Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 130gr | Ferrobull Entox Sport bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and ADI AR 2213.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 58,349 psi | 90% | 3182 fps | 99.1% |
| Accurate 3100 | <<locked>> | 96% | 55,593 psi | 86% | 3169 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 57,812 psi | 89% | 3169 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,463 psi | 87% | 3228 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 57,624 psi | 89% | 3209 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,943 psi | 89% | 3274 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 55,956 psi | 86% | 3268 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,524 psi | 64% | 3009 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,216 psi | 85% | 3176 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,522 psi | 89% | 3294 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,926 psi | 85% | 3248 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,377 psi | 88% | 3258 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,709 psi | 86% | 3264 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,739 psi | 87% | 3245 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,460 psi | 81% | 3232 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,856 psi | 89% | 3333 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 58,494 psi | 90% | 3304 fps | 98.8% |
| Bofors RP3 | <<locked>> | 82% | 56,347 psi | 87% | 3192 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,515 psi | 75% | 3143 fps | 96.3% |
| Bofors RP5 | <<locked>> | 96% | 55,709 psi | 86% | 3264 fps | 98.5% |
| Bofors RP7 | <<locked>> | 86% | 55,448 psi | 85% | 3176 fps | 98.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,721 psi | 80% | 3169 fps | 97.4% |
| Hodgdon H380 | <<locked>> | 82% | 56,449 psi | 87% | 3209 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 58,624 psi | 90% | 3281 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 57,595 psi | 89% | 3241 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 94% | 55,782 psi | 86% | 3205 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 58,697 psi | 90% | 3251 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,856 psi | 89% | 3205 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,401 psi | 79% | 3284 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 86% | 55,898 psi | 86% | 3251 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,390 psi | 56% | 2139 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,811 psi | 87% | 3189 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,406 psi | 88% | 3209 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,232 psi | 88% | 3205 fps | 99.3% |
| IMR 4831 | <<locked>> | 90% | 57,043 psi | 88% | 3219 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,768 psi | 87% | 3192 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 57,435 psi | 88% | 3304 fps | 97.7% |
| Lovex S062 | <<locked>> | 82% | 57,159 psi | 88% | 3182 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,667 psi | 89% | 3202 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 55,709 psi | 86% | 3186 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,765 psi | 81% | 3123 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 58,291 psi | 90% | 3241 fps | 100% |
| Norma 204 | <<locked>> | 88% | 54,810 psi | 84% | 3202 fps | 97.9% |
| Norma MRP | <<locked>> | 94% | 55,608 psi | 86% | 3287 fps | 99.4% |
| Norma URP | <<locked>> | 88% | 55,027 psi | 85% | 3212 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 58,581 psi | 90% | 3323 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 58,073 psi | 89% | 3264 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,508 psi | 89% | 3255 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,159 psi | 57% | 2188 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,376 psi | 87% | 3189 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 58,537 psi | 90% | 3301 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,927 psi | 88% | 3245 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,521 psi | 85% | 3274 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,794 psi | 81% | 3284 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 56,405 psi | 87% | 3186 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,317 psi | 85% | 3182 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 94% | 56,884 psi | 88% | 3248 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 55,448 psi | 85% | 3176 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,667 psi | 89% | 3202 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 57,159 psi | 88% | 3182 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,709 psi | 86% | 3186 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 58,595 psi | 90% | 3248 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,637 psi | 87% | 3068 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,246 psi | 88% | 3146 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,420 psi | 87% | 3241 fps | 98.5% |
| Somchem S355 | <<locked>> | 84% | 56,260 psi | 87% | 3186 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,537 psi | 89% | 3163 fps | 97% |
| Somchem S365 | <<locked>> | 90% | 55,332 psi | 85% | 3212 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,334 psi | 88% | 3215 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 57,856 psi | 89% | 3153 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,956 psi | 88% | 3205 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,130 psi | 88% | 3186 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 58,320 psi | 90% | 3153 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 56,347 psi | 87% | 3205 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,897 psi | 84% | 3219 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,506 psi | 85% | 3274 fps | 96.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,405 psi | 85% | 3238 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,290 psi | 88% | 3156 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,839 psi | 84% | 3222 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 98% | 54,317 psi | 84% | 3314 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,899 psi | 89% | 3212 fps | 98.6% |
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 2700 | <<locked>> | 80% | 54,505 psi | 84% | 3120 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 35,853 psi | 55% | 2789 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 54,085 psi | 83% | 3117 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 42,090 psi | 65% | 2972 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 50,734 psi | 78% | 3097 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 43,772 psi | 67% | 3015 fps | 95.3% |
