Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .311 | 180gr | Sellier & Bellot FMJ 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% | 56,565 psi | 87% | 2822 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,971 psi | 88% | 2851 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 55,347 psi | 85% | 2917 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 88% | 57,972 psi | 89% | 2910 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 56,144 psi | 86% | 2920 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 58,624 psi | 90% | 2946 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 51,184 psi | 79% | 2910 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,069 psi | 82% | 2907 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 58,073 psi | 89% | 2907 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,928 psi | 89% | 2904 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,421 psi | 88% | 2897 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,536 psi | 87% | 2917 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 58,175 psi | 90% | 2877 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 58,421 psi | 90% | 2946 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,984 psi | 85% | 2910 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,623 psi | 87% | 2969 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,130 psi | 88% | 2877 fps | 97.8% |
| Bofors RP15 | <<locked>> | 92% | 55,869 psi | 86% | 2904 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 58,146 psi | 89% | 2956 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 56,536 psi | 87% | 2917 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 58,204 psi | 90% | 2851 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 56,144 psi | 86% | 2910 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 58,320 psi | 90% | 2900 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 55,593 psi | 86% | 2854 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,262 psi | 90% | 2894 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,131 psi | 89% | 2822 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,145 psi | 88% | 3025 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,478 psi | 58% | 1854 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,579 psi | 87% | 2835 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,319 psi | 88% | 2841 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,173 psi | 86% | 2838 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 92% | 58,421 psi | 90% | 2959 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,573 psi | 75% | 2822 fps | 98.9% |
| Lovex S065 | <<locked>> | 82% | 56,855 psi | 88% | 2815 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,390 psi | 85% | 2815 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,957 psi | 89% | 2841 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,943 psi | 89% | 2890 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 49,313 psi | 76% | 2848 fps | 99.9% |
| Norma MRP | <<locked>> | 88% | 56,608 psi | 87% | 2930 fps | 100% |
| Norma URP | <<locked>> | 84% | 58,798 psi | 90% | 2881 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,535 psi | 85% | 2920 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 57,783 psi | 89% | 2887 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 58,407 psi | 90% | 2910 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,363 psi | 59% | 1896 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,232 psi | 88% | 2867 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,709 psi | 86% | 2894 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 58,537 psi | 90% | 3018 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 57,928 psi | 89% | 2979 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 88% | 58,668 psi | 90% | 2881 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 57,174 psi | 88% | 2890 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 58,204 psi | 90% | 2851 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,855 psi | 88% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,390 psi | 85% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,970 psi | 86% | 2769 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,768 psi | 87% | 2887 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 56,478 psi | 87% | 2815 fps | 99.1% |
| Somchem S365 | <<locked>> | 84% | 56,275 psi | 87% | 2831 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,551 psi | 89% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,695 psi | 87% | 2822 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,479 psi | 88% | 2841 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 56,739 psi | 87% | 2854 fps | 96% |
| Vihtavuori N550 | <<locked>> | 82% | 56,043 psi | 86% | 2825 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,376 psi | 87% | 2858 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,115 psi | 86% | 2930 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 94% | 56,971 psi | 88% | 2920 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 98% | 58,349 psi | 90% | 2982 fps | 99% |
| Vihtavuori N570 | <<locked>> | 98% | 55,332 psi | 85% | 2972 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,362 psi | 87% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 58,523 psi | 90% | 2904 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,928 psi | 89% | 2963 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,537 psi | 89% | 2854 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% | 40,205 psi | 62% | 2559 fps | 99.3% |
