Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 165gr | Barnes BND SPIT-FIRE bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Hodgdon Retumbo and ReloadSwiss RS 76.
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 3100 | <<locked>> | 92% | 55,463 psi | 85% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,057 psi | 86% | 2940 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 58,102 psi | 89% | 3058 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 90% | 57,087 psi | 88% | 2995 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 92% | 55,085 psi | 85% | 2999 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,200 psi | 82% | 2953 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,805 psi | 74% | 2913 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,000 psi | 88% | 2995 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 58,334 psi | 90% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,550 psi | 87% | 2982 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,317 psi | 85% | 2992 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,637 psi | 87% | 2966 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,434 psi | 87% | 3025 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,696 psi | 89% | 3054 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,594 psi | 87% | 2953 fps | 96.7% |
| Bofors RP15 | <<locked>> | 96% | 58,233 psi | 90% | 3038 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,202 psi | 86% | 3025 fps | 99.3% |
| Bofors RP5 | <<locked>> | 92% | 55,317 psi | 85% | 2992 fps | 99.5% |
| Bofors RP7 | <<locked>> | 84% | 57,899 psi | 89% | 2943 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 54,911 psi | 85% | 2982 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 84% | 57,609 psi | 89% | 2992 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,304 psi | 87% | 2949 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 92% | 58,798 psi | 90% | 2995 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,479 psi | 88% | 2976 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,145 psi | 88% | 2913 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,303 psi | 85% | 3100 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 58,755 psi | 90% | 3028 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,217 psi | 57% | 1919 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,188 psi | 86% | 2923 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,724 psi | 86% | 2910 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 56,362 psi | 87% | 2930 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,622 psi | 86% | 2923 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 94% | 56,971 psi | 88% | 3035 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,236 psi | 67% | 2815 fps | 96.8% |
| Lovex S065 | <<locked>> | 84% | 56,478 psi | 87% | 2907 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 58,465 psi | 90% | 2956 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,710 psi | 87% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,377 psi | 88% | 2979 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 43,555 psi | 67% | 2844 fps | 98.9% |
| Norma MRP | <<locked>> | 90% | 55,201 psi | 85% | 3012 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,117 psi | 89% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 58,001 psi | 89% | 3054 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 57,058 psi | 88% | 2979 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,782 psi | 87% | 2986 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,058 psi | 59% | 1962 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,246 psi | 87% | 2959 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 54,810 psi | 84% | 2989 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,623 psi | 87% | 3094 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,043 psi | 86% | 3045 fps | 98.5% |
| Rottweil R 904 | <<locked>> | 90% | 58,073 psi | 89% | 2966 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 90% | 56,173 psi | 86% | 2972 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 57,899 psi | 89% | 2943 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,478 psi | 87% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 58,465 psi | 90% | 2956 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 58,726 psi | 90% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,782 psi | 86% | 2861 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,753 psi | 86% | 2969 fps | 99.5% |
| Somchem S361 | <<locked>> | 88% | 56,115 psi | 86% | 2897 fps | 98.4% |
| Somchem S365 | <<locked>> | 86% | 55,172 psi | 85% | 2923 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,666 psi | 87% | 2943 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 56,478 psi | 87% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,028 psi | 86% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,434 psi | 87% | 2923 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 84% | 55,390 psi | 85% | 2917 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 58,769 psi | 90% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,897 psi | 84% | 3009 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 96% | 55,434 psi | 85% | 2992 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,623 psi | 87% | 3048 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,825 psi | 86% | 2864 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,812 psi | 89% | 2995 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 55,332 psi | 85% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,768 psi | 87% | 2936 fps | 99.6% |
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 3100 | <<locked>> | 80% | 36,593 psi | 56% | 2572 fps | 97.9% |
