Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 168gr | Nosler Ballistic Tip Hunting bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon H1000, 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 57,580 psi | 89% | 2917 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 58,160 psi | 90% | 2946 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 55,288 psi | 85% | 3005 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 90% | 56,289 psi | 87% | 3009 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 88% | 55,288 psi | 85% | 2953 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 92% | 57,159 psi | 88% | 3012 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,535 psi | 85% | 2972 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,995 psi | 77% | 2933 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 55,419 psi | 85% | 2946 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 84% | 55,216 psi | 85% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 58,537 psi | 90% | 2992 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,464 psi | 88% | 3005 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 55,201 psi | 85% | 2923 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,911 psi | 85% | 2982 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,825 psi | 86% | 3005 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 53,040 psi | 82% | 2986 fps | 96.2% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 58,450 psi | 90% | 2966 fps | 97.4% |
| Bofors RP15 | <<locked>> | 94% | 56,637 psi | 87% | 2992 fps | 99.7% |
| Bofors RP30 | <<locked>> | 98% | 54,839 psi | 84% | 2986 fps | 99.3% |
| Bofors RP5 | <<locked>> | 92% | 57,464 psi | 88% | 3005 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 55,724 psi | 86% | 2890 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 98% | 57,087 psi | 88% | 2999 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 55,738 psi | 86% | 2943 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,943 psi | 89% | 2956 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 90% | 56,768 psi | 87% | 2946 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,564 psi | 86% | 2930 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 55,477 psi | 85% | 2871 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,769 psi | 89% | 3114 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,695 psi | 87% | 2976 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,304 psi | 57% | 1909 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,914 psi | 89% | 2930 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,276 psi | 88% | 2917 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 58,305 psi | 90% | 2936 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,261 psi | 88% | 2930 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 92% | 55,143 psi | 85% | 2989 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,353 psi | 70% | 2838 fps | 97.7% |
| Lovex S065 | <<locked>> | 84% | 58,059 psi | 89% | 2910 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,507 psi | 87% | 2910 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 55,114 psi | 85% | 2881 fps | 100% |
| Norma 204 | <<locked>> | 84% | 55,390 psi | 85% | 2930 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 46,006 psi | 71% | 2867 fps | 99.4% |
| Norma MRP | <<locked>> | 90% | 57,667 psi | 89% | 3028 fps | 100% |
| Norma URP | <<locked>> | 84% | 56,217 psi | 87% | 2927 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 56,260 psi | 87% | 3009 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 84% | 55,187 psi | 85% | 2930 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 55,027 psi | 85% | 2943 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 58,276 psi | 90% | 2966 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,840 psi | 87% | 2995 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,911 psi | 85% | 3048 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 54,302 psi | 84% | 2999 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 88% | 56,014 psi | 86% | 2920 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 90% | 58,059 psi | 89% | 2982 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 55,724 psi | 86% | 2890 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 58,059 psi | 89% | 2910 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,507 psi | 87% | 2910 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,305 psi | 88% | 2864 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,682 psi | 89% | 2979 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 57,856 psi | 89% | 2907 fps | 98.8% |
| Somchem S365 | <<locked>> | 86% | 57,261 psi | 88% | 2930 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 58,653 psi | 90% | 2953 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 58,146 psi | 89% | 2851 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,972 psi | 89% | 2920 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 58,610 psi | 90% | 2933 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 84% | 57,232 psi | 88% | 2923 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,087 psi | 88% | 2949 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,174 psi | 88% | 3025 fps | 99% |
| Vihtavuori N565 | <<locked>> | 96% | 57,725 psi | 89% | 3005 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 98% | 54,911 psi | 85% | 3002 fps | 98% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 55,970 psi | 86% | 3058 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,740 psi | 89% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,941 psi | 86% | 2946 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 58,276 psi | 90% | 3058 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 58,726 psi | 90% | 2949 fps | 99.8% |
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>> | 80% | 38,072 psi | 59% | 2585 fps | 98.5% |
| Accurate 4350 | <<locked>> | 80% | 50,575 psi | 78% | 2838 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 41,524 psi | 64% | 2756 fps | 96.1% |
