Load data for .450 N.E. 3 1/4'' + .458 | 300gr | Winchester JHP 45-70

Recommended Powder(s): Accurate 2495, IMR 3031, Vihtavuori N135

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.458 \| 300gr \| Winchester JHP 45-70
Bullet Weight:	300gr \| 19.4g
Bullet Diameter:	0.458" \| 11.63mm
Bullet Length:	1.000" \| 25.4mm
Caliber:	.450 N.E. 3 1/4'' load data
Case Length (l3):	3.250" \| 82.5mm
Cartridge Length (C.O.L.):	3.891" \| 98.8mm
Seated Depth:	0.359" \| 9.1mm
Shank Seated Depth:	0.359" \| 9.1mm
Case Capacity:	136.0 Grains of Water \| 8.83 cm³
Primer Size:	Large Rifle Magnum (LRM)
Max. allowed Pressure:	44237 psi \| 3050 bar
LID:	LID_B6660_C765
Last updated:	2025-01-01

Load data for 104 loads in caliber .450 N.E. 3 1/4'' with .458 | 300gr | Winchester JHP 45-70 bullet and 52 powders such as Accurate 2495, IMR 3031, Vihtavuori N135. 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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Min z (%)
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Max FR*
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Barrel Length (cm)
Safety Buffer (%)
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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>>	87%	39784	90%	**00	93%
[ADI AR 2208]*	<<locked>>	92%	39639	90%	**67	92%
Accurate 2015	<<locked>>	83%	39726	90%	**51	100%
Accurate 2495 👍	<<locked>>	88%	39682	90%	**33	100%
Accurate 2520	<<locked>>	87%	39624	90%	**23	97%
Accurate 4064	<<locked>>	94%	39813	90%	**43	98%
Alliant AR-Comp	<<locked>>	87%	39711	90%	**40	100%
Alliant Reloder- TS 15.5	<<locked>>	94%	39465	89%	**23	95%
[Alliant Reloder-15]*	<<locked>>	91%	39784	90%	**13	92%
[Alliant Reloder-17]*	<<locked>>	97%	38798	88%	**36	92%
[Baschieri & Pellagri 107]*	<<locked>>	88%	39668	90%	**97	91%
Hodgdon BL-C2	<<locked>>	87%	39436	89%	**26	95%
Hodgdon Benchmark	<<locked>>	83%	39494	89%	**28	96%
Hodgdon H322	<<locked>>	84%	39798	90%	**94	98%
[Hodgdon VARGET]*	<<locked>>	93%	39639	90%	**67	92%
Hodgdon TrailBoss	<<locked>>	96%	31908	72%	**45	100%
IMR 3031 👍	<<locked>>	91%	39639	90%	**59	99%
[IMR 4064]*	<<locked>>	94%	39813	90%	**71	93%
[IMR 4895]*	<<locked>>	90%	39697	90%	**30	93%
IMR 8208 XBR	<<locked>>	85%	39740	90%	**74	95%
Lovex D073.6	<<locked>>	89%	39624	90%	**23	97%
[Lovex S060]*	<<locked>>	86%	39682	90%	**21	93%
Lovex S062	<<locked>>	92%	39465	89%	**80	95%
Norma 201	<<locked>>	88%	39682	90%	**74	95%
Norma 202	<<locked>>	88%	39523	89%	**94	98%
[Norma 203B]*	<<locked>>	92%	39755	90%	**17	93%
[Ramshot Big Game]*	<<locked>>	92%	39755	90%	**26	93%
[Ramshot Wild Boar]*	<<locked>>	86%	39479	89%	**94	93%
ReloadSwiss RS 14	<<locked>>	96%	31894	72%	**85	100%
ReloadSwiss RS 52	<<locked>>	93%	39711	90%	**66	96%
[ReloadSwiss RS 60]*	<<locked>>	97%	37782	85%	**17	92%
Rottweil R 901	<<locked>>	85%	39784	90%	**61	97%
Rottweil R 902	<<locked>>	90%	39479	89%	**57	95%
[Rottweil R 903]*	<<locked>>	97%	39552	89%	**26	94%
[SNPE Vectan SP 11]*	<<locked>>	95%	39711	90%	**30	93%
[SNPE Vectan SP 9]*	<<locked>>	89%	39769	90%	**94	93%
SNPE Vectan Tubal 3000	<<locked>>	86%	39813	90%	**15	98%
SNPE Vectan Tubal 5000	<<locked>>	93%	39784	90%	**28	99%
Shooters World Match Rifle	<<locked>>	89%	39624	90%	**23	97%
Shooters World Precision	<<locked>>	92%	39465	89%	**80	95%
Somchem S321	<<locked>>	83%	39450	89%	**87	95%
Somchem S335	<<locked>>	87%	39436	89%	**28	98%
