Load Specifications
Load data in caliber .338-378 Weath. Mag. with .338 | 200gr | Reichenberg HDB Universal bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Winchester StaBALL HD.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 54,230 psi | 85% | 3054 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,201 psi | 87% | 3094 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 57,101 psi | 89% | 3219 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 90% | 56,434 psi | 88% | 3156 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 54,259 psi | 85% | 3159 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,330 psi | 82% | 3117 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,833 psi | 73% | 3071 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,478 psi | 89% | 3153 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 57,551 psi | 90% | 3163 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,840 psi | 88% | 3143 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,375 psi | 85% | 3153 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,796 psi | 87% | 3123 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,434 psi | 87% | 3186 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,449 psi | 88% | 3215 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,014 psi | 88% | 3120 fps | 96.9% |
| Bofors RP15 | <<locked>> | 96% | 57,261 psi | 90% | 3199 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,201 psi | 87% | 3192 fps | 99.4% |
| Bofors RP5 | <<locked>> | 92% | 54,375 psi | 85% | 3153 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 57,159 psi | 90% | 3094 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 54,012 psi | 85% | 3146 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 84% | 56,956 psi | 89% | 3150 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 55,782 psi | 87% | 3107 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 90% | 54,099 psi | 85% | 3097 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,681 psi | 89% | 3136 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 56,608 psi | 89% | 3068 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 54,389 psi | 85% | 3271 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 53,722 psi | 84% | 3123 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,144 psi | 58% | 1995 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,550 psi | 87% | 3077 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,201 psi | 87% | 3064 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 55,550 psi | 87% | 3081 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,984 psi | 86% | 3077 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 94% | 56,173 psi | 88% | 3199 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,250 psi | 66% | 2963 fps | 96.8% |
| Lovex S065 | <<locked>> | 84% | 55,753 psi | 87% | 3058 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 57,667 psi | 90% | 3110 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,579 psi | 87% | 3077 fps | 100% |
| Norma 204 | <<locked>> | 86% | 56,840 psi | 89% | 3140 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 42,424 psi | 66% | 2989 fps | 98.9% |
| Norma MRP | <<locked>> | 90% | 54,346 psi | 85% | 3176 fps | 100% |
| Norma URP | <<locked>> | 86% | 57,377 psi | 90% | 3130 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 57,159 psi | 90% | 3222 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 56,463 psi | 88% | 3140 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 55,550 psi | 87% | 3146 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,884 psi | 59% | 2037 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,361 psi | 87% | 3114 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 53,882 psi | 84% | 3143 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,230 psi | 87% | 3258 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 3209 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 90% | 57,421 psi | 90% | 3123 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 90% | 55,303 psi | 87% | 3130 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 84% | 57,159 psi | 90% | 3094 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,753 psi | 87% | 3058 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 57,667 psi | 90% | 3110 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,027 psi | 86% | 3009 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,882 psi | 86% | 3127 fps | 99.6% |
| Somchem S361 | <<locked>> | 88% | 55,288 psi | 87% | 3051 fps | 98.5% |
| Somchem S365 | <<locked>> | 86% | 54,317 psi | 85% | 3074 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,840 psi | 88% | 3100 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 55,898 psi | 88% | 2999 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,463 psi | 87% | 3068 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,593 psi | 87% | 3077 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 84% | 54,636 psi | 86% | 3071 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 54,114 psi | 85% | 3097 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,099 psi | 85% | 3169 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 96% | 54,215 psi | 85% | 3150 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 55,303 psi | 87% | 3215 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,085 psi | 86% | 3015 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,145 psi | 90% | 3153 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 54,346 psi | 85% | 3209 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,883 psi | 88% | 3097 fps | 99.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 35,592 psi | 56% | 2697 fps | 97.9% |
