Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 180gr | Nosler Ballistic Silver Tip bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 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>> | 90% | 55,434 psi | 85% | 2805 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 55,898 psi | 86% | 2835 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 58,378 psi | 90% | 2963 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 88% | 56,898 psi | 88% | 2894 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 55,027 psi | 85% | 2900 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 57,246 psi | 88% | 2923 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 51,938 psi | 80% | 2890 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,869 psi | 88% | 2887 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,550 psi | 87% | 2884 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 55,434 psi | 85% | 2897 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,029 psi | 88% | 2864 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 57,145 psi | 88% | 2930 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 58,044 psi | 89% | 2953 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 55,114 psi | 85% | 2949 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,188 psi | 86% | 2861 fps | 97.5% |
| Bofors RP15 | <<locked>> | 94% | 58,508 psi | 90% | 2943 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 56,869 psi | 88% | 2936 fps | 99.8% |
| Bofors RP5 | <<locked>> | 90% | 55,434 psi | 85% | 2897 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 57,246 psi | 88% | 2835 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 54,984 psi | 85% | 2894 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 57,377 psi | 88% | 2887 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 58,508 psi | 90% | 2897 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,261 psi | 88% | 2881 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,130 psi | 88% | 2808 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 55,825 psi | 86% | 3005 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 58,305 psi | 90% | 2920 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 58% | 1847 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,724 psi | 86% | 2822 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 58,581 psi | 90% | 2854 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 56,362 psi | 87% | 2828 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,201 psi | 85% | 2822 fps | 99% |
| IMR 7828 SSC | <<locked>> | 92% | 57,072 psi | 88% | 2940 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,224 psi | 73% | 2799 fps | 98.6% |
| Lovex S065 | <<locked>> | 82% | 56,130 psi | 86% | 2802 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,001 psi | 89% | 2851 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,898 psi | 88% | 2828 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,087 psi | 88% | 2877 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 47,863 psi | 74% | 2825 fps | 99.8% |
| Norma MRP | <<locked>> | 88% | 55,506 psi | 85% | 2917 fps | 100% |
| Norma URP | <<locked>> | 84% | 57,812 psi | 89% | 2867 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 58,392 psi | 90% | 2959 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 56,913 psi | 88% | 2874 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 56,956 psi | 88% | 2890 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,363 psi | 59% | 1893 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,086 psi | 86% | 2854 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 58,697 psi | 90% | 2933 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 57,072 psi | 88% | 2999 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,594 psi | 87% | 2959 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 88% | 57,653 psi | 89% | 2864 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 56,043 psi | 86% | 2871 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 57,246 psi | 88% | 2835 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,130 psi | 86% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,001 psi | 89% | 2851 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 58,740 psi | 90% | 2805 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,637 psi | 86% | 2871 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 55,608 psi | 86% | 2799 fps | 98.9% |
| Somchem S365 | <<locked>> | 84% | 55,201 psi | 85% | 2818 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,507 psi | 87% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,709 psi | 86% | 2805 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,507 psi | 87% | 2828 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 58,682 psi | 90% | 2861 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,419 psi | 85% | 2844 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,027 psi | 85% | 2913 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 94% | 55,782 psi | 86% | 2900 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 98% | 56,971 psi | 88% | 2959 fps | 98.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 58,189 psi | 90% | 3018 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,390 psi | 85% | 2756 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,595 psi | 89% | 2887 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 56,347 psi | 87% | 2946 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,521 psi | 87% | 2841 fps | 99.9% |
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% | 39,479 psi | 61% | 2546 fps | 99.2% |
