Load Specifications
Load data in caliber .244 H&H Mag. with .243 | 100gr | MEN 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% | 55,550 psi | 88% | 3156 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,648 psi | 82% | 3179 fps | 97% |
| Accurate MAGPRO | <<locked>> | 82% | 54,781 psi | 87% | 3268 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 82% | 56,362 psi | 89% | 3248 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,259 psi | 88% | 3264 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 92% | 55,013 psi | 87% | 3248 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 96% | 55,506 psi | 88% | 3376 fps | 98.6% |
| ADI AR 2225 | <<locked>> | 94% | 54,752 psi | 87% | 3274 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,159 psi | 89% | 3238 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,825 psi | 88% | 3258 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,317 psi | 86% | 3163 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,158 psi | 87% | 3241 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 53,621 psi | 85% | 3278 fps | 97.9% |
| Alliant Reloder-50 | <<locked>> | 96% | 53,882 psi | 85% | 3268 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,579 psi | 88% | 3222 fps | 98.4% |
| Bofors RP15 | <<locked>> | 86% | 55,332 psi | 88% | 3248 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,955 psi | 87% | 3261 fps | 99.9% |
| Bofors RP5 | <<locked>> | 84% | 55,825 psi | 88% | 3258 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 56,304 psi | 89% | 3271 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 53,925 psi | 85% | 3189 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,652 psi | 90% | 3238 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 88% | 54,708 psi | 87% | 3340 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,985 psi | 60% | 2129 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,099 psi | 86% | 3166 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 84% | 53,925 psi | 85% | 3248 fps | 99.7% |
| IMR 8133 Enduron | <<locked>> | 96% | 53,664 psi | 85% | 3251 fps | 99.8% |
| Lovex S071 | <<locked>> | 88% | 54,317 psi | 86% | 3136 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,158 psi | 87% | 3278 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,072 psi | 89% | 3274 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,274 psi | 88% | 3271 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 86% | 53,940 psi | 85% | 3196 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,059 psi | 62% | 2178 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 55,477 psi | 88% | 3317 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,766 psi | 87% | 3284 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 82% | 56,652 psi | 90% | 3215 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 55,956 psi | 89% | 3232 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,519 psi | 85% | 3192 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,593 psi | 88% | 3225 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,144 psi | 89% | 3192 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,275 psi | 89% | 3182 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,840 psi | 89% | 3209 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 82% | 56,014 psi | 89% | 3196 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,347 psi | 88% | 3278 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 88% | 56,927 psi | 90% | 3278 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 90% | 55,100 psi | 87% | 3287 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 92% | 56,681 psi | 90% | 3360 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,274 psi | 88% | 3258 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,101 psi | 89% | 3192 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% | 48,718 psi | 77% | 3038 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 47,776 psi | 76% | 3104 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 80% | 50,966 psi | 81% | 3192 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 80% | 52,605 psi | 83% | 3182 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 48,022 psi | 76% | 3127 fps | 99% |
| ADI AR 2217 | <<locked>> | 80% | 35,868 psi | 57% | 2838 fps | 96.1% |
| ADI AR 2218 | 71.4 gr | 90% | 44,425 psi | 70% | 3130 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 33,286 psi | 53% | 2805 fps | 98.1% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,562 psi | 83% | 3173 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,776 psi | 77% | 3127 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,587 psi | 75% | 3048 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,640 psi | 66% | 2992 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 46,151 psi | 73% | 3120 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 92% | 46,398 psi | 74% | 3114 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,614 psi | 72% | 3022 fps | 96.1% |
| Bofors RP15 | <<locked>> | 80% | 45,382 psi | 72% | 3054 fps | 99.2% |
| Bofors RP30 | <<locked>> | 80% | 39,044 psi | 62% | 2927 fps | 97.2% |
| Bofors RP5 | <<locked>> | 80% | 48,776 psi | 77% | 3127 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 80% | 39,059 psi | 62% | 2923 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 80% | 50,357 psi | 80% | 3120 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,487 psi | 78% | 3104 fps | 98.8% |
| Hodgdon Retumbo | 59.9 gr | 80% | 40,843 psi | 65% | 3051 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,587 psi | 45% | 1909 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,705 psi | 80% | 3104 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 80% | 46,804 psi | 74% | 3107 fps | 98.8% |
| IMR 8133 Enduron | <<locked>> | 84% | 35,563 psi | 56% | 2848 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 41,901 psi | 66% | 2900 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 31,328 psi | 50% | 2743 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 52,388 psi | 83% | 3209 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,543 psi | 75% | 3127 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 80% | 43,076 psi | 68% | 2989 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,399 psi | 47% | 1955 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,538 psi | 64% | 3025 fps | 99.7% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 40,292 psi | 64% | 2976 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 53,011 psi | 84% | 3153 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 52,286 psi | 83% | 3166 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 46,427 psi | 74% | 3051 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,938 psi | 82% | 3163 fps | 99.9% |
| Somchem S385 | <<locked>> | 80% | 52,591 psi | 83% | 3133 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,282 psi | 73% | 3002 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 48,776 psi | 77% | 3071 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 52,373 psi | 83% | 3136 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,721 psi | 82% | 3209 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 80% | 43,323 psi | 69% | 3005 fps | 97.8% |
| Vihtavuori N568 | <<locked>> | 82% | 41,191 psi | 65% | 2992 fps | 95.8% |
| Vihtavuori N570 | 66.8 gr | 86% | 45,498 psi | 72% | 3130 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,485 psi | 75% | 3127 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,718 psi | 77% | 3061 fps | 99.7% |
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 | MEN SP. ADI AR 2218 delivers the highest muzzle velocity at 3,376 fps; across all powders the maximum-charge window runs from 2,129 fps to 3,376 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 1:11.0 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 | MEN 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.