Load Specifications
Load data in caliber .244 H&H Mag. with .243 | 80gr | Osprey Virtus bullet and 61 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, IMR 7828 SSC and Winchester StaBALL HD.
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>> | 90% | 56,347 psi | 89% | 3458 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,550 psi | 90% | 3497 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 55,564 psi | 88% | 3563 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 86% | 54,201 psi | 86% | 3501 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 90% | 56,391 psi | 89% | 3576 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 98% | 54,984 psi | 87% | 3530 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,679 psi | 85% | 3553 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,114 psi | 86% | 3504 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 53,983 psi | 86% | 3488 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,666 psi | 90% | 3566 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,621 psi | 87% | 3478 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,868 psi | 87% | 3543 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,143 psi | 87% | 3560 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 53,795 psi | 85% | 3451 fps | 96% |
| Bofors RP15 | <<locked>> | 92% | 56,101 psi | 89% | 3553 fps | 99.4% |
| Bofors RP30 | <<locked>> | 96% | 54,752 psi | 87% | 3543 fps | 99% |
| Bofors RP5 | <<locked>> | 90% | 56,666 psi | 90% | 3566 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 96% | 56,608 psi | 90% | 3566 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 88% | 55,796 psi | 88% | 3501 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,520 psi | 86% | 3478 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 54,433 psi | 86% | 3419 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 53,853 psi | 85% | 3625 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,275 psi | 59% | 2336 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,536 psi | 90% | 3484 fps | 99.8% |
| IMR 4831 | <<locked>> | 82% | 53,316 psi | 85% | 3425 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,260 psi | 89% | 3481 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 90% | 54,621 psi | 87% | 3550 fps | 98.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,820 psi | 77% | 3432 fps | 97.8% |
| Lovex S065 | <<locked>> | 82% | 56,652 psi | 90% | 3465 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,940 psi | 87% | 3455 fps | 99.9% |
| Lovex S071 | <<locked>> | 94% | 54,230 psi | 86% | 3422 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,230 psi | 86% | 3478 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 49,676 psi | 79% | 3465 fps | 99.5% |
| Norma MRP | <<locked>> | 88% | 56,985 psi | 90% | 3589 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,824 psi | 87% | 3474 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,724 psi | 88% | 3570 fps | 99% |
| Ramshot Hunter | <<locked>> | 82% | 54,143 psi | 86% | 3481 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,563 psi | 86% | 3488 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,159 psi | 60% | 2388 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,014 psi | 89% | 3553 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,027 psi | 87% | 3612 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 54,447 psi | 86% | 3553 fps | 97.9% |
| Rottweil R 904 | <<locked>> | 86% | 55,042 psi | 87% | 3471 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 88% | 57,087 psi | 90% | 3543 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,652 psi | 90% | 3465 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,940 psi | 87% | 3455 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,593 psi | 88% | 3406 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,681 psi | 90% | 3537 fps | 99.5% |
| Somchem S361 | <<locked>> | 86% | 56,637 psi | 90% | 3451 fps | 98.4% |
| Somchem S365 | <<locked>> | 84% | 56,101 psi | 89% | 3481 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 53,954 psi | 86% | 3442 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 82% | 56,550 psi | 90% | 3471 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 53,809 psi | 85% | 3422 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 82% | 55,796 psi | 88% | 3471 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,318 psi | 89% | 3507 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,507 psi | 90% | 3589 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 92% | 53,156 psi | 84% | 3488 fps | 98.1% |
| Vihtavuori N568 | <<locked>> | 96% | 54,795 psi | 87% | 3556 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,405 psi | 89% | 3409 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 54,114 psi | 86% | 3556 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 53,795 psi | 85% | 3432 fps | 99.2% |
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% | 39,508 psi | 63% | 3114 fps | 98.3% |
| Accurate 4350 | <<locked>> | 80% | 52,620 psi | 83% | 3428 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 47,993 psi | 76% | 3406 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 43,932 psi | 70% | 3281 fps | 97.1% |