| Accurate 4350 | <<locked>> | 80% | 53,113 psi | 82% | 2795 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 41,611 psi | 64% | 2671 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 44,164 psi | 68% | 2684 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 39,523 psi | 61% | 2618 fps | 96% |
| ADI AR 2217 | <<locked>> | 86% | 36,158 psi | 56% | 2536 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 98% | 47,543 psi | 73% | 2838 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 84% | 30,763 psi | 47% | 2438 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,527 psi | 69% | 2687 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,633 psi | 78% | 2799 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,164 psi | 68% | 2680 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,118 psi | 62% | 2628 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,899 psi | 60% | 2582 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,547 psi | 52% | 2507 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,830 psi | 67% | 2736 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 48,472 psi | 75% | 2835 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,094 psi | 72% | 2707 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 37,333 psi | 57% | 2566 fps | 96.5% |
| Bofors RP30 | <<locked>> | 84% | 35,839 psi | 55% | 2552 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 40,118 psi | 62% | 2628 fps | 97.6% |
| Bofors RP7 | <<locked>> | 80% | 54,476 psi | 84% | 2795 fps | 100% |
| Hodgdon H1000 | <<locked>> | 84% | 36,709 psi | 56% | 2552 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 80% | 54,592 psi | 84% | 2848 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 42,134 psi | 65% | 2625 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,365 psi | 64% | 2608 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,819 psi | 74% | 2680 fps | 100% |
| Hodgdon Retumbo | 75.6 gr | 80% | 32,721 psi | 50% | 2530 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,007 psi | 43% | 1663 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,864 psi | 77% | 2733 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 50,169 psi | 77% | 2740 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,395 psi | 67% | 2621 fps | 96.7% |
| IMR 7828 SSC | <<locked>> | 80% | 38,189 psi | 59% | 2598 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 92% | 36,709 psi | 56% | 2585 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 53,461 psi | 82% | 2766 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,909 psi | 80% | 2762 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,534 psi | 53% | 2441 fps | 98.1% |
| Norma 204 | <<locked>> | 80% | 50,662 psi | 78% | 2779 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 32,213 psi | 50% | 2497 fps | 96% |
| Norma MRP | <<locked>> | 80% | 42,525 psi | 65% | 2697 fps | 99.1% |
| Norma URP | <<locked>> | 80% | 51,634 psi | 79% | 2779 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,000 psi | 58% | 2602 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 50,691 psi | 78% | 2782 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,214 psi | 53% | 2487 fps | 96.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,718 psi | 44% | 1703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,345 psi | 82% | 2815 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,750 psi | 80% | 2838 fps | 100% |
| ReloadSwiss RS 76 | 80.9 gr | 80% | 31,937 psi | 49% | 2500 fps | 96.5% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 39,262 psi | 60% | 2648 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 45,078 psi | 69% | 2661 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 80% | 43,598 psi | 67% | 2664 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 80% | 54,476 psi | 84% | 2795 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,461 psi | 82% | 2766 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,909 psi | 80% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,388 psi | 81% | 2720 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,250 psi | 67% | 2661 fps | 98.3% |
| Somchem S361 | <<locked>> | 80% | 46,166 psi | 71% | 2648 fps | 97.3% |
| Somchem S365 | <<locked>> | 80% | 49,153 psi | 76% | 2733 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,150 psi | 68% | 2644 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 80% | 53,040 psi | 82% | 2769 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,450 psi | 59% | 2523 fps | 97.6% |
| Vihtavuori N170 | <<locked>> | 94% | 52,866 psi | 81% | 2792 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 52,330 psi | 81% | 2772 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,250 psi | 67% | 2654 fps | 100% |
| Vihtavuori N560 | 78.5 gr | 80% | 42,351 psi | 65% | 2687 fps | 96.4% |
| Vihtavuori N565 | <<locked>> | 82% | 37,579 psi | 58% | 2566 fps | 95% |
| Vihtavuori N568 | <<locked>> | 90% | 43,743 psi | 67% | 2733 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 94% | 47,790 psi | 74% | 2844 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,475 psi | 81% | 2720 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 54,781 psi | 84% | 2851 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,289 psi | 56% | 2625 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,567 psi | 62% | 2575 fps | 97.6% |
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 .311 | 180gr | Sellier & Bellot FMJ. Hodgdon Retumbo delivers the highest muzzle velocity at 3,025 fps; across all powders the maximum-charge window runs from 1,854 fps to 3,025 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 58–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.311" calls for a 1:13.0 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 .311 | 180gr | Sellier & Bellot FMJ 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.