Load data for .256 Mag. Gibbs + .257 | 91gr | Peregrine VLR-5

Recommended Powder(s): ReloadSwiss RS 52, ReloadSwiss RS 60, Rottweil R 903

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.257 \| 91gr \| Peregrine VLR-5
Bullet Weight:	91gr \| 5.9g
Bullet Diameter:	0.257" \| 6.53mm
Bullet Length:	1.126" \| 28.6mm
Caliber:	.256 Mag. Gibbs load data
Case Length (l3):	2.173" \| 55.2mm
Cartridge Length (C.O.L.):	2.960" \| 75.2mm
Seated Depth:	0.339" \| 8.6mm
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_B8046_C231
Last updated:	2025-01-01
Recommended Twist Rate:	1:9 - 1:8

Load data for 110 loads in caliber .256 Mag. Gibbs with .257 | 91gr | Peregrine VLR-5 bullet and 55 powders such as ReloadSwiss RS 52, ReloadSwiss RS 60, Rottweil R 903. 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.
Case Length (Inch)
Case Length (mm)
CaseCapacity (GoW)
Min z (%)
Min FR (%)
Max FR*
Barrel Length (Inch)
Barrel Length (cm)
Safety Buffer (%)
.

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%	43976	89%	**92	97%
Accurate 4064	<<locked>>	86%	43729	89%	**15	100%
Accurate 4350	<<locked>>	95%	43555	88%	**74	96%
Alliant Reloder- TS 15.5	<<locked>>	87%	44106	89%	**35	98%
Alliant Reloder-15	<<locked>>	85%	43497	88%	**22	97%
Alliant Reloder-16	<<locked>>	96%	44048	89%	**97	96%
Alliant Reloder-17	<<locked>>	92%	44179	90%	**33	98%
[Alliant Reloder-23]*	<<locked>>	97%	32460	66%	**08	93%
Hodgdon CFE223	<<locked>>	86%	43642	88%	**58	96%
Hodgdon H380	<<locked>>	87%	44063	89%	**15	95%
[Hodgdon H414]*	<<locked>>	90%	43627	88%	**61	93%
Hodgdon Hybrid 100V	<<locked>>	97%	42192	86%	**12	97%
Hodgdon LVR	<<locked>>	92%	43816	89%	**54	95%
Hodgdon VARGET	<<locked>>	87%	43613	88%	**86	97%
Hodgdon TrailBoss	<<locked>>	96%	33243	67%	**69	100%
IMR 3031	<<locked>>	84%	43439	88%	**38	100%
IMR 4064	<<locked>>	88%	43918	89%	**92	97%
[IMR 4166 Enduron]*	<<locked>>	88%	44121	89%	**53	93%
[IMR 4350]*	<<locked>>	95%	43830	89%	**86	92%
[IMR 4451 Enduron]*	<<locked>>	89%	44019	89%	**69	92%
IMR 4831	<<locked>>	97%	39088	79%	**53	95%
IMR 4895	<<locked>>	84%	43671	89%	**48	97%
Lovex S062	<<locked>>	85%	43947	89%	**99	99%
Lovex S065	<<locked>>	92%	44367	90%	**99	95%
[Lovex S070]*	<<locked>>	93%	43787	89%	**02	93%
Norma 203B	<<locked>>	85%	43671	89%	**28	97%
Norma URP	<<locked>>	95%	44164	90%	**71	96%
Ramshot Big Game	<<locked>>	85%	43540	88%	**41	97%
[Ramshot Hunter]*	<<locked>>	96%	44367	90%	**81	94%
ReloadSwiss RS 14	<<locked>>	96%	33620	68%	**14	100%
[ReloadSwiss RS 50]*	<<locked>>	86%	44280	90%	**95	94%
ReloadSwiss RS 52 👍	<<locked>>	86%	43671	89%	**68	99%
ReloadSwiss RS 60 👍	<<locked>>	92%	43816	89%	**36	99%
ReloadSwiss RS 62	<<locked>>	96%	44280	90%	**07	96%
ReloadSwiss RS 70	<<locked>>	95%	43918	89%	**91	95%
Rottweil R 902	<<locked>>	84%	44222	90%	**86	99%
Rottweil R 903 👍	<<locked>>	90%	44237	90%	**31	98%
[Rottweil R 907]*	<<locked>>	91%	44266	90%	**72	92%
SNPE Vectan SP 11	<<locked>>	89%	44280	90%	**68	97%
SNPE Vectan Tubal 5000	<<locked>>	87%	44005	89%	**27	100%
[SNPE Vectan Tubal 7000]*	<<locked>>	92%	43555	88%	**20	93%
Shooters World Long Rifle	<<locked>>	92%	44367	90%	**99	95%
Shooters World Precision	<<locked>>	85%	43947	89%	**99	99%
Somchem S355	<<locked>>	89%	44048	89%	**22	98%
Somchem S365	<<locked>>	97%	40756	83%	**45	98%
Vihtavuori N133	<<locked>>	83%	43729	89%	**17	100%
Vihtavuori N135	<<locked>>	90%	44164	90%	**86	100%
Vihtavuori N140	<<locked>>	84%	43511	88%	**63	100%
