Load data for .25 WSSM + .257 | 100gr | Osprey Virtus

Recommended Powder(s): Alliant Reloder-15, IMR 4895, Ramshot Big Game, ReloadSwiss RS 52, SNPE Vectan SP 11

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.257 \| 100gr \| Osprey Virtus
Manufacturer SKU:	Osprey-0.257-100
Bullet Weight:	100gr \| 6.5g
Bullet Diameter:	0.257" \| 6.53mm
Bullet Length:	1.100" \| 27.9mm
Caliber:	.25 WSSM load data
Case Length (l3):	1.670" \| 42.4mm
Cartridge Length (C.O.L.):	2.325" \| 59.0mm
Seated Depth:	0.445" \| 11.3mm
Shank Seated Depth:	0.406" \| 10.3mm
Case Capacity:	54.3 Grains of Water \| 3.53 cm³
Primer Size:	Large Rifle (LR)
Max. allowed Pressure:	63817 psi \| 4400 bar
LID:	LID_B10748_C206
Last updated:	2025-01-01
Recommended Twist Rate:	1:10 - 1:9

Load data for 194 loads in caliber .25 WSSM with .257 | 100gr | Osprey Virtus bullet and 97 powders such as Alliant Reloder-15, IMR 4895, Ramshot Big Game, ReloadSwiss RS 52, SNPE Vectan SP 11. 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 2206H	<<locked>>	90%	56797	89%	**17	100%
ADI AR 2208	<<locked>>	95%	56579	89%	**87	99%
Accurate 2015	<<locked>>	87%	57174	90%	**09	100%
Accurate 2200	<<locked>>	88%	57058	89%	**77	99%
Accurate 2230	<<locked>>	84%	56724	89%	**61	100%
Accurate 2460	<<locked>>	84%	56362	88%	**51	100%
Accurate 2495	<<locked>>	90%	57000	89%	**77	100%
Accurate 2520	<<locked>>	88%	56115	88%	**87	100%
Accurate 2700	<<locked>>	96%	57392	90%	**28	96%
Accurate 4064	<<locked>>	95%	57029	89%	**04	100%
Accurate 4350	<<locked>>	96%	44614	70%	**66	97%
Alliant AR-Comp	<<locked>>	88%	56333	88%	**48	100%
Alliant Reloder- TS 15.5	<<locked>>	96%	56753	89%	**27	100%
Alliant Reloder-10x	<<locked>>	84%	56666	89%	**18	100%
Alliant Reloder-15 👍	<<locked>>	94%	57130	90%	**36	99%
Alliant Reloder-16	<<locked>>	96%	44599	70%	**82	97%
Alliant Reloder-17	<<locked>>	97%	52083	82%	**53	100%
[Alliant Reloder-23]*	<<locked>>	97%	31589	50%	**77	94%
[Alliant Reloder-26]*	<<locked>>	97%	34882	55%	**08	92%
Baschieri & Pellagri 107	<<locked>>	90%	56231	88%	**17	99%
Hodgdon BL-C2	<<locked>>	89%	57232	90%	**36	100%
Hodgdon Benchmark	<<locked>>	87%	56550	89%	**28	100%
Hodgdon CFE223	<<locked>>	94%	57217	90%	**69	99%
Hodgdon H322	<<locked>>	87%	57000	89%	**71	100%
Hodgdon H380	<<locked>>	95%	56550	89%	**20	99%
Hodgdon H414	<<locked>>	97%	53867	84%	**20	96%
[Hodgdon H4350]*	<<locked>>	97%	43671	68%	**64	93%
Hodgdon Hybrid 100V	<<locked>>	97%	41133	64%	**64	98%
Hodgdon LVR	<<locked>>	96%	49153	77%	**31	97%
[Hodgdon Superperformance]*	<<locked>>	97%	49458	77%	**51	94%
Hodgdon VARGET	<<locked>>	96%	57101	89%	**04	99%
Hodgdon TrailBoss	<<locked>>	95%	32692	51%	**44	100%
IMR 3031	<<locked>>	93%	57261	90%	**14	100%
IMR 4064	<<locked>>	96%	56782	89%	**87	99%
