Load data for .257 Roberts + .257 | 115gr | Barnes X S

Recommended Powder(s): Alliant Reloder-16, Hodgdon Hybrid 100V, ReloadSwiss RS 62, Somchem S365, Vihtavuori N555

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.257 \| 115gr \| Barnes X S
Manufacturer SKU:	25722
Bullet Weight:	115gr \| 7.5g
Bullet Diameter:	0.257" \| 6.53mm
Bullet Length:	1.200" \| 30.5mm
Caliber:	.257 Roberts load data
Case Length (l3):	2.233" \| 56.7mm
Cartridge Length (C.O.L.):	2.733" \| 69.4mm
Seated Depth:	0.700" \| 17.8mm
Shank Seated Depth:	0.700" \| 17.8mm
Case Capacity:	56.0 Grains of Water \| 3.64 cm³
Primer Size:	Large Rifle (LR)
Max. allowed Pressure:	51488 psi \| 3550 bar
LID:	LID_B500_C241
Last updated:	2025-01-01

Load data for 112 loads in caliber .257 Roberts with .257 | 115gr | Barnes X S bullet and 56 powders such as Alliant Reloder-16, Hodgdon Hybrid 100V, ReloadSwiss RS 62, Somchem S365, Vihtavuori N555. 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".

Go to the bottom of the "My Account " page to set the measure system (imperial vs. metric)
No data yet
C.O.L. (Inch)
C.O.L. (mm)
Case Length (Inch)
Case Length (mm)
CaseCapacity (GoW)
Min z (%)
Min FR (%)
Max FR*
Barrel Length (Inch)
Barrel Length (cm)
Safety Buffer (%)
.
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 2209]*	<<locked>>	95%	45803	89%	**30	93%
Accurate 2700	<<locked>>	84%	45934	89%	**15	95%
Accurate 3100	<<locked>>	97%	42917	83%	**71	96%
Accurate 4350	<<locked>>	89%	45252	88%	**33	98%
Alliant Reloder-16 👍	<<locked>>	91%	45876	89%	**82	99%
Alliant Reloder-17	<<locked>>	87%	45585	89%	**99	100%
[Alliant Reloder-19]*	<<locked>>	95%	45223	88%	**36	94%
[Alliant Reloder-22]*	<<locked>>	97%	42438	82%	**13	93%
Alliant Reloder-23	<<locked>>	96%	40074	78%	**87	99%
[Alliant Reloder-25]*	<<locked>>	97%	36056	70%	**85	94%
Alliant Reloder-26	<<locked>>	96%	44164	86%	**35	98%
Hodgdon H414	<<locked>>	85%	45382	88%	**40	96%
Hodgdon H4350	<<locked>>	92%	46137	90%	**94	95%
Hodgdon Hybrid 100V 👍	<<locked>>	93%	45542	88%	**20	100%
Hodgdon LVR	<<locked>>	88%	45643	89%	**36	98%
Hodgdon Superperformance	<<locked>>	88%	45165	88%	**56	95%
Hodgdon VARGET	<<locked>>	83%	46296	90%	**74	99%
Hodgdon TrailBoss	<<locked>>	95%	34330	67%	**09	100%
IMR 4064	<<locked>>	83%	46224	90%	**67	99%
IMR 4166 Enduron	<<locked>>	84%	46325	90%	**41	96%
IMR 4350	<<locked>>	90%	46209	90%	**90	95%
IMR 4451 Enduron	<<locked>>	85%	46166	90%	**71	96%
IMR 4831	<<locked>>	94%	45977	89%	**30	99%
[IMR 4955 Enduron]*	<<locked>>	97%	46180	90%	**77	91%
Lovex S065	<<locked>>	87%	45963	89%	**67	97%
Lovex S070	<<locked>>	88%	45847	89%	**84	96%
[Lovex S071]*	<<locked>>	97%	36622	71%	**39	94%
[Norma 204]*	<<locked>>	90%	45600	89%	**13	93%
Norma MRP	<<locked>>	97%	44396	86%	**99	95%
Norma URP	<<locked>>	90%	46253	90%	**59	98%
Ramshot Hunter	<<locked>>	91%	45629	89%	**49	97%
[Ramshot Magnum]*	<<locked>>	97%	41365	80%	**51	92%
ReloadSwiss RS 14	<<locked>>	96%	35085	68%	**52	100%
ReloadSwiss RS 60	<<locked>>	87%	45426	88%	**15	100%
ReloadSwiss RS 62 👍	<<locked>>	90%	45687	89%	**72	98%
ReloadSwiss RS 70	<<locked>>	90%	45614	89%	**89	98%
Rottweil R 903	<<locked>>	84%	46079	89%	**94	100%
[Rottweil R 904]*	<<locked>>	94%	46325	90%	**90	92%
[Rottweil R 905]*	<<locked>>	96%	45905	89%	**56	94%
Rottweil R 907	<<locked>>	86%	45890	89%	**57	95%
SNPE Vectan SP 11	<<locked>>	84%	46137	90%	**36	99%
SNPE Vectan Tubal 5000	<<locked>>	83%	46166	90%	**85	100%
SNPE Vectan Tubal 7000	<<locked>>	87%	46151	90%	**25	96%
Shooters World Long Rifle	<<locked>>	87%	45963	89%	**67	97%
Somchem S355	<<locked>>	83%	45527	88%	**77	99%
