Load Specifications
Load data in caliber .244 H&H Mag. with .243 | 100gr | Sellier & Bellot SP bullet and 48 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ADI AR 2218 and Vihtavuori N570.
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.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 84% | 55,390 psi | 88% | 3153 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,082 psi | 81% | 3169 fps | 96.8% |
| Accurate MAGPRO | <<locked>> | 82% | 54,404 psi | 86% | 3258 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 82% | 55,927 psi | 89% | 3238 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,853 psi | 87% | 3258 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 92% | 54,360 psi | 86% | 3241 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 96% | 55,216 psi | 88% | 3366 fps | 98.5% |
| ADI AR 2225 | <<locked>> | 94% | 54,099 psi | 86% | 3268 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,753 psi | 88% | 3232 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,477 psi | 88% | 3255 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 53,896 psi | 85% | 3156 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,752 psi | 87% | 3235 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 53,026 psi | 84% | 3264 fps | 97.7% |
| Alliant Reloder-50 | <<locked>> | 96% | 53,316 psi | 85% | 3255 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,245 psi | 88% | 3215 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 54,940 psi | 87% | 3245 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,578 psi | 87% | 3255 fps | 99.9% |
| Bofors RP5 | <<locked>> | 84% | 55,477 psi | 88% | 3255 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,695 psi | 88% | 3261 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 53,548 psi | 85% | 3182 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,289 psi | 89% | 3228 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 88% | 54,259 psi | 86% | 3330 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,884 psi | 60% | 2123 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 53,751 psi | 85% | 3159 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 84% | 53,505 psi | 85% | 3238 fps | 99.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,884 psi | 90% | 3307 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 53,911 psi | 85% | 3130 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,795 psi | 87% | 3271 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,651 psi | 88% | 3268 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,853 psi | 87% | 3264 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 86% | 53,563 psi | 85% | 3189 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,943 psi | 62% | 2172 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 55,085 psi | 87% | 3310 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,114 psi | 86% | 3271 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 82% | 56,260 psi | 89% | 3209 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 82% | 55,521 psi | 88% | 3222 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,011 psi | 84% | 3182 fps | 96.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,172 psi | 87% | 3219 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 55,767 psi | 88% | 3189 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,912 psi | 89% | 3173 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,521 psi | 88% | 3202 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 55,579 psi | 88% | 3189 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,940 psi | 87% | 3271 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 88% | 56,536 psi | 90% | 3271 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 90% | 54,766 psi | 87% | 3281 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 92% | 56,057 psi | 89% | 3346 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,766 psi | 87% | 3248 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,738 psi | 88% | 3186 fps | 100% |
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% | 48,327 psi | 77% | 3031 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 47,500 psi | 75% | 3100 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 50,604 psi | 80% | 3186 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 80% | 52,446 psi | 83% | 3179 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 47,616 psi | 75% | 3117 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 80% | 35,723 psi | 57% | 2835 fps | 96% |
| ADI AR 2218 | 70.9 gr | 90% | 43,932 psi | 70% | 3117 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 32,967 psi | 52% | 2799 fps | 97.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,170 psi | 83% | 3166 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,385 psi | 77% | 3120 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,195 psi | 75% | 3045 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,423 psi | 66% | 2986 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 45,600 psi | 72% | 3110 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 92% | 45,876 psi | 73% | 3104 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,310 psi | 72% | 3015 fps | 96% |
| Bofors RP15 | <<locked>> | 80% | 45,223 psi | 72% | 3054 fps | 99.2% |
| Bofors RP30 | <<locked>> | 80% | 38,667 psi | 61% | 2917 fps | 97.1% |
| Bofors RP5 | <<locked>> | 80% | 48,385 psi | 77% | 3120 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 38,885 psi | 62% | 2917 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 80% | 50,009 psi | 79% | 3114 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,110 psi | 78% | 3097 fps | 98.7% |
| Hodgdon Retumbo | 59.5 gr | 80% | 40,437 psi | 64% | 3045 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,427 psi | 45% | 1903 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,575 psi | 80% | 3100 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 80% | 46,644 psi | 74% | 3104 fps | 98.8% |
| IMR 8133 Enduron | <<locked>> | 84% | 35,186 psi | 56% | 2838 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 41,684 psi | 66% | 2897 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 30,966 psi | 49% | 2733 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 51,967 psi | 82% | 3202 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,355 psi | 75% | 3123 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 80% | 42,699 psi | 68% | 2979 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,254 psi | 46% | 1949 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,161 psi | 64% | 3018 fps | 99.7% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 39,929 psi | 63% | 2969 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 52,852 psi | 84% | 3150 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 51,866 psi | 82% | 3159 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 49,458 psi | 78% | 3114 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,517 psi | 82% | 3153 fps | 99.9% |
| Somchem S385 | <<locked>> | 80% | 52,185 psi | 83% | 3127 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,934 psi | 73% | 2992 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 86% | 48,443 psi | 77% | 3064 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 51,938 psi | 82% | 3127 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,358 psi | 81% | 3202 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 80% | 42,931 psi | 68% | 2999 fps | 97.7% |
| Vihtavuori N568 | <<locked>> | 82% | 40,843 psi | 65% | 2986 fps | 95.7% |
| Vihtavuori N570 | 66.4 gr | 86% | 45,150 psi | 72% | 3123 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,949 psi | 74% | 3120 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,370 psi | 77% | 3054 fps | 99.6% |
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 55 powders for .244 H&H Mag. loaded with the .243 | 100gr | Sellier & Bellot SP. ADI AR 2218 delivers the highest muzzle velocity at 3,366 fps; across all powders the maximum-charge window runs from 2,123 fps to 3,366 fps. Accurate 8700 gives the best case fill at 100 %, and 55 of the 55 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.243" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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, ADI AR 2218, Vihtavuori N570 rank at the top here: for .244 H&H Mag. with the .243 | 100gr | Sellier & Bellot SP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon US 869, Lovex D100, Ramshot LRT burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.