| Accurate 4350 | <<locked>> | 80% | 47,877 psi | 75% | 2972 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 42,627 psi | 67% | 2943 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 39,972 psi | 63% | 2841 fps | 96.8% |
| ADI AR 2213 | <<locked>> | 84% | 40,944 psi | 64% | 2890 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 92% | 39,624 psi | 62% | 2854 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 88% | 31,125 psi | 49% | 2674 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,093 psi | 72% | 2982 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 53,635 psi | 84% | 3107 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,001 psi | 63% | 2835 fps | 96.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,752 psi | 56% | 2766 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,418 psi | 54% | 2730 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,762 psi | 47% | 2628 fps | 96.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,189 psi | 60% | 2877 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 49,211 psi | 77% | 2992 fps | 95.1% |
| Bofors RP15 | <<locked>> | 82% | 35,621 psi | 56% | 2759 fps | 95.2% |
| Bofors RP30 | <<locked>> | 90% | 38,696 psi | 61% | 2864 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 35,752 psi | 56% | 2766 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 50,343 psi | 79% | 2979 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 37,797 psi | 59% | 2812 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 49,676 psi | 78% | 3028 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 52,156 psi | 82% | 3045 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 40,843 psi | 64% | 2835 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,975 psi | 67% | 2881 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,323 psi | 68% | 2854 fps | 100% |
| Hodgdon Retumbo | 100.7 gr | 86% | 35,708 psi | 56% | 2848 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 49,777 psi | 78% | 3054 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,731 psi | 43% | 1785 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,788 psi | 72% | 2904 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,808 psi | 81% | 3005 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 45,513 psi | 71% | 2913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 42,409 psi | 66% | 2835 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 84% | 39,465 psi | 62% | 2867 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 98% | 39,363 psi | 62% | 2897 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 49,182 psi | 77% | 2949 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,529 psi | 74% | 2940 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 30,429 psi | 48% | 2559 fps | 96% |
| Norma 204 | <<locked>> | 80% | 46,021 psi | 72% | 2946 fps | 98.1% |
| Norma 217 | <<locked>> | 92% | 31,923 psi | 50% | 2723 fps | 95% |
| Norma MRP | <<locked>> | 80% | 37,550 psi | 59% | 2841 fps | 97.5% |
| Norma URP | <<locked>> | 80% | 46,978 psi | 74% | 2959 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,189 psi | 61% | 2874 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 45,876 psi | 72% | 2956 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 84% | 34,911 psi | 55% | 2740 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,326 psi | 44% | 1827 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,167 psi | 75% | 2995 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,499 psi | 73% | 3015 fps | 100% |
| ReloadSwiss RS 76 | 105.3 gr | 84% | 32,532 psi | 51% | 2749 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 42,902 psi | 67% | 2986 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 41,249 psi | 65% | 2822 fps | 96% |
| Rottweil R 905 | <<locked>> | 80% | 39,276 psi | 62% | 2818 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 80% | 50,343 psi | 79% | 2979 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,182 psi | 77% | 2949 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,529 psi | 74% | 2940 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,153 psi | 75% | 2894 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,957 psi | 61% | 2812 fps | 96.6% |
| Somchem S361 | <<locked>> | 80% | 42,047 psi | 66% | 2805 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 44,106 psi | 69% | 2910 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,784 psi | 62% | 2799 fps | 97.7% |
| Vihtavuori N150 | <<locked>> | 80% | 52,330 psi | 82% | 2946 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,428 psi | 76% | 2953 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,476 psi | 54% | 2661 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 47,732 psi | 75% | 2956 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,537 psi | 60% | 2812 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 82% | 40,611 psi | 64% | 2900 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 88% | 40,872 psi | 64% | 2887 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 94% | 44,251 psi | 69% | 3002 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,805 psi | 75% | 2907 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,821 psi | 78% | 3031 fps | 99.7% |
| Winchester StaBALL HD | 96.2 gr | 80% | 30,676 psi | 48% | 2746 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,390 psi | 57% | 2717 fps | 95.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 71 powders for .338-378 Weath. Mag. loaded with the .338 | 200gr | Reichenberg HDB Universal. Hodgdon Retumbo delivers the highest muzzle velocity at 3,271 fps; across all powders the maximum-charge window runs from 1,995 fps to 3,271 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.338" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for .338-378 Weath. Mag. with the .338 | 200gr | Reichenberg HDB Universal they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.