| Accurate MAGPRO | <<locked>> | 84% | 45,310 psi | 70% | 2815 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 42,032 psi | 65% | 2717 fps | 97.3% |
| ADI AR 2213 | <<locked>> | 82% | 40,248 psi | 62% | 2703 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 90% | 39,262 psi | 60% | 2671 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 86% | 31,140 psi | 48% | 2507 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,438 psi | 65% | 2717 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,167 psi | 74% | 2844 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,047 psi | 65% | 2707 fps | 97.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,956 psi | 58% | 2651 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,680 psi | 56% | 2615 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,734 psi | 49% | 2526 fps | 97.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,930 psi | 63% | 2759 fps | 99.8% |
| Alliant Reloder-33 | <<locked>> | 98% | 48,965 psi | 75% | 2913 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 51,430 psi | 79% | 2851 fps | 95.8% |
| Bofors RP15 | <<locked>> | 82% | 37,782 psi | 58% | 2644 fps | 95.9% |
| Bofors RP30 | <<locked>> | 88% | 38,682 psi | 60% | 2684 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 37,956 psi | 58% | 2651 fps | 96.1% |
| Bofors RP7 | <<locked>> | 80% | 52,373 psi | 81% | 2838 fps | 99.7% |
| Hodgdon H1000 | 81.6 gr | 86% | 37,347 psi | 57% | 2628 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 52,141 psi | 80% | 2887 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 54,259 psi | 84% | 2900 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 82% | 42,975 psi | 66% | 2710 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 82% | 42,206 psi | 65% | 2694 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,397 psi | 70% | 2723 fps | 100% |
| Hodgdon Retumbo | 79.4 gr | 84% | 35,534 psi | 55% | 2671 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 52,576 psi | 81% | 2917 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,847 psi | 43% | 1713 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,790 psi | 74% | 2769 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,708 psi | 83% | 2861 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 47,819 psi | 74% | 2782 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,568 psi | 64% | 2654 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 84% | 41,669 psi | 64% | 2743 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 96% | 39,566 psi | 61% | 2717 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 51,358 psi | 79% | 2815 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,777 psi | 77% | 2805 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 32,677 psi | 50% | 2464 fps | 96.8% |
| Norma 204 | <<locked>> | 80% | 48,211 psi | 74% | 2812 fps | 98.5% |
| Norma 217 | <<locked>> | 90% | 32,242 psi | 50% | 2562 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 40,132 psi | 62% | 2723 fps | 98.1% |
| Norma URP | <<locked>> | 80% | 49,255 psi | 76% | 2825 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 38,711 psi | 60% | 2687 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 48,167 psi | 74% | 2818 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 34,592 psi | 53% | 2562 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,749 psi | 78% | 2858 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,037 psi | 75% | 2877 fps | 100% |
| ReloadSwiss RS 76 | 82.9 gr | 82% | 32,387 psi | 50% | 2572 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 42,902 psi | 66% | 2795 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 43,105 psi | 66% | 2690 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 80% | 41,437 psi | 64% | 2694 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 80% | 52,373 psi | 81% | 2838 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,358 psi | 79% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,777 psi | 77% | 2805 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,357 psi | 78% | 2762 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,104 psi | 63% | 2690 fps | 97.2% |
| Somchem S361 | <<locked>> | 80% | 44,135 psi | 68% | 2677 fps | 96% |
| Somchem S365 | <<locked>> | 80% | 46,630 psi | 72% | 2779 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,003 psi | 65% | 2677 fps | 98.2% |
| Vihtavuori N150 | <<locked>> | 80% | 54,592 psi | 84% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,676 psi | 78% | 2815 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,521 psi | 56% | 2549 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 80% | 50,053 psi | 77% | 2818 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,915 psi | 63% | 2690 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 42,960 psi | 66% | 2772 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 86% | 40,698 psi | 63% | 2703 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 92% | 44,077 psi | 68% | 2812 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 98% | 51,880 psi | 80% | 2992 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,082 psi | 77% | 2766 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,141 psi | 80% | 2887 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,402 psi | 51% | 2641 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,537 psi | 59% | 2602 fps | 96.3% |
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 73 powders for .300 Rem. Ultra Mag. loaded with the .308 | 168gr | Nosler Ballistic Tip Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,114 fps; across all powders the maximum-charge window runs from 1,909 fps to 3,114 fps. ADI AR 2217 gives the best case fill at 100 %, and 73 of the 73 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 168.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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 H1000, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 168gr | Nosler Ballistic Tip Hunting 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.