[Somchem S341]*	<<locked>>	87%	39595	90%	**77	93%
[Somchem S355]*	<<locked>>	95%	39624	90%	**03	94%
Vihtavuori N133	<<locked>>	89%	39537	89%	**25	99%
Vihtavuori N135 👍	<<locked>>	97%	39450	89%	**00	99%
Vihtavuori N140	<<locked>>	90%	39610	90%	**74	98%
[Vihtavuori N150]*	<<locked>>	97%	35012	79%	**85	94%
Vihtavuori N530	<<locked>>	84%	39479	89%	**80	95%
Vihtavuori N540	<<locked>>	91%	39798	90%	**00	98%
[Winchester 6.5 StaBALL]*	<<locked>>	97%	37043	84%	**92	92%
Winchester 748	<<locked>>	84%	39595	89%	**33	96%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AR 2206H]*	<<locked>>	81%	32503	73%	**20	90%
[ADI AR 2208]*	<<locked>>	88%	34896	79%	**56	90%
Accurate 2015	<<locked>>	81%	36927	83%	**98	99%
Accurate 2495	<<locked>>	81%	31024	70%	**33	98%
[Accurate 2520]*	<<locked>>	81%	31908	72%	**39	94%
[Accurate 4064]*	<<locked>>	81%	26121	59%	**88	93%
Alliant AR-Comp	<<locked>>	81%	32445	73%	**79	100%
[Alliant Reloder- TS 15.5]*	<<locked>>	85%	30052	68%	**77	90%
[Alliant Reloder-15]*	<<locked>>	87%	34679	78%	**95	90%
[Alliant Reloder-17]*	<<locked>>	94%	35230	80%	**44	90%
[Baschieri & Pellagri 107]*	<<locked>>	86%	36753	83%	**28	90%
[Hodgdon BL-C2]*	<<locked>>	81%	32227	73%	**52	92%
Hodgdon Benchmark	<<locked>>	81%	37043	84%	**69	95%
Hodgdon H322	<<locked>>	81%	36216	82%	**25	98%
[Hodgdon VARGET]*	<<locked>>	88%	34896	79%	**56	90%
Hodgdon TrailBoss	<<locked>>	86%	27209	62%	**44	100%
IMR 3031	<<locked>>	81%	28558	65%	**77	96%
[IMR 4064]*	<<locked>>	89%	34461	78%	**39	90%
[IMR 4895]*	<<locked>>	84%	32343	73%	**49	90%
[IMR 8208 XBR]*	<<locked>>	81%	34432	78%	**49	93%
[Lovex D073.6]*	<<locked>>	81%	30052	68%	**90	93%
[Lovex S060]*	<<locked>>	81%	33953	77%	**80	91%
[Lovex S062]*	<<locked>>	81%	28747	65%	**11	90%
[Norma 201]*	<<locked>>	81%	31778	72%	**84	92%
Norma 202	<<locked>>	81%	31691	72%	**10	95%
[Norma 203B]*	<<locked>>	86%	32503	73%	**49	90%
[Ramshot Big Game]*	<<locked>>	87%	34664	78%	**98	90%
[Ramshot Wild Boar]*	<<locked>>	81%	33214	75%	**43	90%
ReloadSwiss RS 14	<<locked>>	82%	25614	58%	**44	100%
[ReloadSwiss RS 52]*	<<locked>>	83%	28674	65%	**67	90%
[ReloadSwiss RS 60]*	<<locked>>	94%	34301	78%	**15	90%
Rottweil R 901	<<locked>>	81%	35259	80%	**59	96%
[Rottweil R 902]*	<<locked>>	81%	30327	69%	**34	91%
[Rottweil R 903]*	<<locked>>	88%	30255	68%	**00	90%
[SNPE Vectan SP 11]*	<<locked>>	90%	34142	77%	**95	90%
[SNPE Vectan SP 9]*	<<locked>>	83%	32938	74%	**26	90%
SNPE Vectan Tubal 3000	<<locked>>	81%	33968	77%	**80	96%
[SNPE Vectan Tubal 5000]*	<<locked>>	81%	27383	62%	**29	94%
[Shooters World Match Rifle]*	<<locked>>	81%	30052	68%	**90	93%
[Shooters World Precision]*	<<locked>>	81%	28747	65%	**11	90%
[Somchem S321]*	<<locked>>	81%	36564	83%	**18	94%
Somchem S335	<<locked>>	81%	33127	75%	**84	97%
[Somchem S341]*	<<locked>>	82%	33330	75%	**30	90%
[Somchem S355]*	<<locked>>	88%	31024	70%	**00	90%
Vihtavuori N133	<<locked>>	81%	31357	71%	**44	98%
[Vihtavuori N135]*	<<locked>>	81%	24221	55%	**03	94%
[Vihtavuori N140]*	<<locked>>	81%	29356	66%	**28	94%
[Vihtavuori N150]*	<<locked>>	89%	27644	63%	**82	90%
[Vihtavuori N530]*	<<locked>>	81%	36071	82%	**98	94%
[Vihtavuori N540]*	<<locked>>	81%	29153	66%	**44	94%
[Winchester 6.5 StaBALL]*	<<locked>>	94%	34200	77%	**23	90%
[Winchester 748]*	<<locked>>	81%	35230	80%	**28	94%

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.