Load Specifications
Load data in caliber .244 H&H Mag. with .243 | 100gr | Sierra Pro-Hunter 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 ReloadSwiss RS 80.
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% | 55,361 psi | 88% | 3153 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,082 psi | 81% | 3169 fps | 96.8% |
| Accurate MAGPRO | <<locked>> | 82% | 54,360 psi | 86% | 3258 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 82% | 56,144 psi | 89% | 3245 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,071 psi | 87% | 3261 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 92% | 54,578 psi | 87% | 3245 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 96% | 55,172 psi | 87% | 3366 fps | 98.5% |
| ADI AR 2225 | <<locked>> | 94% | 54,288 psi | 86% | 3268 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,724 psi | 88% | 3232 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,637 psi | 88% | 3258 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 53,867 psi | 85% | 3156 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,694 psi | 87% | 3235 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 53,229 psi | 84% | 3268 fps | 97.7% |
| Alliant Reloder-50 | <<locked>> | 96% | 53,534 psi | 85% | 3261 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,216 psi | 88% | 3212 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 55,158 psi | 87% | 3248 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,520 psi | 86% | 3251 fps | 99.9% |
| Bofors RP5 | <<locked>> | 84% | 55,637 psi | 88% | 3258 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,912 psi | 89% | 3264 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 53,737 psi | 85% | 3186 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,478 psi | 90% | 3235 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 88% | 54,186 psi | 86% | 3330 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,869 psi | 60% | 2123 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 53,940 psi | 85% | 3163 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 84% | 53,722 psi | 85% | 3241 fps | 99.7% |
| IMR 8133 Enduron | <<locked>> | 96% | 53,243 psi | 84% | 3245 fps | 99.8% |
| Lovex S071 | <<locked>> | 88% | 53,853 psi | 85% | 3130 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,737 psi | 87% | 3271 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,637 psi | 88% | 3264 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,795 psi | 87% | 3264 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 86% | 53,505 psi | 85% | 3186 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,928 psi | 62% | 2175 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 55,013 psi | 87% | 3310 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,346 psi | 86% | 3274 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 82% | 56,188 psi | 89% | 3209 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 82% | 55,477 psi | 88% | 3222 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,939 psi | 84% | 3182 fps | 96.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,100 psi | 87% | 3219 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 55,956 psi | 89% | 3192 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,130 psi | 89% | 3176 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,463 psi | 88% | 3202 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 55,550 psi | 88% | 3189 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,911 psi | 87% | 3268 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 88% | 56,507 psi | 90% | 3268 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 90% | 54,708 psi | 87% | 3281 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 92% | 56,275 psi | 89% | 3353 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,737 psi | 87% | 3248 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,680 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% | 48,283 psi | 77% | 3031 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 47,471 psi | 75% | 3097 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 50,792 psi | 81% | 3189 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 80% | 52,431 psi | 83% | 3179 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 47,819 psi | 76% | 3123 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 80% | 35,708 psi | 57% | 2831 fps | 96% |
| ADI AR 2218 | 71 gr | 90% | 44,106 psi | 70% | 3120 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 32,938 psi | 52% | 2795 fps | 97.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,141 psi | 83% | 3166 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,588 psi | 77% | 3123 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,137 psi | 75% | 3041 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,408 psi | 66% | 2986 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 45,774 psi | 73% | 3114 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 92% | 46,035 psi | 73% | 3104 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,295 psi | 72% | 3015 fps | 96% |
| Bofors RP15 | <<locked>> | 80% | 45,194 psi | 72% | 3051 fps | 99.1% |
| Bofors RP30 | <<locked>> | 80% | 38,638 psi | 61% | 2917 fps | 97.1% |
| Bofors RP5 | <<locked>> | 80% | 48,588 psi | 77% | 3123 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 80% | 38,856 psi | 62% | 2917 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 80% | 50,212 psi | 80% | 3120 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,284 psi | 78% | 3100 fps | 98.7% |
| Hodgdon Retumbo | 59.5 gr | 80% | 40,422 psi | 64% | 3045 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,601 psi | 45% | 1909 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,517 psi | 80% | 3100 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 80% | 46,601 psi | 74% | 3104 fps | 98.8% |
| IMR 8133 Enduron | <<locked>> | 84% | 35,186 psi | 56% | 2838 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 41,669 psi | 66% | 2897 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 30,966 psi | 49% | 2733 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 51,924 psi | 82% | 3202 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,326 psi | 75% | 3123 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 80% | 42,670 psi | 68% | 2979 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,240 psi | 46% | 1949 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,118 psi | 64% | 3018 fps | 99.7% |
| ReloadSwiss RS 80 | 65.8 gr | 82% | 39,900 psi | 63% | 2969 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 52,837 psi | 84% | 3146 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 52,054 psi | 83% | 3159 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 49,400 psi | 78% | 3114 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,706 psi | 82% | 3156 fps | 99.9% |
| Somchem S385 | <<locked>> | 80% | 52,402 psi | 83% | 3127 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,876 psi | 73% | 2992 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 86% | 48,414 psi | 77% | 3064 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 52,127 psi | 83% | 3133 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,314 psi | 81% | 3202 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 80% | 42,931 psi | 68% | 2999 fps | 97.7% |
| Vihtavuori N568 | <<locked>> | 82% | 40,988 psi | 65% | 2992 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 86% | 45,107 psi | 71% | 3120 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,152 psi | 75% | 3123 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,530 psi | 77% | 3058 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 | Sierra Pro-Hunter. 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, ReloadSwiss RS 80 rank at the top here: for .244 H&H Mag. with the .243 | 100gr | Sierra Pro-Hunter 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.