Load data for .450 N.E. 3 1/4'' + .458 | 300gr | H&N KS CuH

Recommended Powder(s):

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.458 \| 300gr \| H&N KS CuH
Bullet Weight:	300gr \| 19.4g
Bullet Diameter:	0.458" \| 11.63mm
Bullet Length:	<<locked>>
Caliber:	.450 N.E. 3 1/4'' load data
Case Length (l3):	3.250" \| 82.5mm
Cartridge Length (C.O.L.):	<<locked>>
Seated Depth:	<<locked>>
Shank Seated Depth:	<<locked>>
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_B7550_C765
Last updated:	2026-01-30

Load data for 114 loads in caliber .450 N.E. 3 1/4'' with .458 | 300gr | H&N KS CuH bullet and 57 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>>	88%	39726	90%	**43	94%
[ADI AR 2208]*	<<locked>>	93%	39784	90%	**17	93%
Accurate 2015	<<locked>>	84%	39537	89%	**97	100%
[Accurate 2200]*	<<locked>>	85%	39682	90%	**90	92%
Accurate 2495 👍	<<locked>>	89%	39523	89%	**76	100%
Accurate 2520	<<locked>>	88%	39755	90%	**69	98%
Accurate 4064 👍	<<locked>>	95%	39726	90%	**85	99%
Alliant AR-Comp	<<locked>>	87%	39465	89%	**76	100%
Alliant Reloder- TS 15.5	<<locked>>	94%	39639	90%	**66	95%
[Alliant Reloder-15]*	<<locked>>	91%	39392	89%	**49	93%
[Alliant Reloder-17]*	<<locked>>	97%	38450	87%	**82	93%
[Baschieri & Pellagri 107]*	<<locked>>	88%	39566	89%	**46	92%
Bofors RP3	<<locked>>	95%	39479	89%	**79	95%
Hodgdon BL-C2	<<locked>>	87%	39755	90%	**76	96%
Hodgdon Benchmark	<<locked>>	84%	39813	90%	**80	96%
[Hodgdon CFE223]*	<<locked>>	92%	39508	89%	**72	92%
Hodgdon H322	<<locked>>	84%	39508	89%	**43	99%
Hodgdon H4895	<<locked>>	87%	39494	89%	**53	95%
[Hodgdon VARGET]*	<<locked>>	93%	39784	90%	**17	93%
Hodgdon TrailBoss	<<locked>>	97%	31589	71%	**81	100%
IMR 3031 👍	<<locked>>	92%	39668	90%	**95	99%
[IMR 4064]*	<<locked>>	94%	39755	90%	**13	93%
[IMR 4895]*	<<locked>>	91%	39697	90%	**76	94%
IMR 8208 XBR	<<locked>>	86%	39552	89%	**10	95%
Lovex D073.6	<<locked>>	89%	39537	89%	**69	98%
[Lovex S060]*	<<locked>>	87%	39784	90%	**74	94%
Lovex S062	<<locked>>	92%	39682	90%	**36	96%
Norma 201	<<locked>>	89%	39552	89%	**23	96%
Norma 202	<<locked>>	88%	39537	89%	**43	98%
[Norma 203B]*	<<locked>>	92%	39624	90%	**66	94%
[Ramshot Big Game]*	<<locked>>	92%	39407	89%	**69	93%
[Ramshot Wild Boar]*	<<locked>>	87%	39726	90%	**46	94%
ReloadSwiss RS 14	<<locked>>	97%	31299	71%	**18	100%
[ReloadSwiss RS 52]*	<<locked>>	90%	39436	89%	**22	93%
ReloadSwiss RS 60	<<locked>>	96%	39566	89%	**35	97%
Rottweil R 901	<<locked>>	86%	39769	90%	**17	98%
Rottweil R 902	<<locked>>	91%	39813	90%	**20	96%
Rottweil R 903	<<locked>>	97%	39479	89%	**62	95%
[SNPE Vectan SP 11]*	<<locked>>	95%	39595	90%	**82	94%
[SNPE Vectan SP 9]*	<<locked>>	89%	39552	89%	**36	94%
SNPE Vectan Tubal 3000	<<locked>>	87%	39726	90%	**64	98%
SNPE Vectan Tubal 5000	<<locked>>	93%	39566	89%	**67	99%
Shooters World Match Rifle	<<locked>>	89%	39537	89%	**69	98%
Shooters World Precision	<<locked>>	92%	39682	90%	**36	96%
Somchem S321	<<locked>>	84%	39755	90%	**46	96%
Somchem S335	<<locked>>	87%	39581	89%	**77	99%
[Somchem S341]*	<<locked>>	87%	39494	89%	**23	94%
Somchem S355	<<locked>>	96%	39624	90%	**56	95%
Vihtavuori N130	<<locked>>	83%	39668	90%	**61	100%
Vihtavuori N133	<<locked>>	89%	39552	89%	**67	100%
Vihtavuori N135	<<locked>>	97%	38667	87%	**26	99%
Vihtavuori N140	<<locked>>	90%	39537	89%	**20	98%
