Load Specifications
Load data in caliber .244 H&H Mag. with .243 | 95gr | ShellHouse Castings SP Hard Cast bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Hodgdon H1000 and Vihtavuori N568.
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>> | 88% | 55,593 psi | 88% | 3160 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,014 psi | 89% | 3356 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 84% | 53,737 psi | 85% | 3198 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 88% | 56,231 psi | 89% | 3276 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 96% | 54,795 psi | 87% | 3241 fps | 99.4% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,463 psi | 89% | 3351 fps | 97% |
| ADI AR 2225 | <<locked>> | 98% | 53,838 psi | 85% | 3259 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,913 psi | 90% | 3250 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,434 psi | 89% | 3266 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 54,273 psi | 86% | 3171 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,911 psi | 87% | 3246 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,752 psi | 87% | 3250 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,985 psi | 90% | 3231 fps | 97.4% |
| Bofors RP15 | <<locked>> | 90% | 55,608 psi | 88% | 3330 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 54,549 psi | 86% | 3248 fps | 99.3% |
| Bofors RP5 | <<locked>> | 88% | 56,434 psi | 89% | 3343 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 56,492 psi | 90% | 3346 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 55,027 psi | 87% | 3201 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 53,954 psi | 86% | 3182 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 53,824 psi | 85% | 3114 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 54,027 psi | 86% | 3409 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,522 psi | 61% | 2120 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,999 psi | 89% | 3255 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 54,433 psi | 86% | 3149 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,463 psi | 88% | 3258 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 86% | 54,273 psi | 86% | 3248 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,563 psi | 85% | 3222 fps | 99% |
| Lovex S071 | <<locked>> | 92% | 53,722 psi | 85% | 3129 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 54,041 psi | 86% | 3250 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,405 psi | 89% | 3281 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,302 psi | 86% | 3253 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 88% | 55,825 psi | 88% | 3223 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,493 psi | 61% | 2165 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,868 psi | 87% | 3308 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 54,201 psi | 86% | 3261 fps | 98.3% |
| Rottweil R 904 | <<locked>> | 84% | 54,346 psi | 86% | 3170 fps | 99% |
| Rottweil R 905 | <<locked>> | 86% | 56,695 psi | 90% | 3243 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,318 psi | 89% | 3310 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 55,593 psi | 88% | 3156 fps | 98.8% |
| Somchem S365 | <<locked>> | 82% | 55,796 psi | 88% | 3175 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,782 psi | 90% | 3206 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,739 psi | 90% | 3108 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,158 psi | 87% | 3162 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 86% | 55,637 psi | 88% | 3198 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,710 psi | 90% | 3298 fps | 99% |
| Vihtavuori N565 | <<locked>> | 92% | 56,623 psi | 90% | 3263 fps | 99.1% |
| Vihtavuori N568 | <<locked>> | 94% | 54,520 psi | 86% | 3265 fps | 97.9% |
| Vihtavuori N570 | <<locked>> | 96% | 56,594 psi | 90% | 3334 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 54,215 psi | 86% | 3249 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 54,302 psi | 86% | 3159 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% | 41,814 psi | 66% | 2898 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 82% | 44,933 psi | 71% | 3130 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 46,557 psi | 74% | 3058 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 41,872 psi | 66% | 2979 fps | 96% |
| ADI AR 2217 | <<locked>> | 86% | 38,159 psi | 60% | 2883 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 98% | 51,648 psi | 82% | 3263 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 84% | 32,140 psi | 51% | 2748 fps | 95.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,586 psi | 74% | 3051 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,409 psi | 67% | 2982 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,973 psi | 65% | 2924 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,259 psi | 56% | 2830 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,673 psi | 74% | 3099 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 49,821 psi | 79% | 3098 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 39,189 psi | 62% | 2982 fps | 97.2% |
| Bofors RP30 | <<locked>> | 86% | 40,712 psi | 65% | 2952 fps | 96.1% |
| Bofors RP5 | <<locked>> | 80% | 42,409 psi | 67% | 3064 fps | 98.2% |
| Hodgdon H1000 | 59.4 gr | 84% | 36,521 psi | 58% | 2920 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 82% | 41,727 psi | 66% | 2925 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,656 psi | 69% | 2972 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,227 psi | 80% | 3056 fps | 100% |
| Hodgdon Retumbo | 57.5 gr | 80% | 34,519 psi | 55% | 2946 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,094 psi | 45% | 1900 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,214 psi | 83% | 3189 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 47,529 psi | 75% | 3028 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,353 psi | 72% | 3058 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 80% | 43,323 psi | 69% | 3021 fps | 96.5% |
| IMR 8133 Enduron | <<locked>> | 92% | 39,305 psi | 62% | 2931 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 35,476 psi | 56% | 2744 fps | 97.7% |
| Norma 217 | <<locked>> | 88% | 34,185 psi | 54% | 2809 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 45,049 psi | 71% | 3061 fps | 99.1% |
| Ramshot Grand | <<locked>> | 80% | 46,050 psi | 73% | 3089 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 80% | 40,059 psi | 63% | 2911 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,631 psi | 45% | 1941 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 33,736 psi | 53% | 2820 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 46,122 psi | 73% | 3097 fps | 96.3% |
| Rottweil R 904 | <<locked>> | 80% | 47,282 psi | 75% | 3031 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 80% | 45,876 psi | 73% | 3033 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,542 psi | 72% | 3107 fps | 98.9% |
| Somchem S361 | <<locked>> | 80% | 48,457 psi | 77% | 3020 fps | 97.4% |
| Somchem S365 | <<locked>> | 80% | 51,808 psi | 82% | 3111 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,267 psi | 73% | 3008 fps | 99% |
| Vihtavuori N150 | <<locked>> | 80% | 53,098 psi | 84% | 3052 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,001 psi | 62% | 2834 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 80% | 45,223 psi | 72% | 3009 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,612 psi | 68% | 3005 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 84% | 42,395 psi | 67% | 2971 fps | 95.8% |
| Vihtavuori N568 | 67.4 gr | 90% | 46,862 psi | 74% | 3110 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 94% | 52,446 psi | 83% | 3254 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,218 psi | 62% | 2963 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,804 psi | 74% | 3017 fps | 98.6% |
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 50 powders for .244 H&H Mag. loaded with the .243 | 95gr | ShellHouse Castings SP Hard Cast. Hodgdon Retumbo delivers the highest muzzle velocity at 3,409 fps; across all powders the maximum-charge window runs from 2,120 fps to 3,409 fps. ADI AR 2218 gives the best case fill at 100 %, and 50 of the 50 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 95.0 gr projectile in 0.243" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, Hodgdon TrailBoss, IMR 8133 Enduron 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, Hodgdon H1000, Vihtavuori N568 rank at the top here: for .244 H&H Mag. with the .243 | 95gr | ShellHouse Castings SP Hard Cast 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.