Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 149gr | CutEdge ESP Raptor bullet and 83 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% | 58,392 psi | 90% | 3022 fps | 99.4% |
| Accurate 3100 | <<locked>> | 96% | 55,259 psi | 85% | 3018 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 57,711 psi | 89% | 3002 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,333 psi | 87% | 3068 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 58,363 psi | 90% | 3169 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 84% | 57,682 psi | 89% | 3041 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,769 psi | 89% | 3120 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 96% | 55,622 psi | 86% | 3114 fps | 97.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,441 psi | 71% | 2930 fps | 96.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,118 psi | 63% | 2874 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,187 psi | 85% | 3012 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,406 psi | 88% | 3130 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,868 psi | 84% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,246 psi | 88% | 3104 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,317 psi | 85% | 3110 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,173 psi | 86% | 3084 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,011 psi | 80% | 3077 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,232 psi | 88% | 3176 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 58,160 psi | 90% | 3150 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 56,188 psi | 86% | 3025 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,906 psi | 74% | 2999 fps | 97% |
| Bofors RP5 | <<locked>> | 96% | 55,317 psi | 85% | 3110 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 55,477 psi | 85% | 3018 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,300 psi | 79% | 3025 fps | 98% |
| Hodgdon H380 | <<locked>> | 82% | 56,405 psi | 87% | 3045 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 58,421 psi | 90% | 3123 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 57,377 psi | 88% | 3081 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 55,463 psi | 85% | 3051 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 58,363 psi | 90% | 3097 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,696 psi | 89% | 3045 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,966 psi | 78% | 3136 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 86% | 55,535 psi | 85% | 3097 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,608 psi | 56% | 1988 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,014 psi | 88% | 3025 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,145 psi | 88% | 3051 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,159 psi | 88% | 3048 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 56,913 psi | 88% | 3058 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,623 psi | 87% | 3041 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 98% | 57,058 psi | 88% | 3146 fps | 98.3% |
| Lovex S062 | <<locked>> | 82% | 57,203 psi | 88% | 3015 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,522 psi | 89% | 3038 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,521 psi | 85% | 3031 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,489 psi | 81% | 2976 fps | 99.8% |
| Norma 203B | <<locked>> | 82% | 58,233 psi | 90% | 3074 fps | 100% |
| Norma 204 | <<locked>> | 90% | 58,566 psi | 90% | 3110 fps | 99% |
| Norma MRP | <<locked>> | 94% | 55,114 psi | 85% | 3133 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 58,682 psi | 90% | 3107 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 58,160 psi | 90% | 3169 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 90% | 57,798 psi | 89% | 3107 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,681 psi | 87% | 3097 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,333 psi | 57% | 2034 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,347 psi | 87% | 3028 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 58,465 psi | 90% | 3136 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,768 psi | 87% | 3087 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,143 psi | 85% | 3117 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,895 psi | 80% | 3133 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 56,463 psi | 87% | 3022 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,216 psi | 85% | 3028 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 56,449 psi | 87% | 3091 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 55,477 psi | 85% | 3018 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,522 psi | 89% | 3038 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,203 psi | 88% | 3015 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,521 psi | 85% | 3031 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 58,537 psi | 90% | 3084 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,608 psi | 87% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,174 psi | 88% | 2989 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,999 psi | 86% | 3087 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 56,202 psi | 86% | 3018 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,130 psi | 88% | 3012 fps | 97.5% |
| Somchem S365 | <<locked>> | 90% | 55,042 psi | 85% | 3051 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,145 psi | 88% | 3064 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 57,783 psi | 89% | 2989 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,898 psi | 88% | 3045 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,681 psi | 87% | 3035 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 82% | 58,247 psi | 90% | 2989 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 56,101 psi | 86% | 3048 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 58,450 psi | 90% | 3114 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,056 psi | 85% | 3123 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,897 psi | 84% | 3094 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,000 psi | 88% | 2999 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 58,639 psi | 90% | 3123 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 58,378 psi | 90% | 3222 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,464 psi | 88% | 3058 fps | 99% |
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% | 54,447 psi | 84% | 2966 fps | 99% |
| Accurate 3100 | <<locked>> | 82% | 33,330 psi | 51% | 2598 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 54,128 psi | 83% | 2953 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 42,148 psi | 65% | 2828 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 92% | 50,256 psi | 77% | 3035 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 50,734 psi | 78% | 2936 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,785 psi | 63% | 2812 fps | 95.2% |