IMR 4166 Enduron	<<locked>>	96%	56405	88%	**48	97%
IMR 4198	<<locked>>	84%	57116	90%	**79	100%
[IMR 4350]*	<<locked>>	97%	46456	73%	**13	94%
IMR 4451 Enduron	<<locked>>	96%	54128	85%	**41	96%
IMR 4831	<<locked>>	97%	38856	61%	**22	95%
IMR 4895 👍	<<locked>>	93%	57348	90%	**59	100%
IMR 8208 XBR	<<locked>>	89%	57043	89%	**84	100%
Lovex D073.4	<<locked>>	83%	57319	90%	**54	100%
Lovex D073.5	<<locked>>	84%	56362	88%	**51	100%
Lovex D073.6	<<locked>>	90%	56869	89%	**00	100%
Lovex S060	<<locked>>	90%	56797	89%	**45	100%
Lovex S062	<<locked>>	94%	57290	90%	**00	100%
Lovex S065	<<locked>>	97%	50198	79%	**79	97%
Lovex S070	<<locked>>	96%	47007	74%	**33	95%
Norma 201	<<locked>>	91%	56855	89%	**81	100%
Norma 202	<<locked>>	91%	57363	90%	**81	100%
Norma 203B	<<locked>>	94%	56275	88%	**27	100%
[Norma 204]*	<<locked>>	97%	46760	73%	**49	92%
Norma URP	<<locked>>	96%	44672	70%	**59	97%
Ramshot Big Game 👍	<<locked>>	93%	56782	89%	**50	100%
Ramshot Hunter	<<locked>>	97%	44904	70%	**59	95%
Ramshot TAC	<<locked>>	88%	56492	89%	**74	98%
Ramshot Wild Boar	<<locked>>	89%	57305	90%	**23	100%
Ramshot X-Terminator	<<locked>>	86%	57087	89%	**64	100%
ReloadSwiss RS 14	<<locked>>	95%	33098	52%	**90	100%
ReloadSwiss RS 40	<<locked>>	85%	57174	90%	**74	100%
ReloadSwiss RS 50	<<locked>>	94%	56521	89%	**84	97%
ReloadSwiss RS 52 👍	<<locked>>	94%	57276	90%	**66	100%
ReloadSwiss RS 60	<<locked>>	97%	50734	79%	**43	100%
ReloadSwiss RS 62	<<locked>>	97%	45324	71%	**99	97%
ReloadSwiss RS 70	<<locked>>	97%	45716	72%	**09	96%
Rottweil R 901	<<locked>>	88%	56289	88%	**41	100%
Rottweil R 902	<<locked>>	93%	57319	90%	**77	100%
Rottweil R 903	<<locked>>	96%	54346	85%	**84	100%
Rottweil R 907	<<locked>>	96%	51967	81%	**99	95%
SNPE Vectan SP 11 👍	<<locked>>	96%	56405	88%	**46	100%
SNPE Vectan SP 7	<<locked>>	89%	57217	90%	**87	99%
SNPE Vectan SP 9	<<locked>>	91%	56666	89%	**07	100%
SNPE Vectan Tubal 3000	<<locked>>	90%	56898	89%	**99	100%
SNPE Vectan Tubal 5000	<<locked>>	96%	56449	88%	**86	100%
SNPE Vectan Tubal 7000	<<locked>>	97%	50792	80%	**36	96%
Shooters World Long Rifle	<<locked>>	97%	50198	79%	**79	97%
Shooters World Match Rifle	<<locked>>	90%	56869	89%	**00	100%
Shooters World Precision	<<locked>>	94%	57290	90%	**00	100%
Somchem S321	<<locked>>	86%	57000	89%	**00	100%
Somchem S335	<<locked>>	90%	56710	89%	**02	100%
Somchem S341	<<locked>>	89%	56173	88%	**77	100%
Somchem S355	<<locked>>	97%	55579	87%	**97	100%
Somchem S365	<<locked>>	97%	40451	63%	**23	99%
Vihtavuori N130	<<locked>>	87%	56971	89%	**66	100%
Vihtavuori N133	<<locked>>	92%	56985	89%	**89	100%
Vihtavuori N135	<<locked>>	96%	52475	82%	**86	100%
Vihtavuori N140	<<locked>>	93%	57116	89%	**48	100%
Vihtavuori N150	<<locked>>	97%	47326	74%	**27	100%
Vihtavuori N160	<<locked>>	96%	49719	78%	**12	98%
