Load data for .450 N.E. 3 1/4'' + .458 | 300gr | Nosler MZ

Recommended Powder(s): Accurate 2495, Hodgdon H322, IMR 3031

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:	.458 \| 300gr \| Nosler MZ
Manufacturer SKU:	50300
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_B4208_C765
Last updated:	2025-01-01

Load data for 0 loads in caliber .450 N.E. 3 1/4'' with .458 | 300gr | Nosler MZ bullet and 0 powders such as Accurate 2495, Hodgdon H322, IMR 3031. 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.

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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>>	89%	39508	89%	**07	93%
[ADI AR 2208]*	<<locked>>	94%	39726	90%	**80	92%
Accurate 2015	<<locked>>	85%	39668	90%	**71	100%
[Accurate 2230]*	<<locked>>	84%	39769	90%	**71	94%
Accurate 2460	<<locked>>	84%	39624	90%	**94	96%
Accurate 2495 👍	<<locked>>	91%	39755	90%	**59	100%
Accurate 2520	<<locked>>	89%	39740	90%	**43	97%
Accurate 4064	<<locked>>	97%	39508	89%	**46	98%
Alliant AR-Comp	<<locked>>	89%	39784	90%	**56	100%
Alliant Reloder- TS 15.5	<<locked>>	96%	39595	90%	**36	95%
[Alliant Reloder-15]*	<<locked>>	93%	39407	89%	**20	92%
[Baschieri & Pellagri 107]*	<<locked>>	90%	39595	90%	**07	91%
Bofors RP3	<<locked>>	97%	39726	90%	**53	95%
Hodgdon BL-C2	<<locked>>	89%	39755	90%	**49	95%
Hodgdon Benchmark	<<locked>>	85%	39349	89%	**41	96%
Hodgdon H322 👍	<<locked>>	86%	39682	90%	**07	99%
[Hodgdon H4895]*	<<locked>>	89%	39682	90%	**23	94%
[Hodgdon VARGET]*	<<locked>>	94%	39726	90%	**80	92%
Hodgdon TrailBoss	<<locked>>	96%	31183	70%	**42	100%
IMR 3031 👍	<<locked>>	93%	39639	90%	**69	99%
[IMR 4064]*	<<locked>>	95%	39639	90%	**80	93%
[IMR 4895]*	<<locked>>	92%	39552	89%	**46	93%
IMR 8208 XBR	<<locked>>	87%	39624	90%	**84	95%
Lovex D073.5	<<locked>>	84%	39624	90%	**94	96%
Lovex D073.6	<<locked>>	91%	39740	90%	**43	97%
[Lovex S060]*	<<locked>>	88%	39653	90%	**35	93%
Lovex S062	<<locked>>	94%	39769	90%	**10	95%
Norma 201	<<locked>>	90%	39740	90%	**90	95%
Norma 202	<<locked>>	90%	39653	90%	**07	98%
[Norma 203B]*	<<locked>>	94%	39711	90%	**36	93%
[Ramshot Big Game]*	<<locked>>	93%	39363	89%	**26	92%
[Ramshot Wild Boar]*	<<locked>>	88%	39566	89%	**13	93%
[Ramshot X-Terminator]*	<<locked>>	84%	39711	90%	**57	93%
ReloadSwiss RS 14	<<locked>>	97%	31357	71%	**88	100%
ReloadSwiss RS 40	<<locked>>	83%	39755	90%	**90	97%
[ReloadSwiss RS 52]*	<<locked>>	92%	39523	89%	**89	92%
ReloadSwiss RS 60	<<locked>>	97%	39334	89%	**85	96%
Rottweil R 901	<<locked>>	87%	39537	89%	**80	97%
Rottweil R 902	<<locked>>	92%	39508	89%	**80	95%
[Rottweil R 903]*	<<locked>>	97%	37347	84%	**94	94%
[SNPE Vectan SP 11]*	<<locked>>	96%	39465	89%	**36	93%
[SNPE Vectan SP 9]*	<<locked>>	90%	39523	89%	**00	93%
SNPE Vectan Tubal 3000	<<locked>>	88%	39755	90%	**31	98%
SNPE Vectan Tubal 5000	<<locked>>	94%	39465	89%	**35	99%
Shooters World Match Rifle	<<locked>>	91%	39740	90%	**43	97%
Shooters World Precision	<<locked>>	94%	39769	90%	**10	95%
Somchem S321	<<locked>>	85%	39610	90%	**03	95%
Somchem S335	<<locked>>	89%	39334	89%	**41	98%
[Somchem S341]*	<<locked>>	89%	39537	89%	**90	93%
[Somchem S355]*	<<locked>>	97%	38667	87%	**97	94%
Vihtavuori N130	<<locked>>	84%	39363	89%	**25	100%
Vihtavuori N133	<<locked>>	91%	39813	90%	**41	99%
Vihtavuori N135	<<locked>>	97%	36767	83%	**57	99%
Vihtavuori N140	<<locked>>	92%	39552	89%	**90	98%
[Vihtavuori N150]*	<<locked>>	97%	32489	73%	**33	93%
Vihtavuori N530	<<locked>>	86%	39682	90%	**97	95%
Vihtavuori N540	<<locked>>	92%	39653	90%	**17	98%
Winchester 748	<<locked>>	86%	39624	90%	**43	96%
[Winchester StaBALL Match]*	<<locked>>	84%	39581	89%	**20	94%

