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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 easily be excessive in others. All loads should be reduced by 10%,  and developed following safe handloading practices as represented in established reloading manuals produced by component manufacturers. Presentation of these loads does not constitute a solicitation for their use, nor a recommendation.
 

Cartridge: .375 Ruger

  Rifle: Ruger Hawkeye African   Max COL: 3.340″
  Barrel: 23″   Reloading Dies: Hornady
  Max case length: 2.580″   Group distance: 100 yards
 Note:  Some loads are slightly longer or shorter than spec, but gauge and ops checked in firearm prior to use. GS Custom bullets are of a unique design. The related load data, under no circumstances, can be used with  other manufacturers’ bullets of same of similar weight.

Bullet Type Bullet
Weight
Bullet
Diameter
C.O.L. Net Water
Capacity
Powder
Type
Charge Primer
Type
Muzzle
Velocity
Muzzle
Energy
Group
Size
Hornady SPFB 3706 225 .375″ 3.330″ 89.9 Reloder 15 82.0 CCI 250 3141 4930 1.1
Hornady SPFB 3706 225 .375″ 3.330″ 89.9 IMR 4895 80.0 CCI 250 3206 5136 1.1
Hornady SPFB 3706 225 .375″ 3.330″ 89.9 IMR 3031 76.6 CCI 250 3195 5101 1.0
Speer SPFB 2471 235 .375″ 3.255″ 90.2 Reloder 15 81.0 CCI 250 3126 5100 1.3
Speer SPFB 2471 235 .375″ 3.255″ 90.2 IMR 4895 79.5 CCI 250 3195 5328 0.6
Speer SPFB 2471 235 .375″ 3.255″ 90.2 IMR 3031 75.5 CCI 250 3122 5087 1.0
Speer SPFB 2471 235 .375″ 3.255″ 90.2 Win 748 80.0 CCI 250 3136 5133 1.1
Barnes TSXFB 37552 235 .375″ 3.400″ 88.4 Reloder 15 80.5 CCI 250 3141 5149 1.2
Barnes TSXFB 37552 235 .375″ 3.400″ 88.4 Win 748 79.0 CCI 250 3177 5268 1.2
Barnes TSXFB 37552 235 .375″ 3.400″ 88.4 IMR 4895 78.5 CCI 250 3144 5159 0.8
Barnes TSXFB 37552 235 .375″ 3.400″ 88.4 Varget 80.0 CCI 250 3093 4993 0.9
Nosler SPBT 54413 260 .375″ 3.340″ 83.8 Reloder 15 75.0 CCI 250 2830 4625 0.5
Nosler SPBT 54413 260 .375″ 3.340″ 83.8 Varget 74.5 CCI 250 2903 4857 1.0
Nosler SPBT 54413 260 .375″ 3.340″ 83.8 IMR 4895 74.0 CCI 250 2955 5042 1.0
Nosler SPBT 54413 260 .375″ 3.340″ 83.8 Win 748 74.5 CCI 250 2950 5025 1.3
GS Custom HVBT 2657 265 .375″ 3.400″ 85.0 Reloder 15 78.0 CCI 250 2999 5294 0.8
GS Custom HVBT 2657 265 .375″ 3.400″ 85.0 BL-C(2) 78.0 CCI 250 3011 5336 1.2
GS Custom HVBT 2657 265 .375″ 3.400″ 85.0 Varget 79.0 CCI 250 3018 5361 1.0
GS Custom HVBT 2657 265 .375″ 3.400″ 85.0 IMR 4895 77.5 CCI 250 3054 5490 0.9
Sierra SPBT 3000 300 .375 3.400″ 86.4 Reloder 15 74.0 CCI 250 2779 5146 1.3
Sierra SPBT 3000 300 .375 3.400″ 86.4 Reloder 19 85.0 CCI 250 2810 5261 0.8
Sierra SPBT 3000 300 .375 3.400″ 86.4 Varget 73.5 CCI 250 2699 4854 0.9
Sierra SPBT 3000 300 .375 3.400″ 86.4 IMR 4350 80.0 CCI 250 2698 4850 1.3
Sierra SPBT 3000 300 .375 3.400″ 86.4 IMR 4895 72.0 CCI 250 2797 5213 1.0
Sierra SPBT 3000 300 .375 3.400″ 86.4 IMR 3031 68.5 CCI 250 2651 4683 1.7
Woodleigh PPFB W46C 350 .375″ 3.340″ 76.7 Reloder 15 69.0 CCI 250 2457 4693 1.0
Woodleigh PPFB W46C 350 .375″ 3.340″ 76.7 Reloder 19 80.0 CCI 250 2481 4785 0.7
Woodleigh PPFB W46C 350 .375″ 3.340″ 76.7 IMR 4350 74.5 CCI 250 2436 4613 1.3
Woodleigh PPFB W46C 350 .375″ 3.340″ 76.7 IMR 4895 67.5 CCI 250 2419 4549 1.1