Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 130gr | Norma Soft Point bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Norma MRP and Vihtavuori N560.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 55,941 psi | 86% | 3169 fps | 99.8% |
| Accurate 4350 | <<locked>> | 86% | 56,463 psi | 87% | 3222 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 54,636 psi | 84% | 3248 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 82% | 56,956 psi | 88% | 3196 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 57,725 psi | 89% | 3271 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 94% | 55,651 psi | 86% | 3264 fps | 97.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,169 psi | 77% | 3136 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,049 psi | 69% | 3091 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 58,494 psi | 90% | 3222 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,145 psi | 88% | 3284 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,592 psi | 84% | 3235 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 57,232 psi | 88% | 3255 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 55,767 psi | 86% | 3258 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 56,942 psi | 88% | 3241 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 56,797 psi | 87% | 3294 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 58,044 psi | 89% | 3327 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 58,624 psi | 90% | 3301 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 52,707 psi | 81% | 3215 fps | 97.6% |
| Bofors RP5 | <<locked>> | 94% | 55,767 psi | 86% | 3258 fps | 98.6% |
| Bofors RP7 | <<locked>> | 86% | 58,566 psi | 90% | 3225 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 55,593 psi | 86% | 3238 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 86% | 58,320 psi | 90% | 3274 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 56,855 psi | 88% | 3228 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 92% | 55,535 psi | 85% | 3199 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 58,262 psi | 90% | 3241 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,638 psi | 89% | 3199 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 55,637 psi | 86% | 3360 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 84% | 55,332 psi | 85% | 3238 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 57% | 2152 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,927 psi | 88% | 3202 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,420 psi | 87% | 3192 fps | 99.4% |
| IMR 4831 | <<locked>> | 88% | 56,971 psi | 88% | 3212 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 56,449 psi | 87% | 3189 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 96% | 57,406 psi | 88% | 3301 fps | 97.9% |
| Lovex S065 | <<locked>> | 86% | 57,087 psi | 88% | 3189 fps | 99.9% |
| Lovex S070 | <<locked>> | 86% | 55,434 psi | 85% | 3182 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,101 psi | 88% | 3189 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 58,204 psi | 90% | 3255 fps | 98.7% |
| Norma MRP | <<locked>> | 92% | 55,767 psi | 86% | 3281 fps | 99.5% |
| Norma URP | <<locked>> | 88% | 58,639 psi | 90% | 3261 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 58,653 psi | 90% | 3323 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 88% | 57,711 psi | 89% | 3255 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 57,551 psi | 89% | 3248 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,550 psi | 58% | 2201 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 58,146 psi | 89% | 3291 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,869 psi | 88% | 3238 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 55,245 psi | 85% | 3264 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 57,377 psi | 88% | 3356 fps | 100% |
| Rottweil R 903 | <<locked>> | 82% | 56,202 psi | 86% | 3176 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 58,798 psi | 90% | 3238 fps | 98% |
| Rottweil R 905 | <<locked>> | 92% | 56,695 psi | 87% | 3245 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 86% | 58,566 psi | 90% | 3225 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 57,087 psi | 88% | 3189 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 55,434 psi | 85% | 3182 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 58,001 psi | 89% | 3235 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,811 psi | 86% | 3054 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,579 psi | 87% | 3136 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,275 psi | 87% | 3238 fps | 98.7% |
| Somchem S355 | <<locked>> | 82% | 55,782 psi | 86% | 3173 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,130 psi | 88% | 3156 fps | 97.2% |
| Somchem S365 | <<locked>> | 88% | 55,463 psi | 85% | 3209 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 57,363 psi | 88% | 3212 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 84% | 57,290 psi | 88% | 3140 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,550 psi | 87% | 3196 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 57,101 psi | 88% | 3186 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 86% | 55,985 psi | 86% | 3196 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,288 psi | 85% | 3219 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 55,506 psi | 85% | 3268 fps | 97% |
| Vihtavuori N565 | <<locked>> | 98% | 55,854 psi | 86% | 3241 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 56,681 psi | 87% | 3143 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 58,508 psi | 90% | 3278 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 96% | 55,376 psi | 85% | 3317 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 57,522 psi | 89% | 3202 fps | 98.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 36,550 psi | 56% | 2799 fps | 96% |
