Load data for .256 Mag. Gibbs + .257 | 98gr | Hasler ARIETE

Recommended Powder(s): Alliant Reloder-17, ReloadSwiss RS 52, ReloadSwiss RS 60, Rottweil R 903, Somchem S365

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.257 \| 98gr \| Hasler ARIETE
Manufacturer SKU:	A257-98
Bullet Weight:	98gr \| 6.4g
Bullet Diameter:	0.257" \| 6.53mm
Bullet Length:	1.179" \| 29.9mm
Caliber:	.256 Mag. Gibbs load data
Case Length (l3):	2.173" \| 55.2mm
Cartridge Length (C.O.L.):	3.004" \| 76.3mm
Seated Depth:	0.348" \| 8.8mm
Shank Seated Depth:	0.215" \| 5.5mm
Case Capacity:	56.0 Grains of Water \| 3.64 cm³
Primer Size:	Large Rifle (LR)
Max. allowed Pressure:	49313 psi \| 3400 bar
LID:	LID_B7052_C231
Last updated:	2025-01-01
Recommended Twist Rate:	1:9 - 1:8

Load data for 118 loads in caliber .256 Mag. Gibbs with .257 | 98gr | Hasler ARIETE bullet and 59 powders such as Alliant Reloder-17, ReloadSwiss RS 52, ReloadSwiss RS 60, Rottweil R 903, Somchem S365. 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 2208	<<locked>>	87%	43888	89%	**04	97%
[Accurate 2700]*	<<locked>>	88%	43787	89%	**35	92%
Accurate 4064	<<locked>>	87%	43627	88%	**27	100%
Accurate 4350	<<locked>>	95%	43859	89%	**92	97%
Alliant Reloder- TS 15.5	<<locked>>	88%	44309	90%	**49	99%
Alliant Reloder-15	<<locked>>	85%	43758	89%	**49	98%
Alliant Reloder-16	<<locked>>	96%	44135	90%	**22	97%
Alliant Reloder-17 👍	<<locked>>	92%	44251	90%	**41	99%
[Alliant Reloder-23]*	<<locked>>	97%	31937	65%	**30	94%
[Alliant Reloder-26]*	<<locked>>	97%	34896	71%	**48	92%
Hodgdon CFE223	<<locked>>	86%	43671	89%	**76	97%
Hodgdon H380	<<locked>>	87%	43656	89%	**30	96%
[Hodgdon H414]*	<<locked>>	90%	43830	89%	**76	94%
[Hodgdon H4350]*	<<locked>>	96%	43627	88%	**07	93%
Hodgdon Hybrid 100V	<<locked>>	97%	41669	85%	**20	98%
Hodgdon LVR	<<locked>>	93%	44382	90%	**82	96%
[Hodgdon Superperformance]*	<<locked>>	93%	43961	89%	**89	93%
Hodgdon VARGET	<<locked>>	87%	43888	89%	**04	97%
Hodgdon TrailBoss	<<locked>>	96%	32996	67%	**96	100%
IMR 3031	<<locked>>	85%	44237	90%	**63	100%
IMR 4064	<<locked>>	88%	44179	90%	**07	98%
[IMR 4166 Enduron]*	<<locked>>	88%	43903	89%	**64	94%
[IMR 4350]*	<<locked>>	95%	43918	89%	**10	93%
[IMR 4451 Enduron]*	<<locked>>	89%	43526	88%	**81	93%
IMR 4831	<<locked>>	97%	38899	79%	**64	95%
IMR 4895	<<locked>>	84%	43816	89%	**59	98%
Lovex S062	<<locked>>	86%	43830	89%	**13	99%
Lovex S065	<<locked>>	92%	44034	89%	**07	95%
[Lovex S070]*	<<locked>>	94%	44367	90%	**33	94%
Norma 203B	<<locked>>	86%	43961	89%	**56	98%
Norma URP	<<locked>>	95%	44280	90%	**89	97%
Ramshot Big Game	<<locked>>	85%	43453	88%	**53	98%
Ramshot Hunter	<<locked>>	95%	43671	89%	**79	95%
ReloadSwiss RS 14	<<locked>>	96%	33315	68%	**42	100%
[ReloadSwiss RS 50]*	<<locked>>	86%	43482	88%	**94	94%
ReloadSwiss RS 52 👍	<<locked>>	86%	43627	88%	**86	99%
ReloadSwiss RS 60 👍	<<locked>>	92%	43990	89%	**61	99%
ReloadSwiss RS 62	<<locked>>	95%	43990	89%	**18	97%
ReloadSwiss RS 70	<<locked>>	95%	44077	89%	**25	96%
Rottweil R 902	<<locked>>	84%	43918	89%	**97	99%
Rottweil R 903 👍	<<locked>>	90%	43700	89%	**40	99%
[Rottweil R 907]*	<<locked>>	91%	44034	89%	**97	93%
SNPE Vectan SP 11	<<locked>>	89%	44208	90%	**79	98%
SNPE Vectan Tubal 5000	<<locked>>	87%	43656	89%	**28	100%
[SNPE Vectan Tubal 7000]*	<<locked>>	92%	43584	88%	**41	94%
Shooters World Long Rifle	<<locked>>	92%	44034	89%	**07	95%
Shooters World Precision	<<locked>>	86%	43830	89%	**13	99%
Somchem S355	<<locked>>	89%	43642	88%	**33	98%
Somchem S365 👍	<<locked>>	97%	40741	83%	**63	99%
Vihtavuori N133	<<locked>>	83%	43642	89%	**28	100%
Vihtavuori N135	<<locked>>	90%	43845	89%	**90	100%
