Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 180gr | Norma Bondstrike bullet and 71 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% | 55,651 psi | 86% | 2808 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,101 psi | 86% | 2838 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 57,392 psi | 88% | 2959 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 90% | 58,363 psi | 90% | 2963 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 88% | 57,058 psi | 88% | 2897 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 55,230 psi | 85% | 2904 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 57,421 psi | 88% | 2927 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,112 psi | 80% | 2894 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,087 psi | 88% | 2890 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 56,550 psi | 87% | 2884 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 55,637 psi | 86% | 2900 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 57,246 psi | 88% | 2867 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 57,290 psi | 88% | 2933 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 58,030 psi | 89% | 2953 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 55,259 psi | 85% | 2949 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,289 psi | 87% | 2861 fps | 97.6% |
| Bofors RP15 | <<locked>> | 94% | 58,494 psi | 90% | 2943 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 57,058 psi | 88% | 2940 fps | 99.8% |
| Bofors RP5 | <<locked>> | 90% | 55,637 psi | 86% | 2900 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 57,479 psi | 88% | 2838 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 55,158 psi | 85% | 2894 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 57,551 psi | 89% | 2887 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 58,494 psi | 90% | 2897 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 57,450 psi | 88% | 2881 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,348 psi | 88% | 2812 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 56,028 psi | 86% | 3009 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 58,479 psi | 90% | 2923 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,362 psi | 57% | 1847 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,927 psi | 86% | 2825 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 58,769 psi | 90% | 2858 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 56,347 psi | 87% | 2828 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,390 psi | 85% | 2825 fps | 99% |
| IMR 7828 SSC | <<locked>> | 92% | 57,290 psi | 88% | 2943 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,413 psi | 73% | 2802 fps | 98.6% |
| Lovex S065 | <<locked>> | 82% | 56,115 psi | 86% | 2802 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 58,204 psi | 90% | 2854 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,087 psi | 88% | 2828 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,246 psi | 88% | 2877 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 48,051 psi | 74% | 2828 fps | 99.9% |
| Norma MRP | <<locked>> | 88% | 55,709 psi | 86% | 2920 fps | 100% |
| Norma URP | <<locked>> | 84% | 58,015 psi | 89% | 2871 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 58,610 psi | 90% | 2966 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 57,072 psi | 88% | 2874 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 57,145 psi | 88% | 2894 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,247 psi | 59% | 1890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,260 psi | 87% | 2854 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 54,723 psi | 84% | 2881 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 57,246 psi | 88% | 3002 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 56,753 psi | 87% | 2963 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 88% | 57,812 psi | 89% | 2867 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 56,246 psi | 87% | 2874 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 57,479 psi | 88% | 2838 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,115 psi | 86% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 58,204 psi | 90% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,129 psi | 85% | 2756 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 55,840 psi | 86% | 2874 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 55,753 psi | 86% | 2802 fps | 99% |
| Somchem S365 | <<locked>> | 84% | 55,448 psi | 85% | 2822 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 56,681 psi | 87% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,941 psi | 86% | 2808 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 56,492 psi | 87% | 2828 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 55,129 psi | 85% | 2812 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,434 psi | 85% | 2844 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,230 psi | 85% | 2917 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 94% | 55,941 psi | 86% | 2904 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 98% | 57,130 psi | 88% | 2963 fps | 98.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 58,363 psi | 90% | 3022 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,535 psi | 85% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 57,551 psi | 89% | 2887 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 56,579 psi | 87% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 56,724 psi | 87% | 2844 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% | 39,494 psi | 61% | 2546 fps | 99.2% |
| Accurate 4350 | <<locked>> | 80% | 52,315 psi | 81% | 2785 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,062 psi | 66% | 2713 fps | 97.2% |