Somchem S365 👍	<<locked>>	93%	45672	89%	**85	100%
Somchem S385	<<locked>>	95%	45585	89%	**17	95%
Vihtavuori N135	<<locked>>	85%	46209	90%	**31	100%
Vihtavuori N150	<<locked>>	89%	45672	89%	**51	100%
Vihtavuori N160	<<locked>>	87%	45687	89%	**00	98%
[Vihtavuori N165]*	<<locked>>	97%	40437	79%	**95	93%
Vihtavuori N550	<<locked>>	87%	45513	88%	**36	98%
Vihtavuori N555 👍	<<locked>>	97%	45150	88%	**85	99%
Winchester 6.5 StaBALL	<<locked>>	89%	45629	89%	**90	100%
Winchester 760	<<locked>>	85%	45382	88%	**40	96%
Winchester StaBALL HD	<<locked>>	97%	36985	72%	**10	99%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AR 2209]*	<<locked>>	88%	37826	73%	**59	90%
[Accurate 2700]*	<<locked>>	81%	42453	82%	**43	94%
[Accurate 3100]*	<<locked>>	83%	28790	56%	**33	90%
Accurate 4350	<<locked>>	81%	35621	69%	**30	96%
Alliant Reloder-16	<<locked>>	81%	34708	67%	**20	95%
Alliant Reloder-17	<<locked>>	81%	38754	75%	**54	99%
[Alliant Reloder-19]*	<<locked>>	88%	37072	72%	**49	90%
[Alliant Reloder-22]*	<<locked>>	92%	37550	73%	**05	90%
[Alliant Reloder-23]*	<<locked>>	81%	26426	51%	**97	93%
[Alliant Reloder-25]*	<<locked>>	91%	30966	60%	**34	90%
[Alliant Reloder-26]*	<<locked>>	82%	28297	55%	**02	90%
[Hodgdon H414]*	<<locked>>	81%	39914	78%	**25	94%
[Hodgdon H4350]*	<<locked>>	81%	34084	66%	**18	90%
Hodgdon Hybrid 100V	<<locked>>	81%	32300	63%	**28	97%
Hodgdon LVR	<<locked>>	81%	37594	73%	**69	96%
[Hodgdon Superperformance]*	<<locked>>	81%	35998	70%	**43	91%
Hodgdon VARGET	<<locked>>	81%	43424	84%	**21	98%
Hodgdon TrailBoss	<<locked>>	89%	31372	61%	**54	100%
IMR 4064	<<locked>>	81%	43163	84%	**08	99%
IMR 4166 Enduron	<<locked>>	81%	42743	83%	**69	95%
[IMR 4350]*	<<locked>>	81%	35230	68%	**54	91%
[IMR 4451 Enduron]*	<<locked>>	81%	40814	79%	**66	94%
[IMR 4831]*	<<locked>>	81%	31169	61%	**02	94%
[IMR 4955 Enduron]*	<<locked>>	94%	42540	83%	**05	90%
Lovex S065	<<locked>>	81%	39204	76%	**26	95%
[Lovex S070]*	<<locked>>	81%	37217	72%	**03	93%
[Lovex S071]*	<<locked>>	88%	28790	56%	**36	90%
[Norma 204]*	<<locked>>	84%	37681	73%	**46	90%
[Norma MRP]*	<<locked>>	88%	34011	66%	**39	90%
Norma URP	<<locked>>	81%	35041	68%	**13	95%
[Ramshot Hunter]*	<<locked>>	81%	34127	66%	**90	93%
[Ramshot Magnum]*	<<locked>>	94%	37014	72%	**49	90%
ReloadSwiss RS 14	<<locked>>	85%	30211	59%	**57	100%
ReloadSwiss RS 60	<<locked>>	81%	37652	73%	**41	99%
ReloadSwiss RS 62	<<locked>>	81%	34447	67%	**30	95%
[ReloadSwiss RS 70]*	<<locked>>	81%	34229	66%	**20	94%
Rottweil R 903	<<locked>>	81%	42163	82%	**21	99%
[Rottweil R 904]*	<<locked>>	90%	40872	79%	**82	90%
[Rottweil R 905]*	<<locked>>	88%	36332	71%	**36	90%
[Rottweil R 907]*	<<locked>>	81%	39784	77%	**33	93%
SNPE Vectan SP 11	<<locked>>	81%	42279	82%	**61	99%
SNPE Vectan Tubal 5000	<<locked>>	81%	43468	84%	**39	100%
[SNPE Vectan Tubal 7000]*	<<locked>>	81%	38043	74%	**61	93%
Shooters World Long Rifle	<<locked>>	81%	39204	76%	**26	95%
Somchem S355	<<locked>>	81%	42670	83%	**25	99%
Somchem S365	<<locked>>	81%	31792	62%	**74	98%
[Somchem S385]*	<<locked>>	84%	33417	65%	**44	90%
Vihtavuori N135	<<locked>>	81%	41423	80%	**49	100%
Vihtavuori N150	<<locked>>	81%	36767	71%	**77	99%
Vihtavuori N160	<<locked>>	81%	37521	73%	**36	96%
[Vihtavuori N165]*	<<locked>>	92%	35128	68%	**67	90%
Vihtavuori N550	<<locked>>	81%	38421	75%	**95	96%
[Vihtavuori N555]*	<<locked>>	81%	28181	55%	**72	93%
Winchester 6.5 StaBALL	<<locked>>	81%	35969	70%	**90	98%
[Winchester 760]*	<<locked>>	81%	39914	78%	**25	94%
[Winchester StaBALL HD]*	<<locked>>	82%	24685	48%	**80	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.