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.
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Cartridge: .338-378 Weatherby Magnum |
|
 Rifle: Weatherby Mark V Accumark |
Max COL: 3.763″ |
| Barrel: 26″ |
Reloading Dies: RCBS, CH4D |
| Max case length: 2.913″ |
Group distance: 100 yards |
| Note: Weatherby Mark V Action rifles only | |
| Bullet Type | Bullet Weight |
Bullet Diameter |
C.O.L. | Net Water Capacity |
Powder Type |
Charge | Primer Type |
Muzzle Velocity |
Muzzle Energy |
Group Size |
| Nosler Ballistic Tip | 200 | .338″ | 3.760″ | 126.4 | Reloder 22 | 112.0 | CCI 250 | 3380 | 5075 | 1.2 |
| Nosler Ballistic Tip | 200 | .338″ | 3.760″ | 126.4 | Reloder 25 | 118.0 | CCI 250 | 3340 | 4955 | 0.7 |
| Nosler Ballistic Tip | 200 | .338″ | 3.760″ | 126.4 | H 1000 | 117.7 | CCI 250 | 3320 | 4896 | 0.7 |
| Nosler Ballistic Tip | 200 | .338″ | 3.760″ | 126.4 | IMR 7828 | 111.5 | CCI 250 | 3350 | 4985 | 0.5 |
| Sierra GameKing BTSP | 215 | .338″ | 3.700″ | 126.6 | Reloder 22 | 110.6 | CCI 250 | 3275 | 5122 | 0.4 |
| Sierra GameKing BTSP | 215 | .338″ | 3.700″ | 126.6 | Reloder 25 | 117.0 | CCI 250 | 3250 | 5044 | 0.5 |
| Sierra GameKing BTSP | 215 | .338″ | 3.700″ | 126.6 | H1000 | 117.3 | CCI 250 | 3260 | 5075 | 0.8 |
| Sierra GameKing BTSP | 215 | .338″ | 3.700″ | 126.6 | IMR 7828 | 110.2 | CCI 250 | 3270 | 5106 | 0.7 |
| Speer Boat Tail 2406 | 225 | .338″ | 3.680″ | 126.1 | Reloder 22 | 108.5 | CCI 250 | 3195 | 5101 | 0.9 |
| Speer Boat Tail 2406 | 225 | .338″ | 3.680″ | 126.1 | Reloder 25 | 115.8 | CCI 250 | 3200 | 5117 | 0.8 |
| Speer Boat Tail 2406 | 225 | .338″ | 3.680″ | 126.1 | H 1000 | 114.5 | CCI 250 | 3150 | 4959 | 1.0 |
| Speer Boat Tail 2406 | 225 | .338″ | 3.680″ | 126.1 | IMR 7828 | 108.7 | CCI 250 | 3200 | 5117 | 0.8 |
| Barnes XLC | 225 | .338″ | 3.760″ | 124.9 | Reloder 22 | 108.5 | CCI 250 | 3220 | 5181 | 1.2 |
| Barnes XLC | 225 | .338″ | 3.760″ | 124.9 | Reloder 25 | 115.0 | CCI 250 | 3190 | 5085 | 1.0 |
| Barnes XLC | 225 | .338″ | 3.760″ | 124.9 | H 1000 | 115.5 | CCI 250 | 3210 | 5149 | 0.8 |
| Barnes XLC | 225 | .338″ | 3.760″ | 124.9 | IMR 7828 | 108.0 | CCI 250 | 3200 | 5117 | 0.5 |
| Barnes XLC | 225 | .338″ | 3.760″ | 124.9 | RS Magnum | 116.0 | CCI 250 | 3240 | 5246 | 0.9 |
| Sierra GameKing BTSP | 250 | .338″ | 3.760″ | 124.6 | Reloder 22 | 104.5 | CCI 250 | 3030 | 5098 | 0.7 |
| Sierra GameKing BTSP | 250 | .338″ | 3.760″ | 124.6 | Reloder 25 | 112.6 | CCI 250 | 3060 | 5199 | 0.7 |
| Sierra GameKing BTSP | 250 | .338″ | 3.760″ | 124.6 | H 1000 | 111.2 | CCI 250 | 3025 | 5081 | 0.7 |
| Sierra GameKing BTSP | 250 | .338″ | 3.760″ | 124.6 | H 870 | 122.0 | CCI 250 | 3080 | 5267 | 1.5 |
| Sierra GameKing BTSP | 250 | .338″ | 3.760″ | 124.6 | IMR 7828 | 104.0 | CCI 250 | 3020 | 5064 | 0.5 |
| Speer Grand Slam | 250 | .338″ | 3.760″ | 126.0 | Reloder 22 | 104.5 | CCI 250 | 3010 | 5031 | 1.1 |
| Speer Grand Slam | 250 | .338″ | 3.760″ | 126.0 | Reloder 25 | 112.6 | CCI 250 | 3040 | 5131 | 1.1 |
| Speer Grand Slam | 250 | .338″ | 3.760″ | 126.0 | H 1000 | 111.8 | CCI 250 | 3020 | 5064 | 1.4 |
| Speer Grand Slam | 250 | .338″ | 3.760″ | 126.0 | H 870 | 124.0 | CCI 250 | 3100 | 5336 | 1.8 |
| Speer Grand Slam | 250 | .338″ | 3.760″ | 126.0 | IMR 7828 | 105.7 | CCI 250 | 3050 | 5165 | 0.9 |
| Speer Grand Slam | 250 | .338″ | 3.760″ | 126.0 | RS Magnum | 117.0 | CCI 250 | 3112 | 5377 | 1.3 |
| Woodleigh Weldcore PP | 250 | .338 | 3.760″ | 127.0 | Reloder 22 | 104.0 | CCI 250 | 2990 | 4964 | 1.5 |
| Woodleigh Weldcore PP | 250 | .338 | 3.760″ | 127.0 | Reloder 25 | 111.5 | CCI 250 | 3000 | 4997 | 1.1 |
| Woodleigh Weldcore PP | 250 | .338 | 3.760″ | 127.0 | H 1000 | 112.3 | CCI 250 | 3010 | 5031 | 0.8 |
| Woodleigh Weldcore PP | 250 | .338 | 3.760″ | 127.0 | H 870 | 122.0 | CCI 250 | 3040 | 5131 | 0.8 |
| Woodleigh Weldcore PP | 250 | .338 | 3.760″ | 127.0 | IMR 7828 | 106.5 | CCI 250 | 3055 | 5182 | 1.0 |
| Swift A Frame | 275 | .338 | 3.760″ | 123.6 | Reloder 22 | 99.5 | CCI 250 | 2845 | 4494 | 0.7 |
| Swift A Frame | 275 | .338 | 3.760″ | 123.6 | Reloder 25 | 108.4 | CCI 250 | 2900 | 5137 | 1.3 |
| Swift A Frame | 275 | .338 | 3.760″ | 123.6 | H 1000 | 107.2 | CCI 250 | 2875 | 5049 | 1.0 |
| Swift A Frame | 275 | .338 | 3.760″ | 123.6 | H 870 | 117.5 | CCI 250 | 2925 | 5226 | 1.4 |
| Swift A Frame | 275 | .338 | 3.760″ | 123.6 | IMR 7828 | 101.0 | CCI 250 | 2900 | 5137 | 0.9 |