[Vihtavuori N150]*	<<locked>>	97%	34374	78%	**12	94%
Vihtavuori N530	<<locked>>	84%	39552	89%	**26	96%
Vihtavuori N540	<<locked>>	91%	39523	89%	**40	98%
[Winchester 6.5 StaBALL]*	<<locked>>	97%	36709	83%	**38	93%
Winchester 748	<<locked>>	84%	39508	89%	**69	97%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AR 2206H]*	<<locked>>	81%	31459	71%	**39	90%
[ADI AR 2208]*	<<locked>>	87%	33489	76%	**66	90%
Accurate 2015	<<locked>>	81%	35679	81%	**21	99%
[Accurate 2200]*	<<locked>>	83%	36013	81%	**02	90%
Accurate 2495	<<locked>>	81%	28732	65%	**20	97%
[Accurate 2520]*	<<locked>>	81%	30777	70%	**56	94%
[Accurate 4064]*	<<locked>>	81%	23888	54%	**69	92%
Alliant AR-Comp	<<locked>>	81%	31662	72%	**05	100%
[Alliant Reloder- TS 15.5]*	<<locked>>	85%	28790	65%	**90	90%
[Alliant Reloder-15]*	<<locked>>	86%	32619	74%	**92	90%
[Alliant Reloder-17]*	<<locked>>	93%	33127	75%	**41	90%
[Baschieri & Pellagri 107]*	<<locked>>	84%	34853	79%	**35	90%
[Bofors RP3]*	<<locked>>	86%	28311	64%	**93	90%
[Hodgdon BL-C2]*	<<locked>>	81%	31444	71%	**79	92%
Hodgdon Benchmark	<<locked>>	81%	36230	82%	**98	95%
[Hodgdon CFE223]*	<<locked>>	89%	35694	81%	**84	90%
Hodgdon H322	<<locked>>	81%	35592	80%	**51	98%
[Hodgdon H4895]*	<<locked>>	81%	31647	72%	**59	91%
[Hodgdon VARGET]*	<<locked>>	88%	33489	76%	**66	90%
Hodgdon TrailBoss	<<locked>>	83%	25425	57%	**47	100%
IMR 3031	<<locked>>	81%	27267	62%	**90	96%
[IMR 4064]*	<<locked>>	87%	32358	73%	**39	90%
[IMR 4895]*	<<locked>>	84%	30734	69%	**56	90%
[IMR 8208 XBR]*	<<locked>>	81%	33692	76%	**75	93%
[Lovex D073.6]*	<<locked>>	81%	28616	65%	**97	93%
[Lovex S060]*	<<locked>>	81%	33127	75%	**16	91%
[Lovex S062]*	<<locked>>	82%	27514	62%	**25	90%
[Norma 201]*	<<locked>>	81%	30327	69%	**93	92%
Norma 202	<<locked>>	81%	30574	69%	**30	95%
[Norma 203B]*	<<locked>>	85%	31154	70%	**52	90%
[Ramshot Big Game]*	<<locked>>	86%	32663	74%	**95	90%
[Ramshot Wild Boar]*	<<locked>>	81%	32401	73%	**75	91%
ReloadSwiss RS 14	<<locked>>	81%	24294	55%	**57	100%
[ReloadSwiss RS 52]*	<<locked>>	86%	33547	76%	**74	90%
[ReloadSwiss RS 60]*	<<locked>>	86%	28529	64%	**16	90%
Rottweil R 901	<<locked>>	81%	33301	75%	**62	96%
[Rottweil R 902]*	<<locked>>	81%	28674	65%	**41	91%
[Rottweil R 903]*	<<locked>>	89%	29095	66%	**10	90%
[SNPE Vectan SP 11]*	<<locked>>	89%	32547	74%	**02	90%
[SNPE Vectan SP 9]*	<<locked>>	82%	31270	71%	**26	90%
SNPE Vectan Tubal 3000	<<locked>>	81%	32793	74%	**03	96%
[SNPE Vectan Tubal 5000]*	<<locked>>	81%	26281	59%	**46	94%
[Shooters World Match Rifle]*	<<locked>>	81%	28616	65%	**97	93%
[Shooters World Precision]*	<<locked>>	82%	27514	62%	**25	90%
Somchem S321	<<locked>>	81%	35752	81%	**51	95%
Somchem S335	<<locked>>	81%	32039	72%	**07	97%
[Somchem S341]*	<<locked>>	81%	31691	72%	**36	90%
[Somchem S355]*	<<locked>>	88%	29907	68%	**13	90%
Vihtavuori N130	<<locked>>	81%	36869	83%	**02	100%
Vihtavuori N133	<<locked>>	81%	30560	69%	**67	98%
[Vihtavuori N135]*	<<locked>>	81%	22713	51%	**00	94%
Vihtavuori N140	<<locked>>	81%	28456	64%	**51	95%
[Vihtavuori N150]*	<<locked>>	89%	26571	60%	**05	90%
[Vihtavuori N530]*	<<locked>>	81%	35404	80%	**38	94%
[Vihtavuori N540]*	<<locked>>	81%	28021	63%	**57	94%
[Winchester 6.5 StaBALL]*	<<locked>>	93%	32300	73%	**20	90%
Winchester 748	<<locked>>	81%	34925	79%	**67	95%

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