Vihtavuori N530	<<locked>>	87%	56420	88%	**87	100%
Vihtavuori N540	<<locked>>	93%	57392	90%	**91	100%
Vihtavuori N550	<<locked>>	97%	50227	79%	**61	98%
[Vihtavuori N555]*	<<locked>>	96%	33228	52%	**49	94%
Winchester 6.5 StaBALL	<<locked>>	97%	48950	77%	**69	99%
Winchester 748	<<locked>>	86%	56695	89%	**23	100%
Winchester 760	<<locked>>	97%	53867	84%	**20	96%
Winchester StaBALL Match	<<locked>>	84%	56826	89%	**14	100%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
ADI AR 2206H	<<locked>>	81%	42424	66%	**54	98%
ADI AR 2208	<<locked>>	81%	35940	56%	**87	95%
Accurate 2015	<<locked>>	81%	47500	74%	**61	100%
Accurate 2200	<<locked>>	81%	44396	70%	**54	97%
Accurate 2230	<<locked>>	81%	50459	79%	**59	99%
Accurate 2460	<<locked>>	81%	50299	79%	**63	100%
Accurate 2495	<<locked>>	81%	42583	67%	**54	100%
Accurate 2520	<<locked>>	81%	43511	68%	**81	100%
[Accurate 2700]*	<<locked>>	84%	38348	60%	**74	90%
Accurate 4064	<<locked>>	81%	35824	56%	**20	99%
[Accurate 4350]*	<<locked>>	83%	27746	43%	**49	90%
Alliant AR-Comp	<<locked>>	81%	44048	69%	**67	100%
Alliant Reloder- TS 15.5	<<locked>>	81%	35128	55%	**00	97%
Alliant Reloder-10x	<<locked>>	81%	51576	81%	**43	100%
Alliant Reloder-15	<<locked>>	81%	37956	59%	**76	96%
[Alliant Reloder-16]*	<<locked>>	84%	29820	47%	**89	90%
[Alliant Reloder-17]*	<<locked>>	81%	30269	47%	**35	93%
[Alliant Reloder-23]*	<<locked>>	91%	26484	42%	**03	90%
[Alliant Reloder-26]*	<<locked>>	94%	31894	50%	**20	90%
Baschieri & Pellagri 107	<<locked>>	81%	41249	65%	**41	96%
Hodgdon BL-C2	<<locked>>	81%	43569	68%	**00	99%
Hodgdon Benchmark	<<locked>>	81%	46325	73%	**64	100%
[Hodgdon CFE223]*	<<locked>>	81%	36347	57%	**62	94%
Hodgdon H322	<<locked>>	81%	47326	74%	**23	100%
[Hodgdon H380]*	<<locked>>	81%	35621	56%	**07	93%
[Hodgdon H414]*	<<locked>>	85%	35737	56%	**43	90%
[Hodgdon H4350]*	<<locked>>	92%	38232	60%	**40	90%
[Hodgdon Hybrid 100V]*	<<locked>>	82%	25237	40%	**25	90%
[Hodgdon LVR]*	<<locked>>	82%	30298	47%	**92	90%
[Hodgdon Superperformance]*	<<locked>>	90%	38566	60%	**15	90%
Hodgdon VARGET	<<locked>>	81%	35665	56%	**80	95%
Hodgdon TrailBoss	<<locked>>	81%	26237	41%	**99	100%
IMR 3031	<<locked>>	81%	38029	60%	**92	100%
IMR 4064	<<locked>>	81%	35215	55%	**64	95%
[IMR 4166 Enduron]*	<<locked>>	81%	35360	55%	**21	90%
IMR 4198	<<locked>>	81%	52156	82%	**07	100%
[IMR 4350]*	<<locked>>	90%	37144	58%	**17	90%
[IMR 4451 Enduron]*	<<locked>>	83%	35636	56%	**57	90%
[IMR 4831]*	<<locked>>	87%	27833	44%	**30	90%
IMR 4895	<<locked>>	81%	38914	61%	**08	97%
IMR 8208 XBR	<<locked>>	81%	44643	70%	**67	99%
Lovex D073.4	<<locked>>	81%	52272	82%	**86	100%
Lovex D073.5	<<locked>>	81%	50299	79%	**63	100%
Lovex D073.6	<<locked>>	81%	40973	64%	**31	100%
Lovex S060	<<locked>>	81%	42612	67%	**92	98%
