45-70 Government – Marlin 1895 & Win 1886

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Warning: SAAMI standard pressure for the 45-70 Government is 28,000 PSI. All of the listed loads are approximately 40,000 psi. They are not intended for use in original trapdoor single shot rifles or early Marlin Model 1895 or Winchester Model 1886 lever action firearms. Bullet selections are specific, and loads are not valid with substitutions of different bullets of the same weight. Variations in bullet length will alter net case capacity,  pressure and velocity. Primer selection is specific and primer types are not interchangeable. These are maximum loads in my firearms and may be excessive in others. All loads should be reduced by 5% as a starting point for development where cartridges have greater than 40 grains in capacity and 10% for cartridges with less than 40 grain capacity following safe handloading practices as represented in established mainstream reloading manuals. Presentation of these loads does not constitute a solicitation for their use, nor a recommendation.

 

45-70 Gov’t +P Marlin Model 1895 and Win 1886 Only – 40kpsi
Firearm Marlin Model 1895 Guide Gun
Barrel Length 18.5″
Min – Max Case Length 2.105″ +0.0″/-0.020″
Min – Max Cartridge Overall Length 2.490″ – 2.550″
Primer CCI 200 – Large Rifle
Bullet Diameter 0.458″ +0.0″/-0.003″
Reloading Dies Redding Competition

 

Bullet Type  Bullet Weight
Grains
Net H2O
Grains
Capacity
COL” Powder Type Powder Charge
Grains
Muzzle Velocity
fps
Muzzle Energy
ft/lbs
Barnes X FN* 250 59.1 2.550 AA 5744 44.5 2288 2906
Barnes X FN* 250 59.1 2.550 RE 7 52.5 2328 3008
Barnes X FN* 250 59.1 2.550 IMR 4198 51.0 2314 2974
Nosler Partition 300 61.4 2.510 Re 10X 54.0 2239 3340
Nosler Partition 300 61.4 2.510 H335 62.0 2280 3464
Nosler Partition 300 61.4 2.510 IMR 4198 50.0 2108 3247
Hornady FTX* 325 56.5 2.540 Re10 51.0 2156 3355
Hornady FTX* 325 56.5 2.540 H335 57.0 2140 3304
Hornady FTX* 325 56.5 2.540 IMR 4198 47.0 2112 3220
Hornady Interlock 350 60.2 2.545 AA 2200 54.0 2056 3286
Hornady Interlock 350 60.2 2.545 Re 10x 52.0 2043 3243
Hornady Interlock 350 60.2 2.545 IMR 3031 56.0 2011 3144
Hawk Precision 350 59.6 2.525 Re 7 50.0 2032 3209
Hawk Precision 350 59.6 2.525 Re 10x 51.0 2014 3151
Hawk Precision 350 59.6 2.525 IMR 4198 48.0 2011 3143
Hawk Precision 400 55.8 2.525 Re 10x 47.5 1880 3140
Hawk Precision 400 55.8 2.525 AR Comp 52.0 1920 3274
Hawk Precision 400 55.8 2.525 H335 54.0 1902 3213
Cast Performance 460 51.0 2.545 Re 10x 43.0 1719 3018
Cast Performance 460 51.0 2.545 AR Comp 47.0 1754 3143
Cast Performance 460 51.0 2.545 H335 48.0 1710 2987
* Cases Trimmed to 2.040″ to meet overall cartridge length objectives.

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