44-40 Winchester

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Warning: 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.

44-40 Winchester – MAP 11,000 PSI
Firearm Winchester 1873
Barrel Length 24.00″
Max Case Length 1.305″ +0.000″/-0.020″
Min – Max COL 1.540″ – 1.592″
Primer CCI 300 (LP)
Bullet Diameter 0.4270″ +0.000″/-0.0030″
Reloading Dies Lee Precision

 

Bullet Type Bullet
Weight

Grains
Net H2O
Grains
Capacity
COL” Powder Type Powder
Charge

Grains
Muzzle
Velocity

fps
Muzzle
Energy

ft/lbs
Hunter’s Supply  Cast FP
160 31.4 1.575 2400 17.5 1328 627
Hunter’s Supply Cast FP 160 31.4 1.575 IMR 4227 21.5 1302 602
Sierra Sportmaster JHP
180 29.6 1.591 2400 16.0 1233 608
Sierra Sportmaster JHP
180 29.6 1.591 IMR 4227 20.0 1256 631
Hunter’s Supply Cast FP 200 29.2 1.580 2400 15.5 1151 588
Hunter’s Supply Cast FP 200 29.2 1.580 IMR 4227 18.0 1147 584
Hunters Supply Cast FP 240 25.4 1.580 2400 12.5 1063 602
Hunters Supply Cast FP 240 25.4 1.580 IMR 4227 16.0 1072 613
All cases trimmed to 1.285″. Cast bullets sized to 0.4275″, jacketed to 0.4285″. Winchester 1873’s groove diameter 0.4285″
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