| Accurate 4350 | <<locked>> | 80% | 45,658 psi | 70% | 3038 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 90% | 50,792 psi | 78% | 3176 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 53,345 psi | 82% | 3140 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 43,743 psi | 67% | 3012 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 90% | 48,240 psi | 74% | 3127 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 98% | 46,746 psi | 72% | 3068 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 94% | 36,651 psi | 56% | 2881 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,781 psi | 84% | 3166 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,482 psi | 67% | 3045 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,705 psi | 78% | 3176 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 43,642 psi | 67% | 3002 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 42,119 psi | 65% | 2995 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,474 psi | 50% | 2769 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 34,940 psi | 54% | 2848 fps | 96.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,984 psi | 55% | 2904 fps | 97.2% |
| Bofors RP15 | <<locked>> | 90% | 44,686 psi | 69% | 3051 fps | 95.9% |
| Bofors RP30 | <<locked>> | 96% | 45,687 psi | 70% | 3081 fps | 95.6% |
| Bofors RP5 | <<locked>> | 86% | 42,119 psi | 65% | 2995 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 48,254 psi | 74% | 3045 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 94% | 44,759 psi | 69% | 3031 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 47,369 psi | 73% | 3084 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 49,821 psi | 77% | 3107 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 51,663 psi | 80% | 3130 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 90% | 50,589 psi | 78% | 3110 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,060 psi | 63% | 2920 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 92% | 41,959 psi | 65% | 3071 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 47,326 psi | 73% | 3097 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,528 psi | 42% | 1942 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,642 psi | 67% | 2959 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,574 psi | 76% | 3074 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 43,424 psi | 67% | 2976 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 88% | 49,530 psi | 76% | 3068 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 90% | 46,441 psi | 71% | 3094 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 47,108 psi | 73% | 3022 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 45,513 psi | 70% | 3002 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 35,665 psi | 55% | 2776 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 43,888 psi | 68% | 2992 fps | 95.4% |
| Norma MRP | 86.2 gr | 82% | 38,406 psi | 59% | 2936 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 44,672 psi | 69% | 3022 fps | 99.3% |
| Ramshot Grand | <<locked>> | 90% | 46,528 psi | 72% | 3104 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 43,729 psi | 67% | 3005 fps | 98% |
| Ramshot Magnum | <<locked>> | 88% | 38,870 psi | 60% | 2897 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,065 psi | 43% | 1985 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 53,925 psi | 83% | 3228 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,730 psi | 70% | 3048 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,005 psi | 68% | 3061 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 39,102 psi | 60% | 2976 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 80% | 52,533 psi | 81% | 3123 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 48,124 psi | 74% | 3051 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 42,960 psi | 66% | 2989 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 48,254 psi | 74% | 3045 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,108 psi | 73% | 3022 fps | 99% |
| Shooters World SW4350 | <<locked>> | 80% | 45,513 psi | 70% | 3002 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 54,114 psi | 83% | 3176 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,359 psi | 81% | 3005 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,369 psi | 71% | 2963 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 42,612 psi | 66% | 2982 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 52,243 psi | 80% | 3117 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 49,734 psi | 77% | 3035 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 41,553 psi | 64% | 2972 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 40,712 psi | 63% | 2904 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 50,154 psi | 77% | 3035 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,151 psi | 71% | 3022 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 40,437 psi | 62% | 2881 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 45,629 psi | 70% | 3015 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 36,492 psi | 56% | 2854 fps | 98% |
| Vihtavuori N560 | 92.5 gr | 88% | 48,008 psi | 74% | 3130 fps | 95% |
| Vihtavuori N565 | <<locked>> | 94% | 48,472 psi | 75% | 3110 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,643 psi | 70% | 2972 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,529 psi | 73% | 3087 fps | 98.1% |
| Winchester StaBALL HD | 83.2 gr | 80% | 29,066 psi | 45% | 2753 fps | 97.7% |
| Winchester Supreme 780 | <<locked>> | 86% | 43,149 psi | 66% | 2946 fps | 95.5% |
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 80 powders for .300 Rem. Ultra Mag. loaded with the .308 | 130gr | Norma Soft Point. Hodgdon Retumbo delivers the highest muzzle velocity at 3,360 fps; across all powders the maximum-charge window runs from 2,152 fps to 3,360 fps. ADI AR 2217 gives the best case fill at 100 %, and 80 of the 80 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Winchester StaBALL HD, Norma MRP, Vihtavuori N560 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 130gr | Norma Soft Point they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, Vihtavuori N170, Vihtavuori N570 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.