Lovex S062	<<locked>>	81%	37188	58%	**23	98%
[Lovex S065]*	<<locked>>	82%	31343	49%	**56	90%
[Lovex S070]*	<<locked>>	87%	35012	55%	**74	90%
Norma 201	<<locked>>	81%	41336	65%	**05	99%
Norma 202	<<locked>>	81%	41568	65%	**18	100%
Norma 203B	<<locked>>	81%	37333	59%	**62	96%
[Norma 204]*	<<locked>>	94%	42728	67%	**74	90%
[Norma URP]*	<<locked>>	83%	28732	45%	**52	90%
Ramshot Big Game	<<locked>>	81%	36724	58%	**66	96%
[Ramshot Hunter]*	<<locked>>	88%	33591	53%	**90	90%
Ramshot TAC	<<locked>>	81%	44541	70%	**61	96%
Ramshot Wild Boar	<<locked>>	81%	43859	69%	**87	98%
Ramshot X-Terminator	<<locked>>	81%	47950	75%	**10	99%
ReloadSwiss RS 14	<<locked>>	81%	26716	42%	**45	100%
ReloadSwiss RS 40	<<locked>>	81%	49893	78%	**66	100%
[ReloadSwiss RS 50]*	<<locked>>	81%	36201	57%	**80	91%
ReloadSwiss RS 52	<<locked>>	81%	35621	56%	**59	98%
[ReloadSwiss RS 60]*	<<locked>>	81%	29501	46%	**18	94%
[ReloadSwiss RS 62]*	<<locked>>	85%	29892	47%	**21	90%
[ReloadSwiss RS 70]*	<<locked>>	88%	33373	52%	**03	91%
Rottweil R 901	<<locked>>	81%	45078	71%	**58	100%
Rottweil R 902	<<locked>>	81%	39102	61%	**46	98%
Rottweil R 903	<<locked>>	81%	32213	50%	**28	95%
[Rottweil R 907]*	<<locked>>	87%	37797	59%	**07	90%
SNPE Vectan SP 11	<<locked>>	81%	33417	52%	**80	95%
SNPE Vectan SP 7	<<locked>>	81%	42409	66%	**31	96%
SNPE Vectan SP 9	<<locked>>	81%	40770	64%	**12	97%
SNPE Vectan Tubal 3000	<<locked>>	81%	43076	68%	**72	100%
SNPE Vectan Tubal 5000	<<locked>>	81%	35462	56%	**15	100%
[SNPE Vectan Tubal 7000]*	<<locked>>	86%	34505	54%	**05	90%
[Shooters World Long Rifle]*	<<locked>>	82%	31343	49%	**56	90%
Shooters World Match Rifle	<<locked>>	81%	40973	64%	**31	100%
Shooters World Precision	<<locked>>	81%	37188	58%	**23	98%
Somchem S321	<<locked>>	81%	47790	75%	**43	100%
Somchem S335	<<locked>>	81%	42598	67%	**72	100%
Somchem S341	<<locked>>	81%	41959	66%	**22	97%
Somchem S355	<<locked>>	81%	33504	53%	**51	96%
[Somchem S365]*	<<locked>>	81%	23743	37%	**18	91%
Vihtavuori N130	<<locked>>	81%	47543	74%	**28	100%
Vihtavuori N133	<<locked>>	81%	40408	63%	**20	100%
Vihtavuori N135	<<locked>>	81%	32416	51%	**08	100%
Vihtavuori N140	<<locked>>	81%	38711	61%	**40	100%
Vihtavuori N150	<<locked>>	81%	28195	44%	**90	95%
[Vihtavuori N160]*	<<locked>>	81%	29182	46%	**33	90%
Vihtavuori N530	<<locked>>	81%	46818	73%	**23	99%
Vihtavuori N540	<<locked>>	81%	38261	60%	**46	99%
[Vihtavuori N550]*	<<locked>>	81%	29501	46%	**82	91%
[Vihtavuori N555]*	<<locked>>	90%	27035	42%	**56	90%
[Winchester 6.5 StaBALL]*	<<locked>>	81%	28282	44%	**80	92%
Winchester 748	<<locked>>	81%	47137	74%	**66	100%
[Winchester 760]*	<<locked>>	85%	35737	56%	**43	90%
Winchester StaBALL Match	<<locked>>	81%	50691	79%	**22	99%

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.