Vihtavuori N150	<<locked>>	94%	43787	89%	**89	99%
Vihtavuori N160	<<locked>>	92%	43569	88%	**18	96%
Vihtavuori N540	<<locked>>	85%	44208	90%	**99	100%
Vihtavuori N550	<<locked>>	92%	44353	90%	**84	96%
[Vihtavuori N555]*	<<locked>>	97%	34316	70%	**87	93%
Winchester 6.5 StaBALL	<<locked>>	93%	44164	90%	**02	98%
[Winchester 760]*	<<locked>>	90%	43627	88%	**61	93%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AR 2208]*	<<locked>>	81%	36593	74%	**25	94%
Accurate 4064	<<locked>>	81%	36738	75%	**64	99%
[Accurate 4350]*	<<locked>>	85%	30168	61%	**23	90%
Alliant Reloder- TS 15.5	<<locked>>	81%	35708	72%	**41	96%
Alliant Reloder-15	<<locked>>	81%	38348	78%	**00	95%
[Alliant Reloder-16]*	<<locked>>	85%	31720	64%	**59	90%
[Alliant Reloder-17]*	<<locked>>	81%	31053	63%	**66	92%
[Alliant Reloder-23]*	<<locked>>	93%	28776	58%	**77	90%
[Hodgdon CFE223]*	<<locked>>	81%	36956	75%	**94	94%
[Hodgdon H380]*	<<locked>>	81%	36434	74%	**35	93%
[Hodgdon H414]*	<<locked>>	87%	38479	78%	**30	90%
[Hodgdon Hybrid 100V]*	<<locked>>	83%	26977	55%	**85	90%
[Hodgdon LVR]*	<<locked>>	83%	32561	66%	**72	90%
[Hodgdon VARGET]*	<<locked>>	81%	36129	73%	**12	94%
Hodgdon TrailBoss	<<locked>>	81%	26382	54%	**04	100%
IMR 3031	<<locked>>	81%	38870	79%	**36	100%
[IMR 4064]*	<<locked>>	81%	35520	72%	**85	94%
[IMR 4166 Enduron]*	<<locked>>	83%	38290	78%	**08	90%
[IMR 4350]*	<<locked>>	92%	40350	82%	**13	90%
[IMR 4451 Enduron]*	<<locked>>	85%	38116	77%	**41	90%
[IMR 4831]*	<<locked>>	89%	30168	61%	**03	90%
IMR 4895	<<locked>>	81%	39320	80%	**43	96%
Lovex S062	<<locked>>	81%	37768	77%	**58	97%
[Lovex S065]*	<<locked>>	84%	33852	69%	**36	90%
[Lovex S070]*	<<locked>>	88%	37072	75%	**38	90%
Norma 203B	<<locked>>	81%	37724	77%	**97	96%
[Norma URP]*	<<locked>>	84%	30835	63%	**33	90%
Ramshot Big Game	<<locked>>	81%	37565	76%	**07	95%
[Ramshot Hunter]*	<<locked>>	90%	36201	73%	**77	90%
ReloadSwiss RS 14	<<locked>>	81%	26861	54%	**54	100%
[ReloadSwiss RS 50]*	<<locked>>	81%	36695	74%	**15	91%
ReloadSwiss RS 52	<<locked>>	81%	36695	74%	**13	97%
[ReloadSwiss RS 60]*	<<locked>>	81%	30371	62%	**53	93%
[ReloadSwiss RS 62]*	<<locked>>	86%	32169	65%	**95	90%
[ReloadSwiss RS 70]*	<<locked>>	88%	35027	71%	**58	90%
Rottweil R 902	<<locked>>	81%	39682	80%	**87	98%
Rottweil R 903	<<locked>>	81%	33083	67%	**69	95%
[Rottweil R 907]*	<<locked>>	88%	39842	81%	**71	90%
[SNPE Vectan SP 11]*	<<locked>>	81%	34505	70%	**25	94%
SNPE Vectan Tubal 5000	<<locked>>	81%	36056	73%	**56	99%
[SNPE Vectan Tubal 7000]*	<<locked>>	87%	37333	76%	**89	90%
[Shooters World Long Rifle]*	<<locked>>	84%	33852	69%	**36	90%
Shooters World Precision	<<locked>>	81%	37768	77%	**58	97%
Somchem S355	<<locked>>	81%	34084	69%	**82	95%
[Somchem S365]*	<<locked>>	82%	25106	51%	**75	90%
Vihtavuori N133	<<locked>>	81%	40915	83%	**61	100%
Vihtavuori N135	<<locked>>	81%	33083	67%	**43	99%
Vihtavuori N140	<<locked>>	81%	39204	79%	**74	99%
[Vihtavuori N150]*	<<locked>>	81%	28950	59%	**15	94%
[Vihtavuori N160]*	<<locked>>	82%	31140	63%	**03	90%
Vihtavuori N540	<<locked>>	81%	39073	79%	**90	99%
[Vihtavuori N550]*	<<locked>>	82%	30922	63%	**33	90%
[Vihtavuori N555]*	<<locked>>	92%	29530	60%	**40	90%
[Winchester 6.5 StaBALL]*	<<locked>>	81%	29022	59%	**05	92%
[Winchester 760]*	<<locked>>	87%	38479	78%	**30	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.

<<locked>>... you need to buy an access license to unlock the data