| ADI AR 2213 | 81.5 gr | 90% | 44,991 psi | 69% | 2920 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 98% | 43,221 psi | 67% | 2864 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 35,868 psi | 55% | 2743 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,793 psi | 80% | 2963 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,770 psi | 63% | 2844 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,181 psi | 73% | 2969 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,698 psi | 63% | 2802 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 88% | 41,553 psi | 64% | 2858 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,950 psi | 46% | 2579 fps | 97.7% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,126 psi | 49% | 2648 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,706 psi | 50% | 2700 fps | 96.7% |
| Bofors RP15 | <<locked>> | 90% | 41,162 psi | 63% | 2844 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 52,460 psi | 81% | 2969 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 41,582 psi | 64% | 2874 fps | 95% |
| Bofors RP5 | <<locked>> | 88% | 41,553 psi | 64% | 2858 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 45,513 psi | 70% | 2844 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 94% | 41,394 psi | 64% | 2828 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 52,721 psi | 81% | 2989 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,280 psi | 68% | 2881 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 46,978 psi | 72% | 2904 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 90% | 48,196 psi | 74% | 2930 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,282 psi | 73% | 2910 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,218 psi | 59% | 2723 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,522 psi | 59% | 2858 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 43,888 psi | 68% | 2894 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,209 psi | 42% | 1785 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,316 psi | 82% | 2969 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,104 psi | 63% | 2766 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,137 psi | 73% | 2877 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 40,393 psi | 62% | 2779 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,586 psi | 72% | 2867 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 92% | 46,050 psi | 71% | 2953 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 53,708 psi | 83% | 2963 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,454 psi | 68% | 2822 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 42,627 psi | 66% | 2802 fps | 97.7% |
| Lovex S071 | <<locked>> | 86% | 32,518 psi | 50% | 2579 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 54,491 psi | 84% | 3018 fps | 100% |
| Norma 204 | <<locked>> | 80% | 41,104 psi | 63% | 2799 fps | 95.2% |
| Norma MRP | 78.5 gr | 84% | 37,971 psi | 58% | 2805 fps | 96% |
| Norma URP | <<locked>> | 80% | 41,655 psi | 64% | 2822 fps | 99.2% |
| Ramshot Grand | <<locked>> | 90% | 42,859 psi | 66% | 2894 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 40,799 psi | 63% | 2808 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 90% | 38,145 psi | 59% | 2759 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,775 psi | 43% | 1827 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,562 psi | 81% | 2969 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,140 psi | 77% | 3022 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,453 psi | 65% | 2848 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,915 psi | 63% | 2858 fps | 98.9% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,505 psi | 55% | 2766 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 49,153 psi | 76% | 2917 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,165 psi | 70% | 2854 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 84% | 39,769 psi | 61% | 2785 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 45,513 psi | 70% | 2844 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,454 psi | 68% | 2822 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 53,708 psi | 83% | 2963 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,627 psi | 66% | 2802 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,010 psi | 79% | 2976 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,792 psi | 77% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,555 psi | 67% | 2762 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,421 psi | 61% | 2779 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 49,356 psi | 76% | 2917 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,427 psi | 71% | 2835 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 38,392 psi | 59% | 2772 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,695 psi | 58% | 2707 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 47,137 psi | 73% | 2835 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,178 psi | 66% | 2822 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 40,190 psi | 62% | 2746 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 54,578 psi | 84% | 2940 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,685 psi | 66% | 2818 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 33,388 psi | 51% | 2654 fps | 97.7% |
| Vihtavuori N560 | 84.1 gr | 90% | 47,645 psi | 73% | 2989 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 96% | 47,500 psi | 73% | 2963 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,656 psi | 66% | 2782 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,454 psi | 68% | 2884 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,513 psi | 41% | 2552 fps | 97.1% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,030 psi | 62% | 2749 fps | 95.1% |
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 89 powders for .300 Rem. Ultra Mag. loaded with the .308 | 149gr | CutEdge ESP Raptor. Winchester StaBALL HD delivers the highest muzzle velocity at 3,222 fps; across all powders the maximum-charge window runs from 1,988 fps to 3,222 fps. ADI AR 2217 gives the best case fill at 100 %, and 89 of the 89 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 149.0 gr projectile in 0.308" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. 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. Norma MRP, Vihtavuori N560, ADI AR 2213 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 149gr | CutEdge ESP Raptor they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, Vihtavuori N170, Vihtavuori N568 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.