Load data for .256 Mag. Gibbs + .257 | 75gr | Sierra HP Varminter

Recommended Powder(s): Accurate 4064, IMR 3031, Lovex D073.6, Norma 202, Shooters World Match Rifle

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.257 \| 75gr \| Sierra HP Varminter
Manufacturer SKU:	1600
Bullet Weight:	75gr \| 4.9g
Bullet Diameter:	0.257" \| 6.53mm
Bullet Length:	0.751" \| 19.1mm
Caliber:	.256 Mag. Gibbs load data
Case Length (l3):	2.173" \| 55.2mm
Cartridge Length (C.O.L.):	2.802" \| 71.2mm
Seated Depth:	0.122" \| 3.1mm
Shank Seated Depth:	0.122" \| 3.1mm
Case Capacity:	56.0 Grains of Water \| 3.64 cm³
Primer Size:	Large Rifle (LR)
Max. allowed Pressure:	49313 psi \| 3400 bar
LID:	LID_B5787_C231
Last updated:	2025-01-01

Load data for 116 loads in caliber .256 Mag. Gibbs with .257 | 75gr | Sierra HP Varminter bullet and 58 powders such as Accurate 4064, IMR 3031, Lovex D073.6, Norma 202, Shooters World Match Rifle. 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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Min z (%)
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Safety Buffer (%)
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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>>	85%	44077	89%	**74	95%
[ADI AR 2208]*	<<locked>>	89%	43395	88%	**35	94%
Accurate 2495	<<locked>>	84%	43772	89%	**87	100%
Accurate 2520	<<locked>>	83%	43743	89%	**78	98%
Accurate 4064 👍	<<locked>>	90%	44324	90%	**97	99%
[Accurate 4350]*	<<locked>>	97%	41263	84%	**55	93%
Alliant AR-Comp	<<locked>>	84%	43903	89%	**87	100%
Alliant Reloder- TS 15.5	<<locked>>	90%	43990	89%	**91	97%
Alliant Reloder-15	<<locked>>	88%	43584	88%	**84	95%
[Alliant Reloder-16]*	<<locked>>	97%	41539	84%	**58	93%
Alliant Reloder-17	<<locked>>	94%	44295	90%	**73	96%
[Baschieri & Pellagri 107]*	<<locked>>	85%	43830	89%	**68	94%
Hodgdon BL-C2	<<locked>>	84%	44251	90%	**01	97%
[Hodgdon CFE223]*	<<locked>>	89%	44237	90%	**17	94%
[Hodgdon H380]*	<<locked>>	89%	43685	89%	**51	93%
[Hodgdon Hybrid 100V]*	<<locked>>	96%	37666	76%	**20	93%
[Hodgdon LVR]*	<<locked>>	96%	44092	89%	**97	93%
Hodgdon VARGET	<<locked>>	90%	43874	89%	**45	95%
Hodgdon TrailBoss	<<locked>>	96%	32474	66%	**62	100%
IMR 3031 👍	<<locked>>	88%	44222	90%	**27	100%
IMR 4064	<<locked>>	91%	44353	90%	**48	95%
IMR 4895	<<locked>>	87%	43801	89%	**01	96%
Lovex D073.6 👍	<<locked>>	86%	44135	89%	**87	99%
Lovex S060	<<locked>>	84%	44019	89%	**02	96%
Lovex S062	<<locked>>	89%	43947	89%	**55	97%
[Lovex S065]*	<<locked>>	95%	44063	89%	**28	92%
Norma 201	<<locked>>	85%	43569	88%	**41	97%
Norma 202 👍	<<locked>>	85%	44309	90%	**68	99%
Norma 203B	<<locked>>	88%	43627	88%	**87	95%
[Norma URP]*	<<locked>>	96%	41176	83%	**45	93%
Ramshot Big Game	<<locked>>	88%	43714	89%	**87	95%
Ramshot Wild Boar	<<locked>>	83%	43772	89%	**61	95%
ReloadSwiss RS 14	<<locked>>	97%	33141	67%	**21	100%
ReloadSwiss RS 52	<<locked>>	89%	44019	89%	**40	98%
ReloadSwiss RS 60	<<locked>>	95%	43932	89%	**66	97%
[ReloadSwiss RS 62]*	<<locked>>	97%	41510	84%	**78	92%
Rottweil R 902	<<locked>>	87%	43830	89%	**35	97%
Rottweil R 903	<<locked>>	93%	44179	90%	**87	96%
SNPE Vectan SP 11	<<locked>>	91%	43743	89%	**04	95%
[SNPE Vectan SP 7]*	<<locked>>	84%	44266	90%	**32	93%
SNPE Vectan SP 9	<<locked>>	85%	43584	88%	**45	95%
SNPE Vectan Tubal 3000	<<locked>>	84%	44324	90%	**89	99%
SNPE Vectan Tubal 5000	<<locked>>	90%	43976	89%	**79	100%
[Shooters World Long Rifle]*	<<locked>>	95%	44063	89%	**28	92%
Shooters World Match Rifle 👍	<<locked>>	86%	44135	89%	**87	99%
Shooters World Precision	<<locked>>	89%	43947	89%	**55	97%
Somchem S335	<<locked>>	84%	43947	89%	**89	99%
Somchem S341	<<locked>>	84%	43714	89%	**35	95%
