Load data for .256 Mag. Gibbs + .257 | 70gr | CutEdge ESP Raptor

Recommended Powder(s):

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.257 \| 70gr \| CutEdge ESP Raptor
Manufacturer SKU:	ESP I70 RAPTOR WoT
Bullet Weight:	70gr \| 4.5g
Bullet Diameter:	0.257" \| 6.53mm
Bullet Length:	<<locked>>
Caliber:	.256 Mag. Gibbs load data
Case Length (l3):	2.173" \| 55.2mm
Cartridge Length (C.O.L.):	<<locked>>
Seated Depth:	<<locked>>
Shank Seated Depth:	<<locked>>
Case Capacity:	56.0 Grains of Water \| 3.64 cm³
Primer Size:	Large Rifle (LR)
Max. allowed Pressure:	49313 psi \| 3400 bar
LID:	LID_B8416_C231
Last updated:	2026-03-28

Load data for 122 loads in caliber .256 Mag. Gibbs with .257 | 70gr | CutEdge ESP Raptor bullet and 61 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 "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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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 2206H	<<locked>>	87%	44266	90%	**73	95%
[ADI AR 2208]*	<<locked>>	92%	43976	89%	**37	94%
ADI Benchmark 8208	<<locked>>	85%	43976	89%	**40	96%
[Accurate 2200]*	<<locked>>	85%	43555	88%	**94	92%
Accurate 2495 👍	<<locked>>	87%	43918	89%	**89	100%
Accurate 2520	<<locked>>	86%	43511	88%	**60	98%
Accurate 4064 👍	<<locked>>	92%	43439	88%	**73	99%
Alliant AR-Comp	<<locked>>	86%	43874	89%	**96	100%
[Alliant Power Pro 2000-MR]*	<<locked>>	90%	44237	90%	**42	93%
Alliant Reloder- TS 15.5	<<locked>>	93%	44005	89%	**83	96%
[Alliant Reloder-15]*	<<locked>>	90%	43627	88%	**76	94%
Alliant Reloder-17	<<locked>>	96%	43613	88%	**35	95%
[Baschieri & Pellagri 107]*	<<locked>>	87%	43874	89%	**66	93%
Bofors RP3	<<locked>>	93%	43961	89%	**83	96%
Hodgdon BL-C2	<<locked>>	86%	44309	90%	**96	96%
Hodgdon Benchmark	<<locked>>	83%	43845	89%	**87	97%
[Hodgdon CFE223]*	<<locked>>	91%	43395	88%	**79	93%
Hodgdon H322 👍	<<locked>>	84%	44135	90%	**79	99%
[Hodgdon H380]*	<<locked>>	92%	43772	89%	**43	92%
Hodgdon H4895	<<locked>>	86%	43700	89%	**60	95%
[Hodgdon VARGET]*	<<locked>>	93%	44295	90%	**40	94%
Hodgdon TrailBoss	<<locked>>	96%	31865	65%	**31	100%
IMR 3031 👍	<<locked>>	91%	44324	90%	**32	100%
[IMR 4064]*	<<locked>>	93%	43700	89%	**27	94%
IMR 4895	<<locked>>	90%	43685	89%	**89	95%
IMR 8208 XBR	<<locked>>	85%	43976	89%	**40	96%
Lovex D073.6	<<locked>>	88%	43888	89%	**79	98%
Lovex S060	<<locked>>	86%	43729	89%	**78	95%
Lovex S062	<<locked>>	91%	43990	89%	**53	96%
Norma 201	<<locked>>	88%	44338	90%	**43	96%
Norma 202	<<locked>>	87%	43642	89%	**56	98%
Norma 203B	<<locked>>	91%	43656	89%	**79	95%
[Ramshot Big Game]*	<<locked>>	91%	43990	89%	**89	94%
[Ramshot Wild Boar]*	<<locked>>	86%	43888	89%	**50	94%
ReloadSwiss RS 14	<<locked>>	97%	32343	66%	**87	100%
[ReloadSwiss RS 52]*	<<locked>>	89%	43540	88%	**35	94%
ReloadSwiss RS 60	<<locked>>	94%	43918	89%	**65	98%
Rottweil R 901	<<locked>>	85%	43598	88%	**23	98%
Rottweil R 902	<<locked>>	89%	43801	89%	**20	96%
Rottweil R 903	<<locked>>	95%	43845	89%	**73	96%
[SNPE Vectan SP 11]*	<<locked>>	94%	43714	89%	**86	94%
[SNPE Vectan SP 7]*	<<locked>>	87%	44222	90%	**17	92%
SNPE Vectan SP 9	<<locked>>	88%	43743	89%	**50	95%
SNPE Vectan Tubal 3000	<<locked>>	86%	44034	89%	**74	98%
SNPE Vectan Tubal 5000	<<locked>>	92%	43555	88%	**68	99%
Shooters World Match Rifle	<<locked>>	88%	43888	89%	**79	98%
Shooters World Precision	<<locked>>	91%	43990	89%	**53	96%
Somchem S335	<<locked>>	87%	44048	89%	**94	99%
[Somchem S341]*	<<locked>>	87%	43976	89%	**27	94%
Somchem S355	<<locked>>	94%	43714	89%	**63	95%
[Somchem S365]*	<<locked>>	97%	33504	68%	**43	92%
Vihtavuori N133	<<locked>>	88%	43743	89%	**84	100%
Vihtavuori N135	<<locked>>	96%	43888	89%	**46	100%
