locked>>	97%	52605	82%	**23	99%
Somchem S365	<<locked>>	97%	37840	59%	**36	98%
Vihtavuori N130	<<locked>>	88%	57203	90%	**48	100%
Vihtavuori N133	<<locked>>	94%	56550	89%	**58	100%
Vihtavuori N135	<<locked>>	97%	49980	78%	**25	100%
Vihtavuori N140	<<locked>>	95%	57087	89%	**27	100%
Vihtavuori N150	<<locked>>	96%	44063	69%	**46	99%
Vihtavuori N160	<<locked>>	97%	47137	74%	**35	97%
Vihtavuori N530	<<locked>>	89%	57290	90%	**69	100%
Vihtavuori N540	<<locked>>	95%	57116	89%	**59	100%
Vihtavuori N550	<<locked>>	97%	47268	74%	**87	97%
[Vihtavuori N555]*	<<locked>>	97%	31778	50%	**92	92%
Winchester 6.5 StaBALL	<<locked>>	97%	45701	72%	**85	98%
Winchester 748	<<locked>>	88%	57276	90%	**09	100%
Winchester 760	<<locked>>	97%	50473	79%	**40	95%
Winchester StaBALL Match	<<locked>>	86%	56579	89%	**82	100%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AR 2206H	<<locked>>	81%	40451	63%	**87	97%
[ADI AR 2208]*	<<locked>>	81%	34418	54%	**30	94%
ADI AR 2219	<<locked>>	81%	53127	83%	**90	100%
Accurate 2015	<<locked>>	81%	45890	72%	**17	100%
Accurate 2200	<<locked>>	81%	42424	66%	**87	96%
Accurate 2230	<<locked>>	81%	48428	76%	**95	99%
Accurate 2460	<<locked>>	81%	48312	76%	**05	100%
Accurate 2495	<<locked>>	81%	40654	64%	**97	100%
Accurate 2520	<<locked>>	81%	41307	65%	**17	99%
[Accurate 2700]*	<<locked>>	87%	40234	63%	**92	90%
Accurate 4064	<<locked>>	81%	34214	54%	**72	99%
[Accurate 4350]*	<<locked>>	86%	28877	45%	**80	90%
Alliant AR-Comp	<<locked>>	81%	41640	65%	**13	100%
Alliant Reloder- TS 15.5	<<locked>>	81%	33431	52%	**52	96%
Alliant Reloder-10x	<<locked>>	81%	49632	78%	**89	100%
Alliant Reloder-15	<<locked>>	81%	36143	57%	**12	95%
[Alliant Reloder-16]*	<<locked>>	86%	30661	48%	**93	90%
[Alliant Reloder-17]*	<<locked>>	81%	29066	46%	**80	92%
[Alliant Reloder-23]*	<<locked>>	94%	27876	44%	**38	90%
Baschieri & Pellagri 106	<<locked>>	81%	51909	81%	**66	100%
Baschieri & Pellagri 107	<<locked>>	81%	39479	62%	**84	95%
Hodgdon BL-C2	<<locked>>	81%	41075	64%	**33	98%
Hodgdon Benchmark	<<locked>>	81%	44411	70%	**97	99%
[Hodgdon CFE223]*	<<locked>>	81%	34519	54%	**95	93%
Hodgdon H322	<<locked>>	81%	44933	70%	**59	100%
Hodgdon H335	<<locked>>	81%	52214	82%	**84	100%
[Hodgdon H380]*	<<locked>>	81%	33953	53%	**43	92%
[Hodgdon H414]*	<<locked>>	88%	37884	59%	**80	90%
[Hodgdon Hybrid 100V]*	<<locked>>	84%	26150	41%	**43	90%
[Hodgdon LVR]*	<<locked>>	85%	31850	50%	**16	90%
[Hodgdon Superperformance]*	<<locked>>	93%	40785	64%	**43	90%
[Hodgdon VARGET]*	<<locked>>	81%	34069	53%	**20	94%
Hodgdon TrailBoss	<<locked>>	86%	28398	44%	**50	100%
IMR 3031	<<locked>>	81%	36245	57%	**41	100%
[IMR 4064]*	<<locked>>	81%	33547	53%	**00	94%
[IMR 4166 Enduron]*	<<locked>>	84%	37014	58%	**43	90%
IMR 4198	<<locked>>	81%	50183	79%	**53	100%
[IMR 4350]*	<<locked>>	93%	39465	62%	**44	90%
[IMR 4451 Enduron]*	<<locked>>	86%	37753	59%	**89	90%
[IMR 4831]*	<<locked>>	89%	28819	45%	**51	90%
IMR 4895	<<locked>>	81%	36883	58%	**41	96%
IMR 8208 XBR	<<locked>>	81%	42511	67%	**03	98%