| Accurate 4350 | <<locked>> | 80% | 48,791 psi | 75% | 2828 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 43,569 psi | 67% | 2802 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 40,509 psi | 62% | 2700 fps | 96.5% |
| ADI AR 2213 | <<locked>> | 84% | 41,568 psi | 64% | 2749 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 92% | 40,509 psi | 62% | 2713 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 88% | 31,923 psi | 49% | 2546 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,543 psi | 72% | 2838 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,157 psi | 83% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,596 psi | 62% | 2697 fps | 96.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,477 psi | 56% | 2635 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,114 psi | 54% | 2602 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,487 psi | 47% | 2507 fps | 96.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,001 psi | 60% | 2743 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,214 psi | 82% | 2897 fps | 95.9% |
| Bofors RP15 | <<locked>> | 82% | 36,318 psi | 56% | 2628 fps | 95% |
| Bofors RP30 | <<locked>> | 90% | 39,624 psi | 61% | 2723 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 36,477 psi | 56% | 2635 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 51,010 psi | 79% | 2831 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 88% | 38,580 psi | 59% | 2674 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 50,285 psi | 77% | 2877 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 80% | 52,620 psi | 81% | 2894 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 44,570 psi | 69% | 2756 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 43,598 psi | 67% | 2736 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,888 psi | 68% | 2717 fps | 100% |
| Hodgdon Retumbo | 79.7 gr | 86% | 36,550 psi | 56% | 2713 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 50,517 psi | 78% | 2900 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,746 psi | 43% | 1719 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,296 psi | 71% | 2759 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,185 psi | 80% | 2854 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 46,180 psi | 71% | 2772 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,076 psi | 66% | 2697 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 84% | 40,030 psi | 62% | 2726 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 98% | 40,350 psi | 62% | 2753 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 49,806 psi | 77% | 2805 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 48,211 psi | 74% | 2795 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 31,430 psi | 48% | 2448 fps | 96% |
| Norma 204 | <<locked>> | 80% | 46,630 psi | 72% | 2799 fps | 98% |
| Norma 217 | <<locked>> | 92% | 32,982 psi | 51% | 2598 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 38,392 psi | 59% | 2703 fps | 97.4% |
| Norma URP | <<locked>> | 80% | 47,572 psi | 73% | 2815 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 39,914 psi | 61% | 2730 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 46,543 psi | 72% | 2808 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 84% | 35,810 psi | 55% | 2608 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,413 psi | 44% | 1762 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,849 psi | 75% | 2844 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,079 psi | 72% | 2864 fps | 100% |
| ReloadSwiss RS 76 | 83.3 gr | 84% | 33,475 psi | 52% | 2621 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 44,208 psi | 68% | 2841 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 41,858 psi | 64% | 2684 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 40,030 psi | 62% | 2684 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 80% | 51,010 psi | 79% | 2831 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,806 psi | 77% | 2805 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 48,211 psi | 74% | 2795 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,071 psi | 85% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,863 psi | 75% | 2753 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,711 psi | 61% | 2677 fps | 96.4% |
| Somchem S361 | <<locked>> | 80% | 42,714 psi | 66% | 2664 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 44,802 psi | 69% | 2769 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,567 psi | 62% | 2664 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 80% | 52,968 psi | 82% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,037 psi | 75% | 2808 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,157 psi | 54% | 2533 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 48,472 psi | 75% | 2812 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,436 psi | 61% | 2680 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 84% | 44,454 psi | 68% | 2822 fps | 96% |
| Vihtavuori N565 | <<locked>> | 88% | 41,930 psi | 65% | 2746 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 94% | 45,353 psi | 70% | 2854 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,399 psi | 74% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,473 psi | 78% | 2881 fps | 99.6% |
| Winchester StaBALL HD | 76.1 gr | 80% | 31,502 psi | 48% | 2621 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,159 psi | 57% | 2585 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 72 powders for .300 Rem. Ultra Mag. loaded with the .308 | 165gr | Barnes BND SPIT-FIRE. Hodgdon Retumbo delivers the highest muzzle velocity at 3,100 fps; across all powders the maximum-charge window runs from 1,919 fps to 3,100 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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. The 165.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 165gr | Barnes BND SPIT-FIRE 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.