Max Load - Barrel Length: 23.60''

Powder	Charge	FR	MaxP	%	V(0)	z
[ADI AR 2206H]*	<<locked>>	83%	32547	74%	**36	90%
[ADI AR 2208]*	<<locked>>	90%	34954	79%	**72	90%
Accurate 2015	<<locked>>	81%	34200	77%	**59	99%
[Accurate 2230]*	<<locked>>	81%	35665	81%	**85	93%
Accurate 2460	<<locked>>	81%	35302	80%	**92	95%
Accurate 2495	<<locked>>	81%	27441	62%	**64	97%
[Accurate 2520]*	<<locked>>	81%	29254	66%	**87	93%
[Accurate 4064]*	<<locked>>	81%	22902	52%	**06	91%
Alliant AR-Comp	<<locked>>	81%	30110	68%	**33	99%
[Alliant Reloder- TS 15.5]*	<<locked>>	87%	29791	67%	**93	90%
[Alliant Reloder-15]*	<<locked>>	89%	34214	77%	**05	90%
[Baschieri & Pellagri 107]*	<<locked>>	87%	36579	83%	**41	90%
[Bofors RP3]*	<<locked>>	88%	29414	66%	**00	90%
[Hodgdon BL-C2]*	<<locked>>	81%	29689	67%	**00	90%
[Hodgdon Benchmark]*	<<locked>>	81%	34751	79%	**33	94%
Hodgdon H322	<<locked>>	81%	34011	77%	**89	97%
[Hodgdon H4895]*	<<locked>>	82%	30806	70%	**97	90%
[Hodgdon VARGET]*	<<locked>>	90%	34954	79%	**72	90%
Hodgdon TrailBoss	<<locked>>	86%	26498	60%	**40	100%
IMR 3031	<<locked>>	81%	26165	59%	**21	95%
[IMR 4064]*	<<locked>>	91%	34229	77%	**49	90%
[IMR 4895]*	<<locked>>	86%	32271	73%	**69	90%
[IMR 8208 XBR]*	<<locked>>	81%	32314	73%	**13	92%
Lovex D073.5	<<locked>>	81%	35056	79%	**85	95%
[Lovex D073.6]*	<<locked>>	81%	27369	62%	**34	92%
[Lovex S060]*	<<locked>>	81%	32271	73%	**54	90%
[Lovex S062]*	<<locked>>	84%	28297	64%	**25	90%
[Norma 201]*	<<locked>>	81%	29109	66%	**31	90%
[Norma 202]*	<<locked>>	81%	29138	66%	**54	94%
[Norma 203B]*	<<locked>>	88%	32242	73%	**56	90%
[Ramshot Big Game]*	<<locked>>	89%	34214	77%	**08	90%
[Ramshot Wild Boar]*	<<locked>>	83%	32996	75%	**49	90%
[Ramshot X-Terminator]*	<<locked>>	81%	35389	80%	**59	91%
ReloadSwiss RS 14	<<locked>>	83%	25005	57%	**44	100%
ReloadSwiss RS 40	<<locked>>	81%	36463	82%	**15	96%
[ReloadSwiss RS 52]*	<<locked>>	88%	35244	80%	**77	90%
[ReloadSwiss RS 60]*	<<locked>>	89%	30023	68%	**16	90%
Rottweil R 901	<<locked>>	81%	32242	73%	**03	95%
[Rottweil R 902]*	<<locked>>	82%	28718	65%	**11	90%
[Rottweil R 903]*	<<locked>>	91%	30385	69%	**23	90%
[SNPE Vectan SP 11]*	<<locked>>	92%	34200	77%	**12	90%
[SNPE Vectan SP 9]*	<<locked>>	84%	32735	74%	**43	90%
SNPE Vectan Tubal 3000	<<locked>>	81%	31531	71%	**44	95%
[SNPE Vectan Tubal 5000]*	<<locked>>	81%	25338	57%	**83	93%
[Shooters World Match Rifle]*	<<locked>>	81%	27369	62%	**34	92%
[Shooters World Precision]*	<<locked>>	84%	28297	64%	**25	90%
[Somchem S321]*	<<locked>>	81%	34171	77%	**79	93%
Somchem S335	<<locked>>	81%	30690	69%	**38	96%
[Somchem S341]*	<<locked>>	84%	32967	75%	**36	90%
[Somchem S355]*	<<locked>>	90%	30850	70%	**10	90%
Vihtavuori N130	<<locked>>	81%	35476	80%	**39	99%
Vihtavuori N133	<<locked>>	81%	29327	66%	**08	97%
[Vihtavuori N135]*	<<locked>>	81%	21886	49%	**38	92%
[Vihtavuori N140]*	<<locked>>	81%	27340	62%	**85	93%
[Vihtavuori N150]*	<<locked>>	92%	27412	62%	**98	90%
[Vihtavuori N530]*	<<locked>>	81%	33765	76%	**59	93%
[Vihtavuori N540]*	<<locked>>	81%	26818	61%	**85	92%
[Winchester 748]*	<<locked>>	81%	33214	75%	**95	94%
[Winchester StaBALL Match]*	<<locked>>	81%	35520	80%	**31	92%

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