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Load data for .45-70 Govt. CIP + .458 | 400gr | Speer FN

Recommended Powder(s): none

.45-70 Govt. CIP + .458 | 400gr | Speer FN

Load Specifications

(Use the Personalized Load Calculator below to adjust )

Bullet:
.458 | 400gr | Speer FN
Manufacturer SKU:
2479
Bullet Weight:
400gr | 25.9g
Bullet Diameter:
0.458" | 11.63mm
Bullet Length:
0.972" | 24.7mm
Caliber:
.45-70 Govt. CIP load data
Case Length (l3):
2.105" | 53.5mm
Cartridge Length (C.O.L.):
2.512" | 63.8mm
Seated Depth:
0.565" | 14.4mm
Shank Seated Depth:
0.565" | 14.4mm
Case Capacity:
79.0 Grains of Water | 5.13 cm³
Primer Size:
Large Rifle (LR)
Max. allowed Pressure:
31908 psi | 2200 bar
LID:
LID_B6299_C749
Last updated:
2025-02-02

Load data for 14 loads in caliber .45-70 Govt. CIP with .458 | 400gr | Speer FN bullet and 7 powders such as none. 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".

  • Muzzle velocity vs. barrel length

    Every 1 inch additional barrel length increases muzzle velocity by approx. 15.6 fps

  • We recommend you limit powder range to relevant brands to speed up re-calculation of results

    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.

    .

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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
Accurate 2015
<<locked>>
90%
28239
89%
**52
95%
[Accurate 2495]*
<<locked>>
97%
25425
80%
**88
94%
Alliant AR-Comp
<<locked>>
94%
28514
89%
**88
97%
Alliant Reloder-10x
<<locked>>
87%
28529
89%
**65
96%
[Somchem S335]*
<<locked>>
93%
28384
89%
**16
91%
Vihtavuori N130
<<locked>>
87%
28297
89%
**09
95%
[Vihtavuori N133]*
<<locked>>
94%
28631
90%
**13
94%

Max Load - Barrel Length: 23.60''

Powder
Charge
FR
MaxP
%
V(0)
z
[Accurate 2015]*
<<locked>>
84%
23090
72%
**40
92%
[Accurate 2495]*
<<locked>>
90%
20566
64%
**63
90%
[Alliant AR-Comp]*
<<locked>>
85%
22568
71%
**40
93%
[Alliant Reloder-10x]*
<<locked>>
81%
24047
75%
**63
94%
[Somchem S335]*
<<locked>>
90%
25759
81%
**67
90%
[Vihtavuori N130]*
<<locked>>
84%
25121
79%
**47
94%
[Vihtavuori N133]*
<<locked>>
90%
25744
81%
**50
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

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