Load Specifications
Load data in caliber .244 H&H Mag. with .243 | 115gr | DTAC RBT Closed Nose - Boron Nitride bullet and 39 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Alliant Reloder-50.
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>> | 82% | 54,969 psi | 87% | 2966 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 55,129 psi | 87% | 3084 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 82% | 54,534 psi | 86% | 3071 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 54,491 psi | 86% | 3064 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 55,027 psi | 87% | 3199 fps | 99.4% |
| ADI AR 2225 | <<locked>> | 92% | 54,302 psi | 86% | 3084 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 55,201 psi | 87% | 3068 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 53,751 psi | 85% | 2969 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 54,679 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 57,058 psi | 90% | 3173 fps | 99.3% |
| Alliant Reloder-50 | <<locked>> | 94% | 53,548 psi | 85% | 3100 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 54,491 psi | 86% | 3031 fps | 99.1% |
| Bofors RP15 | <<locked>> | 84% | 54,708 psi | 87% | 3058 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 54,476 psi | 86% | 3074 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 55,201 psi | 87% | 3068 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 55,477 psi | 88% | 3077 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,811 psi | 90% | 3061 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,753 psi | 88% | 3045 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 86% | 54,375 psi | 86% | 3146 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,116 psi | 60% | 1985 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,550 psi | 90% | 3031 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 57,029 psi | 90% | 3120 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 55,274 psi | 88% | 2989 fps | 96.6% |
| IMR 8133 Enduron | <<locked>> | 96% | 57,014 psi | 90% | 3133 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 57,058 psi | 90% | 2995 fps | 100% |
| Norma 217 | <<locked>> | 94% | 55,071 psi | 87% | 3097 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 54,723 psi | 87% | 3081 fps | 100% |
| Ramshot Magnum | <<locked>> | 84% | 53,171 psi | 84% | 3005 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,262 psi | 62% | 2034 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 55,129 psi | 87% | 3130 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 54,041 psi | 86% | 3100 fps | 99.8% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 56,623 psi | 90% | 3084 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 84% | 55,564 psi | 88% | 2992 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 55,085 psi | 87% | 3031 fps | 97.9% |
| Vihtavuori N565 | <<locked>> | 86% | 56,333 psi | 89% | 3091 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 54,549 psi | 86% | 3104 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 90% | 56,043 psi | 89% | 3176 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 82% | 55,071 psi | 87% | 3064 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 55,056 psi | 87% | 2995 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% | 51,242 psi | 81% | 2907 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 40,944 psi | 65% | 2808 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 80% | 50,720 psi | 80% | 3005 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 80% | 38,232 psi | 61% | 2746 fps | 98.3% |
| ADI AR 2218 | 65.3 gr | 86% | 40,828 psi | 65% | 2894 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 35,520 psi | 56% | 2717 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 51,488 psi | 82% | 3002 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 50,343 psi | 80% | 2917 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 44,469 psi | 70% | 2877 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 82% | 39,363 psi | 62% | 2812 fps | 95% |
| Alliant Reloder-50 | 67.8 gr | 88% | 42,786 psi | 68% | 2881 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,819 psi | 76% | 2907 fps | 97.9% |
| Bofors RP15 | <<locked>> | 80% | 48,051 psi | 76% | 2940 fps | 99.9% |
| Bofors RP30 | <<locked>> | 80% | 41,510 psi | 66% | 2825 fps | 99% |
| Bofors RP5 | <<locked>> | 80% | 51,488 psi | 82% | 3002 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 41,742 psi | 66% | 2828 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 80% | 52,982 psi | 84% | 2995 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,982 psi | 82% | 2979 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,743 psi | 69% | 2949 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,674 psi | 45% | 1778 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 53,127 psi | 84% | 2976 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 80% | 49,792 psi | 79% | 2992 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 86% | 51,866 psi | 82% | 2927 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 80% | 33,199 psi | 53% | 2635 fps | 96.3% |
| Lovex S071 | <<locked>> | 80% | 44,295 psi | 70% | 2785 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,866 psi | 54% | 2667 fps | 98.6% |
| Ramshot Grand | <<locked>> | 80% | 50,778 psi | 80% | 3015 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 45,890 psi | 73% | 2881 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,559 psi | 47% | 1821 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 43,729 psi | 69% | 2930 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 40,176 psi | 64% | 2822 fps | 97.5% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 43,105 psi | 68% | 2828 fps | 95.4% |
| Vihtavuori N165 | <<locked>> | 80% | 48,631 psi | 77% | 2877 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 44,947 psi | 71% | 2835 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 80% | 45,963 psi | 73% | 2900 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 80% | 40,973 psi | 65% | 2831 fps | 97.2% |
| Vihtavuori N570 | 61 gr | 82% | 42,148 psi | 67% | 2894 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 51,068 psi | 81% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 51,285 psi | 81% | 2936 fps | 100% |
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 39 powders for .244 H&H Mag. loaded with the .243 | 115gr | DTAC RBT Closed Nose - Boron Nitride. ADI AR 2218 delivers the highest muzzle velocity at 3,199 fps; across all powders the maximum-charge window runs from 1,985 fps to 3,199 fps. Accurate 8700 gives the best case fill at 100 %, and 39 of the 39 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 115.0 gr projectile in 0.243" calls for a 1:7.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ADI AR 2218, Vihtavuori N570, Alliant Reloder-50 rank at the top here: for .244 H&H Mag. with the .243 | 115gr | DTAC RBT Closed Nose - Boron Nitride 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.