Lovex D073.4	<<locked>>	81%	49763	78%	**15	100%
Lovex D073.5	<<locked>>	81%	47805	75%	**99	100%
Lovex D073.6	<<locked>>	81%	38827	61%	**71	99%
Lovex S060	<<locked>>	81%	41191	65%	**35	97%
Lovex S062	<<locked>>	81%	35882	56%	**72	97%
[Lovex S065]*	<<locked>>	85%	32982	52%	**90	90%
[Lovex S070]*	<<locked>>	90%	36201	57%	**85	90%
Norma 201	<<locked>>	81%	39508	62%	**41	98%
Norma 202	<<locked>>	81%	39726	62%	**61	99%
Norma 203B	<<locked>>	81%	35520	56%	**02	95%
[Norma URP]*	<<locked>>	85%	29834	47%	**80	90%
[Ramshot Big Game]*	<<locked>>	81%	34824	55%	**98	94%
[Ramshot Hunter]*	<<locked>>	92%	35505	56%	**21	90%
[Ramshot TAC]*	<<locked>>	81%	42395	66%	**90	94%
Ramshot Wild Boar	<<locked>>	81%	41408	65%	**20	97%
Ramshot X-Terminator	<<locked>>	81%	46006	72%	**56	98%
ReloadSwiss RS 14	<<locked>>	81%	26571	42%	**44	100%
ReloadSwiss RS 40	<<locked>>	81%	47732	75%	**99	100%
[ReloadSwiss RS 50]*	<<locked>>	82%	35273	55%	**46	90%
ReloadSwiss RS 52	<<locked>>	81%	33939	53%	**08	97%
[ReloadSwiss RS 60]*	<<locked>>	81%	28500	45%	**67	92%
[ReloadSwiss RS 62]*	<<locked>>	87%	30530	48%	**26	90%
[ReloadSwiss RS 70]*	<<locked>>	90%	34548	54%	**08	90%
Rottweil R 901	<<locked>>	81%	43511	68%	**00	100%
Rottweil R 902	<<locked>>	81%	37753	59%	**98	97%
[Rottweil R 903]*	<<locked>>	81%	30893	48%	**90	94%
[Rottweil R 907]*	<<locked>>	89%	39276	62%	**25	90%
SNPE Vectan SP 10	<<locked>>	81%	53200	83%	**90	100%
[SNPE Vectan SP 11]*	<<locked>>	81%	32169	50%	**36	93%
[SNPE Vectan SP 7]*	<<locked>>	81%	40553	64%	**64	94%
SNPE Vectan SP 9	<<locked>>	81%	39073	61%	**54	96%
SNPE Vectan Tubal 3000	<<locked>>	81%	41394	65%	**15	100%
SNPE Vectan Tubal 5000	<<locked>>	81%	34171	54%	**74	99%
[SNPE Vectan Tubal 7000]*	<<locked>>	89%	36114	57%	**33	90%
[Shooters World Long Rifle]*	<<locked>>	85%	32982	52%	**90	90%
Shooters World Match Rifle	<<locked>>	81%	38827	61%	**71	99%
Shooters World Precision	<<locked>>	81%	35882	56%	**72	97%
Shooters World Tactical Rifle	<<locked>>	81%	50285	79%	**08	99%
Somchem S321	<<locked>>	81%	45876	72%	**85	99%
Somchem S335	<<locked>>	81%	40567	64%	**12	100%
Somchem S341	<<locked>>	81%	40161	63%	**74	97%
[Somchem S355]*	<<locked>>	81%	31821	50%	**93	94%
[Somchem S365]*	<<locked>>	82%	24004	38%	**23	90%
Vihtavuori N130	<<locked>>	81%	45629	71%	**77	100%
Vihtavuori N133	<<locked>>	81%	38566	60%	**62	100%
Vihtavuori N135	<<locked>>	81%	31082	49%	**64	99%
Vihtavuori N140	<<locked>>	81%	36999	58%	**89	99%
[Vihtavuori N150]*	<<locked>>	81%	27224	43%	**52	94%
[Vihtavuori N160]*	<<locked>>	83%	30052	47%	**48	90%
Vihtavuori N530	<<locked>>	81%	44904	70%	**69	99%
Vihtavuori N540	<<locked>>	81%	36680	57%	**98	99%
[Vihtavuori N550]*	<<locked>>	83%	30153	47%	**93	90%
[Vihtavuori N555]*	<<locked>>	93%	28355	44%	**90	90%
[Winchester 6.5 StaBALL]*	<<locked>>	81%	27412	43%	**43	91%
Winchester 748	<<locked>>	81%	44947	70%	**05	99%
[Winchester 760]*	<<locked>>	88%	37884	59%	**80	90%
Winchester StaBALL Match	<<locked>>	81%	47485	74%	**41	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.