| Accurate 4350 | <<locked>> | 80% | 52,301 psi | 80% | 2785 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 40,625 psi | 63% | 2648 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 43,424 psi | 67% | 2671 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 80% | 38,856 psi | 60% | 2605 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 88% | 37,942 psi | 58% | 2575 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 84% | 30,153 psi | 46% | 2421 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,763 psi | 77% | 2785 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,439 psi | 67% | 2664 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,392 psi | 61% | 2612 fps | 97.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,116 psi | 59% | 2569 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,924 psi | 51% | 2490 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,699 psi | 66% | 2717 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 47,282 psi | 73% | 2815 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 46,398 psi | 71% | 2690 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 36,651 psi | 56% | 2549 fps | 96.2% |
| Bofors RP30 | <<locked>> | 86% | 37,507 psi | 58% | 2589 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 39,392 psi | 61% | 2612 fps | 97.3% |
| Bofors RP7 | <<locked>> | 80% | 53,766 psi | 83% | 2782 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 36,042 psi | 55% | 2533 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 53,650 psi | 83% | 2831 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 41,307 psi | 64% | 2605 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,698 psi | 63% | 2592 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 46,847 psi | 72% | 2664 fps | 100% |
| Hodgdon Retumbo | 76.2 gr | 82% | 34,330 psi | 53% | 2572 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 80% | 54,230 psi | 83% | 2861 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,992 psi | 43% | 1657 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,168 psi | 76% | 2720 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 55,071 psi | 85% | 2802 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 49,371 psi | 76% | 2726 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,786 psi | 66% | 2605 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 80% | 37,507 psi | 58% | 2579 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 92% | 35,839 psi | 55% | 2566 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 52,750 psi | 81% | 2756 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,169 psi | 79% | 2749 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,852 psi | 52% | 2425 fps | 97.8% |
| Norma 204 | <<locked>> | 80% | 49,777 psi | 77% | 2762 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 31,357 psi | 48% | 2474 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 41,626 psi | 64% | 2680 fps | 98.9% |
| Norma URP | <<locked>> | 80% | 50,821 psi | 78% | 2766 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,173 psi | 57% | 2582 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 49,777 psi | 77% | 2769 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,460 psi | 51% | 2470 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,703 psi | 44% | 1696 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,388 psi | 81% | 2802 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,807 psi | 78% | 2825 fps | 100% |
| ReloadSwiss RS 76 | 79.6 gr | 80% | 31,314 psi | 48% | 2480 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 41,452 psi | 64% | 2697 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 44,425 psi | 68% | 2644 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 80% | 42,844 psi | 66% | 2651 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 80% | 53,766 psi | 83% | 2782 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,750 psi | 81% | 2756 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,169 psi | 79% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,561 psi | 79% | 2703 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,511 psi | 65% | 2644 fps | 98.1% |
| Somchem S361 | <<locked>> | 80% | 45,440 psi | 70% | 2631 fps | 97% |
| Somchem S365 | <<locked>> | 80% | 48,283 psi | 74% | 2720 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,453 psi | 67% | 2631 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 80% | 52,243 psi | 80% | 2759 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,797 psi | 58% | 2510 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 80% | 51,590 psi | 79% | 2759 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,424 psi | 65% | 2641 fps | 100% |
| Vihtavuori N560 | 77.2 gr | 80% | 41,510 psi | 64% | 2671 fps | 96% |
| Vihtavuori N565 | <<locked>> | 84% | 39,465 psi | 61% | 2608 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 90% | 42,641 psi | 66% | 2710 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 96% | 50,140 psi | 77% | 2887 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,634 psi | 79% | 2710 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,838 psi | 83% | 2835 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,215 psi | 54% | 2605 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,755 psi | 61% | 2559 fps | 97.3% |
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 77 powders for .300 Rem. Ultra Mag. loaded with the .308 | 180gr | Nosler Ballistic Silver Tip. Vihtavuori N570 delivers the highest muzzle velocity at 3,018 fps; across all powders the maximum-charge window runs from 1,847 fps to 3,018 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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 Retumbo, ReloadSwiss RS 76, Vihtavuori N560 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 180gr | Nosler Ballistic Silver Tip they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-50, IMR 7977 Enduron, Lovex D100 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.