Vihtavuori N140	<<locked>>	90%	44034	89%	**30	99%
Vihtavuori N150	<<locked>>	97%	39523	80%	**35	96%
[Vihtavuori N160]*	<<locked>>	97%	42670	87%	**14	92%
Vihtavuori N530	<<locked>>	84%	43801	89%	**53	96%
Vihtavuori N540	<<locked>>	89%	43671	89%	**37	98%
[Vihtavuori N550]*	<<locked>>	97%	42322	86%	**66	92%
Winchester 6.5 StaBALL	<<locked>>	97%	42438	86%	**61	95%
Winchester 748	<<locked>>	83%	43337	88%	**79	97%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AR 2206H]*	<<locked>>	81%	35998	73%	**59	91%
[ADI AR 2208]*	<<locked>>	86%	35723	72%	**10	90%
[ADI Benchmark 8208]*	<<locked>>	81%	38029	77%	**92	94%
[Accurate 2200]*	<<locked>>	81%	38319	78%	**69	90%
Accurate 2495	<<locked>>	81%	35012	71%	**69	98%
Accurate 2520	<<locked>>	81%	36608	74%	**99	96%
[Accurate 4064]*	<<locked>>	81%	29399	60%	**86	94%
Alliant AR-Comp	<<locked>>	81%	36550	74%	**25	100%
[Alliant Power Pro 2000-MR]*	<<locked>>	86%	39189	79%	**04	90%
[Alliant Reloder- TS 15.5]*	<<locked>>	82%	30618	62%	**15	90%
[Alliant Reloder-15]*	<<locked>>	84%	35404	72%	**46	90%
[Alliant Reloder-17]*	<<locked>>	90%	34809	71%	**79	90%
[Baschieri & Pellagri 107]*	<<locked>>	83%	37347	76%	**96	90%
[Bofors RP3]*	<<locked>>	83%	31053	63%	**35	90%
[Hodgdon BL-C2]*	<<locked>>	81%	36550	74%	**99	93%
Hodgdon Benchmark	<<locked>>	81%	40408	82%	**09	96%
[Hodgdon CFE223]*	<<locked>>	87%	38464	78%	**51	91%
Hodgdon H322	<<locked>>	81%	40408	82%	**81	98%
[Hodgdon H380]*	<<locked>>	89%	39494	80%	**38	90%
[Hodgdon H4895]*	<<locked>>	81%	36201	73%	**63	92%
[Hodgdon VARGET]*	<<locked>>	86%	36143	73%	**20	90%
Hodgdon TrailBoss	<<locked>>	81%	25411	52%	**54	100%
IMR 3031	<<locked>>	81%	31647	64%	**97	97%
[IMR 4064]*	<<locked>>	86%	34722	70%	**87	90%
[IMR 4895]*	<<locked>>	82%	33997	69%	**33	91%
[IMR 8208 XBR]*	<<locked>>	81%	38029	77%	**92	94%
Lovex D073.6	<<locked>>	81%	33924	69%	**23	95%
[Lovex S060]*	<<locked>>	81%	37217	75%	**17	92%
[Lovex S062]*	<<locked>>	81%	31444	64%	**02	91%
[Norma 201]*	<<locked>>	81%	35259	71%	**17	93%
Norma 202	<<locked>>	81%	35172	71%	**36	96%
[Norma 203B]*	<<locked>>	83%	33924	69%	**07	90%
[Ramshot Big Game]*	<<locked>>	84%	35041	71%	**43	90%
[Ramshot Wild Boar]*	<<locked>>	81%	37043	75%	**82	92%
ReloadSwiss RS 14	<<locked>>	81%	25164	51%	**93	100%
[ReloadSwiss RS 52]*	<<locked>>	83%	35868	73%	**28	90%
[ReloadSwiss RS 60]*	<<locked>>	84%	30443	62%	**38	90%
Rottweil R 901	<<locked>>	81%	38566	78%	**05	97%
[Rottweil R 902]*	<<locked>>	81%	33344	68%	**48	92%
[Rottweil R 903]*	<<locked>>	86%	31546	64%	**35	90%
[SNPE Vectan SP 11]*	<<locked>>	86%	34243	69%	**33	90%
[SNPE Vectan SP 7]*	<<locked>>	84%	39827	81%	**12	90%
[SNPE Vectan SP 9]*	<<locked>>	81%	34795	71%	**04	91%
SNPE Vectan Tubal 3000	<<locked>>	81%	37173	75%	**14	97%
SNPE Vectan Tubal 5000	<<locked>>	81%	30182	61%	**20	95%
Shooters World Match Rifle	<<locked>>	81%	33924	69%	**23	95%
[Shooters World Precision]*	<<locked>>	81%	31444	64%	**02	91%
Somchem S335	<<locked>>	81%	36680	74%	**10	97%
[Somchem S341]*	<<locked>>	81%	35723	72%	**17	91%
[Somchem S355]*	<<locked>>	85%	31894	65%	**38	90%
[Somchem S365]*	<<locked>>	94%	30850	63%	**54	90%
Vihtavuori N133	<<locked>>	81%	34519	70%	**54	98%
Vihtavuori N135	<<locked>>	81%	26818	54%	**77	95%
Vihtavuori N140	<<locked>>	81%	32750	66%	**41	96%
[Vihtavuori N150]*	<<locked>>	87%	28485	58%	**10	90%
[Vihtavuori N160]*	<<locked>>	94%	38334	78%	**09	90%
Vihtavuori N530	<<locked>>	81%	40248	82%	**64	95%
Vihtavuori N540	<<locked>>	81%	32503	66%	**54	95%
[Vihtavuori N550]*	<<locked>>	94%	38247	78%	**51	90%
[Winchester 6.5 StaBALL]*	<<locked>>	90%	33446	68%	**22	90%
Winchester 748	<<locked>>	81%	39900	81%	**01	96%

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