| Accurate MAGPRO | <<locked>> | 80% | 40,770 psi | 63% | 2654 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 43,439 psi | 67% | 2671 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 80% | 38,856 psi | 60% | 2602 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 88% | 37,942 psi | 58% | 2575 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 84% | 30,168 psi | 46% | 2421 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,980 psi | 77% | 2789 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,468 psi | 67% | 2664 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,421 psi | 61% | 2615 fps | 97.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,130 psi | 59% | 2569 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,924 psi | 51% | 2490 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,859 psi | 66% | 2720 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 47,427 psi | 73% | 2818 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 46,543 psi | 72% | 2694 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 36,680 psi | 56% | 2552 fps | 96.2% |
| Bofors RP30 | <<locked>> | 86% | 37,666 psi | 58% | 2592 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 39,421 psi | 61% | 2615 fps | 97.3% |
| Bofors RP7 | <<locked>> | 80% | 53,766 psi | 83% | 2782 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 36,158 psi | 56% | 2536 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 53,838 psi | 83% | 2835 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 41,452 psi | 64% | 2608 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,712 psi | 63% | 2595 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,007 psi | 72% | 2667 fps | 100% |
| Hodgdon Retumbo | 76.4 gr | 82% | 34,461 psi | 53% | 2579 fps | 96.3% |
| Hodgdon Superformance | <<locked>> | 80% | 54,433 psi | 84% | 2864 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,065 psi | 43% | 1660 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,182 psi | 76% | 2720 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 55,071 psi | 85% | 2802 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 49,385 psi | 76% | 2726 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,815 psi | 66% | 2608 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 80% | 37,521 psi | 58% | 2582 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 92% | 35,955 psi | 55% | 2569 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 52,750 psi | 81% | 2756 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,184 psi | 79% | 2749 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 33,997 psi | 52% | 2428 fps | 97.9% |
| Norma 204 | <<locked>> | 80% | 49,792 psi | 77% | 2762 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 31,488 psi | 48% | 2477 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 41,655 psi | 64% | 2680 fps | 99% |
| Norma URP | <<locked>> | 80% | 50,821 psi | 78% | 2766 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,333 psi | 57% | 2589 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 49,763 psi | 77% | 2769 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,460 psi | 51% | 2470 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,776 psi | 44% | 1699 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,576 psi | 81% | 2805 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 50,966 psi | 78% | 2825 fps | 100% |
| ReloadSwiss RS 76 | 79.8 gr | 80% | 31,430 psi | 48% | 2484 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 41,597 psi | 64% | 2700 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 44,556 psi | 69% | 2648 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 43,033 psi | 66% | 2654 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% | 51,184 psi | 79% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,735 psi | 80% | 2707 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,685 psi | 66% | 2651 fps | 98.1% |
| Somchem S361 | <<locked>> | 80% | 45,585 psi | 70% | 2635 fps | 97.1% |
| Somchem S365 | <<locked>> | 80% | 48,327 psi | 74% | 2723 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,468 psi | 67% | 2631 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 80% | 52,272 psi | 80% | 2759 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,811 psi | 58% | 2510 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 80% | 51,619 psi | 79% | 2762 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,627 psi | 66% | 2644 fps | 100% |
| Vihtavuori N560 | 77.3 gr | 80% | 41,524 psi | 64% | 2671 fps | 96.1% |
| Vihtavuori N565 | <<locked>> | 84% | 39,465 psi | 61% | 2608 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 90% | 42,786 psi | 66% | 2717 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 96% | 50,314 psi | 77% | 2890 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 51,808 psi | 80% | 2710 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,838 psi | 83% | 2835 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,273 psi | 54% | 2605 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,914 psi | 61% | 2559 fps | 97.4% |
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 71 powders for .300 Rem. Ultra Mag. loaded with the .308 | 180gr | Norma Bondstrike. Vihtavuori N570 delivers the highest muzzle velocity at 3,022 fps; across all powders the maximum-charge window runs from 1,847 fps to 3,022 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 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 180.0 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 Retumbo, ReloadSwiss RS 76, Vihtavuori N560 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 180gr | Norma Bondstrike 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.