Somchem S355	<<locked>>	92%	43990	89%	**78	96%
Somchem S365	<<locked>>	97%	36738	74%	**73	95%
Vihtavuori N133	<<locked>>	86%	44063	89%	**96	100%
Vihtavuori N135	<<locked>>	93%	43903	89%	**45	100%
Vihtavuori N140	<<locked>>	87%	43888	89%	**32	99%
Vihtavuori N150	<<locked>>	97%	43192	88%	**19	97%
[Vihtavuori N160]*	<<locked>>	96%	44367	90%	**68	94%
Vihtavuori N540	<<locked>>	88%	44280	90%	**68	99%
[Vihtavuori N550]*	<<locked>>	95%	43439	88%	**04	93%
Winchester 6.5 StaBALL	<<locked>>	96%	43787	89%	**25	96%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AR 2206H]*	<<locked>>	81%	39073	79%	**53	94%
[ADI AR 2208]*	<<locked>>	81%	33431	68%	**69	90%
Accurate 2495	<<locked>>	81%	39160	79%	**86	100%
Accurate 2520	<<locked>>	81%	40190	81%	**86	98%
Accurate 4064	<<locked>>	81%	32924	67%	**02	96%
[Accurate 4350]*	<<locked>>	93%	35244	71%	**07	90%
Alliant AR-Comp	<<locked>>	81%	40103	81%	**15	100%
[Alliant Reloder- TS 15.5]*	<<locked>>	81%	32169	65%	**76	92%
[Alliant Reloder-15]*	<<locked>>	81%	34954	71%	**51	91%
[Alliant Reloder-16]*	<<locked>>	93%	37014	75%	**36	90%
[Alliant Reloder-17]*	<<locked>>	86%	32895	67%	**41	90%
[Baschieri & Pellagri 107]*	<<locked>>	81%	38014	77%	**23	92%
Hodgdon BL-C2	<<locked>>	81%	39987	81%	**02	96%
[Hodgdon CFE223]*	<<locked>>	83%	35549	72%	**84	90%
[Hodgdon H380]*	<<locked>>	85%	37188	75%	**87	90%
[Hodgdon Hybrid 100V]*	<<locked>>	91%	31894	65%	**56	90%
[Hodgdon LVR]*	<<locked>>	91%	38218	78%	**59	90%
[Hodgdon VARGET]*	<<locked>>	82%	33721	68%	**76	90%
Hodgdon TrailBoss	<<locked>>	81%	26034	53%	**95	100%
IMR 3031	<<locked>>	81%	34708	70%	**94	98%
[IMR 4064]*	<<locked>>	81%	32532	66%	**36	90%
[IMR 4895]*	<<locked>>	81%	35665	72%	**81	92%
Lovex D073.6	<<locked>>	81%	37289	76%	**14	97%
[Lovex S060]*	<<locked>>	81%	39769	81%	**91	94%
[Lovex S062]*	<<locked>>	81%	34403	70%	**05	94%
[Lovex S065]*	<<locked>>	91%	39088	79%	**07	90%
Norma 201	<<locked>>	81%	38580	78%	**07	95%
Norma 202	<<locked>>	81%	38261	78%	**27	98%
[Norma 203B]*	<<locked>>	81%	34214	69%	**31	92%
[Norma URP]*	<<locked>>	93%	36361	74%	**17	90%
[Ramshot Big Game]*	<<locked>>	81%	33881	69%	**25	91%
[Ramshot Wild Boar]*	<<locked>>	81%	40248	82%	**79	94%
ReloadSwiss RS 14	<<locked>>	81%	25889	53%	**34	100%
[ReloadSwiss RS 52]*	<<locked>>	81%	32822	67%	**38	93%
[ReloadSwiss RS 60]*	<<locked>>	86%	32227	65%	**15	90%
[ReloadSwiss RS 62]*	<<locked>>	94%	37550	76%	**73	91%
Rottweil R 902	<<locked>>	81%	36521	74%	**48	95%
[Rottweil R 903]*	<<locked>>	81%	29515	60%	**90	90%
[SNPE Vectan SP 11]*	<<locked>>	82%	32387	66%	**92	90%
[SNPE Vectan SP 7]*	<<locked>>	81%	39088	79%	**04	91%
[SNPE Vectan SP 9]*	<<locked>>	81%	37782	77%	**10	93%
SNPE Vectan Tubal 3000	<<locked>>	81%	40132	81%	**91	98%
SNPE Vectan Tubal 5000	<<locked>>	81%	32793	66%	**07	97%
[Shooters World Long Rifle]*	<<locked>>	91%	39088	79%	**07	90%
Shooters World Match Rifle	<<locked>>	81%	37289	76%	**14	97%
[Shooters World Precision]*	<<locked>>	81%	34403	70%	**05	94%
Somchem S335	<<locked>>	81%	39653	80%	**91	99%
[Somchem S341]*	<<locked>>	81%	38783	79%	**14	93%
[Somchem S355]*	<<locked>>	81%	30951	63%	**17	91%
[Somchem S365]*	<<locked>>	89%	28921	59%	**13	90%
Vihtavuori N133	<<locked>>	81%	37347	76%	**38	99%
Vihtavuori N135	<<locked>>	81%	29733	60%	**87	97%
Vihtavuori N140	<<locked>>	81%	35665	72%	**31	97%
[Vihtavuori N150]*	<<locked>>	82%	27180	55%	**79	90%
[Vihtavuori N160]*	<<locked>>	90%	36143	73%	**64	90%
Vihtavuori N540	<<locked>>	81%	35520	72%	**51	97%
[Vihtavuori N550]*	<<locked>>	89%	36100	73%	**14	90%
[Winchester 6.5 StaBALL]*	<<locked>>	86%	31531	64%	**81	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.