| ADI AR 2213 | <<locked>> | 82% | 42,322 psi | 67% | 3268 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 90% | 41,321 psi | 65% | 3228 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 88% | 34,954 psi | 55% | 3094 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,589 psi | 80% | 3438 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,845 psi | 69% | 3271 fps | 97.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,871 psi | 63% | 3199 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,334 psi | 61% | 3143 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,112 psi | 52% | 3035 fps | 96.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,642 psi | 69% | 3327 fps | 99.8% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 50,502 psi | 80% | 3383 fps | 95% |
| Bofors RP15 | <<locked>> | 82% | 39,552 psi | 63% | 3182 fps | 95.6% |
| Bofors RP30 | <<locked>> | 88% | 40,915 psi | 65% | 3232 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 39,871 psi | 63% | 3199 fps | 95.9% |
| Hodgdon H1000 | <<locked>> | 86% | 39,305 psi | 62% | 3176 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 82% | 45,107 psi | 71% | 3274 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 82% | 44,266 psi | 70% | 3258 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,427 psi | 75% | 3294 fps | 100% |
| Hodgdon Retumbo | 62.4 gr | 84% | 37,289 psi | 59% | 3215 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,847 psi | 44% | 2100 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,647 psi | 79% | 3350 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 49,748 psi | 79% | 3360 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,163 psi | 68% | 3202 fps | 95.2% |
| IMR 7828 SSC | 62.4 gr | 84% | 44,005 psi | 70% | 3320 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 96% | 42,250 psi | 67% | 3278 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 52,982 psi | 84% | 3399 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,590 psi | 82% | 3392 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 33,750 psi | 53% | 2956 fps | 96.3% |
| Norma 204 | <<locked>> | 80% | 50,589 psi | 80% | 3406 fps | 98.5% |
| Norma 217 | <<locked>> | 92% | 36,898 psi | 58% | 3159 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 42,250 psi | 67% | 3281 fps | 98% |
| Norma URP | <<locked>> | 80% | 51,358 psi | 81% | 3415 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 40,741 psi | 65% | 3245 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 50,575 psi | 80% | 3409 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 36,666 psi | 58% | 3094 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,514 psi | 45% | 2149 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,866 psi | 82% | 3478 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 34,127 psi | 54% | 3097 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 46,398 psi | 74% | 3383 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 44,933 psi | 71% | 3258 fps | 96.4% |
| Rottweil R 905 | <<locked>> | 80% | 43,352 psi | 69% | 3258 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,982 psi | 84% | 3399 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,590 psi | 82% | 3392 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,156 psi | 83% | 3343 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,004 psi | 68% | 3248 fps | 97% |
| Somchem S361 | <<locked>> | 80% | 46,035 psi | 73% | 3238 fps | 96% |
| Somchem S365 | <<locked>> | 80% | 48,820 psi | 77% | 3356 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,845 psi | 69% | 3232 fps | 98% |
| Vihtavuori N160 | <<locked>> | 80% | 52,779 psi | 84% | 3402 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,014 psi | 60% | 3074 fps | 96% |
| Vihtavuori N550 | <<locked>> | 80% | 52,170 psi | 83% | 3406 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,786 psi | 68% | 3241 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 45,252 psi | 72% | 3346 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 86% | 42,975 psi | 68% | 3261 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 92% | 47,123 psi | 75% | 3392 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,475 psi | 83% | 3343 fps | 100% |
| Winchester StaBALL HD | 61.1 gr | 80% | 35,998 psi | 57% | 3176 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,350 psi | 64% | 3140 fps | 96.2% |
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 67 powders for .244 H&H Mag. loaded with the .243 | 80gr | Osprey Virtus. Hodgdon Retumbo delivers the highest muzzle velocity at 3,625 fps; across all powders the maximum-charge window runs from 2,336 fps to 3,625 fps. ADI AR 2218 gives the best case fill at 100 %, and 67 of the 67 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 80.0 gr projectile in 0.243" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-50 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, IMR 7828 SSC, Winchester StaBALL HD rank at the top here: for .244 H&H Mag. with the .243 | 80gr | Osprey Virtus they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2218, Alliant Reloder-50, IMR 7977 Enduron 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.