| ADI AR 2213 | 90.4 gr | 92% | 48,486 psi | 75% | 3130 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 98% | 38,653 psi | 59% | 2936 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,677 psi | 80% | 3120 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,567 psi | 62% | 2986 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,210 psi | 73% | 3123 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 43,714 psi | 67% | 3009 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 90% | 44,904 psi | 69% | 3061 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,907 psi | 46% | 2700 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 88% | 34,418 psi | 53% | 2835 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,793 psi | 50% | 2825 fps | 95.6% |
| Bofors RP15 | <<locked>> | 92% | 44,280 psi | 68% | 3045 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 52,489 psi | 81% | 3133 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,962 psi | 69% | 3074 fps | 95.2% |
| Bofors RP5 | <<locked>> | 90% | 44,904 psi | 69% | 3061 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 45,440 psi | 70% | 2992 fps | 96.9% |
| Hodgdon H1000 | <<locked>> | 96% | 44,730 psi | 69% | 3031 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 52,649 psi | 81% | 3146 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 44,309 psi | 68% | 3025 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 46,934 psi | 72% | 3051 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 92% | 52,054 psi | 80% | 3140 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 50,923 psi | 78% | 3120 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,072 psi | 59% | 2864 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 94% | 41,495 psi | 64% | 3061 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 44,063 psi | 68% | 3038 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,166 psi | 42% | 1926 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,359 psi | 82% | 3136 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,075 psi | 63% | 2904 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,007 psi | 72% | 3028 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 40,219 psi | 62% | 2917 fps | 98.5% |
| IMR 4955 Enduron | <<locked>> | 90% | 49,850 psi | 77% | 3071 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 94% | 49,719 psi | 77% | 3163 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 53,548 psi | 82% | 3127 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,425 psi | 68% | 2969 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 42,641 psi | 66% | 2946 fps | 96.9% |
| Lovex S071 | <<locked>> | 88% | 34,925 psi | 54% | 2766 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 54,418 psi | 84% | 3179 fps | 100% |
| Norma 204 | <<locked>> | 82% | 44,193 psi | 68% | 3002 fps | 95.2% |
| Norma MRP | 85.2 gr | 84% | 38,072 psi | 59% | 2933 fps | 95% |
| Norma URP | <<locked>> | 80% | 41,684 psi | 64% | 2966 fps | 98.6% |
| Ramshot Grand | <<locked>> | 92% | 46,456 psi | 71% | 3104 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 40,785 psi | 63% | 2949 fps | 97% |
| Ramshot Magnum | <<locked>> | 92% | 41,698 psi | 64% | 2966 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 43% | 1972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,678 psi | 81% | 3127 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,140 psi | 77% | 3179 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,467 psi | 65% | 2989 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,944 psi | 63% | 2999 fps | 98.2% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 38,638 psi | 59% | 2966 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 49,211 psi | 76% | 3071 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 48,385 psi | 74% | 3058 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 86% | 42,728 psi | 66% | 2986 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 45,440 psi | 70% | 2992 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,425 psi | 68% | 2969 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 53,548 psi | 82% | 3127 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,641 psi | 66% | 2946 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,010 psi | 79% | 3130 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,719 psi | 77% | 2972 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,497 psi | 67% | 2907 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 42,366 psi | 65% | 2979 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 49,269 psi | 76% | 3074 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 50,082 psi | 77% | 3038 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 38,334 psi | 59% | 2913 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 40,480 psi | 62% | 2904 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 47,195 psi | 73% | 2992 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,091 psi | 66% | 2966 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 88% | 40,234 psi | 62% | 2881 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 54,520 psi | 84% | 3100 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,612 psi | 66% | 2963 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 33,315 psi | 51% | 2782 fps | 96.7% |
| Vihtavuori N560 | 93.3 gr | 92% | 51,590 psi | 79% | 3205 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 96% | 47,819 psi | 74% | 3100 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,772 psi | 66% | 2927 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,469 psi | 68% | 3028 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,498 psi | 41% | 2657 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 43,207 psi | 66% | 2949 fps | 95.3% |
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 81 powders for .300 Rem. Ultra Mag. loaded with the .308 | 130gr | Ferrobull Entox Sport. Alliant Reloder-26 delivers the highest muzzle velocity at 3,333 fps; across all powders the maximum-charge window runs from 2,139 fps to 3,333 fps. ADI AR 2225 gives the best case fill at 100 %, and 81 of the 81 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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. Norma MRP, Vihtavuori N560, ADI AR 2213 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 130gr | Ferrobull Entox Sport 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.