Vihtavuori N140	<<locked>>	84%	43816	89%	**87	100%
Vihtavuori N150	<<locked>>	94%	44063	89%	**04	99%
Vihtavuori N160	<<locked>>	92%	44193	90%	**49	97%
Vihtavuori N540	<<locked>>	85%	43932	89%	**10	100%
Vihtavuori N550	<<locked>>	92%	44309	90%	**95	97%
[Vihtavuori N555]*	<<locked>>	97%	34301	70%	**15	94%
Winchester 6.5 StaBALL	<<locked>>	93%	43743	89%	**17	99%
[Winchester 760]*	<<locked>>	90%	43830	89%	**76	94%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AR 2208	<<locked>>	81%	35984	73%	**30	95%
[Accurate 2700]*	<<locked>>	84%	37681	76%	**03	90%
Accurate 4064	<<locked>>	81%	35375	72%	**49	99%
[Accurate 4350]*	<<locked>>	84%	28239	57%	**02	90%
Alliant Reloder- TS 15.5	<<locked>>	81%	35404	72%	**53	97%
Alliant Reloder-15	<<locked>>	81%	38290	78%	**18	96%
[Alliant Reloder-16]*	<<locked>>	84%	29776	60%	**21	90%
[Alliant Reloder-17]*	<<locked>>	81%	30458	62%	**87	93%
[Alliant Reloder-23]*	<<locked>>	92%	26919	55%	**59	90%
[Alliant Reloder-26]*	<<locked>>	94%	31923	65%	**66	90%
Hodgdon CFE223	<<locked>>	81%	36724	74%	**15	95%
[Hodgdon H380]*	<<locked>>	81%	35723	72%	**49	93%
[Hodgdon H414]*	<<locked>>	85%	35868	73%	**92	90%
[Hodgdon H4350]*	<<locked>>	92%	38247	78%	**79	90%
[Hodgdon Hybrid 100V]*	<<locked>>	82%	25309	51%	**67	90%
[Hodgdon LVR]*	<<locked>>	82%	30284	61%	**35	90%
[Hodgdon Superperformance]*	<<locked>>	89%	38464	78%	**58	90%
Hodgdon VARGET	<<locked>>	81%	35984	73%	**30	95%
Hodgdon TrailBoss	<<locked>>	81%	26078	53%	**39	100%
IMR 3031	<<locked>>	81%	38435	78%	**35	100%
IMR 4064	<<locked>>	81%	35331	72%	**03	95%
[IMR 4166 Enduron]*	<<locked>>	81%	35375	72%	**67	90%
[IMR 4350]*	<<locked>>	90%	37797	77%	**76	90%
[IMR 4451 Enduron]*	<<locked>>	83%	35839	73%	**00	90%
[IMR 4831]*	<<locked>>	87%	28152	57%	**75	90%
IMR 4895	<<locked>>	81%	39276	80%	**61	97%
Lovex S062	<<locked>>	81%	37420	76%	**69	98%
[Lovex S065]*	<<locked>>	82%	31691	64%	**05	90%
[Lovex S070]*	<<locked>>	87%	34969	71%	**07	90%
Norma 203B	<<locked>>	81%	37666	76%	**05	96%
[Norma URP]*	<<locked>>	83%	28776	58%	**95	90%
Ramshot Big Game	<<locked>>	81%	37333	76%	**18	96%
[Ramshot Hunter]*	<<locked>>	88%	33649	68%	**36	90%
ReloadSwiss RS 14	<<locked>>	81%	26397	54%	**81	100%
[ReloadSwiss RS 50]*	<<locked>>	81%	36593	74%	**40	92%
ReloadSwiss RS 52	<<locked>>	81%	36303	74%	**12	98%
[ReloadSwiss RS 60]*	<<locked>>	81%	29733	60%	**64	94%
[ReloadSwiss RS 62]*	<<locked>>	85%	29878	61%	**57	90%
[ReloadSwiss RS 70]*	<<locked>>	86%	32561	66%	**20	90%
Rottweil R 902	<<locked>>	81%	39349	80%	**95	98%
Rottweil R 903	<<locked>>	81%	32329	66%	**74	95%
[Rottweil R 907]*	<<locked>>	86%	36883	75%	**33	90%
SNPE Vectan SP 11	<<locked>>	81%	33924	69%	**33	95%
SNPE Vectan Tubal 5000	<<locked>>	81%	35563	72%	**61	100%
[SNPE Vectan Tubal 7000]*	<<locked>>	85%	34461	70%	**44	90%
[Shooters World Long Rifle]*	<<locked>>	82%	31691	64%	**05	90%
Shooters World Precision	<<locked>>	81%	37420	76%	**69	98%
Somchem S355	<<locked>>	81%	33315	68%	**90	95%
[Somchem S365]*	<<locked>>	81%	23714	48%	**61	91%
Vihtavuori N133	<<locked>>	81%	40814	83%	**72	100%
Vihtavuori N135	<<locked>>	81%	32271	65%	**41	100%
Vihtavuori N140	<<locked>>	81%	39204	79%	**89	100%
Vihtavuori N150	<<locked>>	81%	28442	58%	**33	95%
[Vihtavuori N160]*	<<locked>>	81%	29486	60%	**85	91%
Vihtavuori N540	<<locked>>	81%	38595	78%	**95	99%
[Vihtavuori N550]*	<<locked>>	81%	29559	60%	**21	90%
[Vihtavuori N555]*	<<locked>>	91%	27920	57%	**25	91%
[Winchester 6.5 StaBALL]*	<<locked>>	81%	28572	58%	**26	93%
[Winchester 760]*	<<locked>>	85%	35868	73%	**92	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.