Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .311 | 180gr | Norma Semi Soft Point bullet and 68 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 ReloadSwiss RS 80.
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>> | 90% | 57,667 psi | 89% | 2838 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,870 psi | 89% | 2861 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,637 psi | 87% | 2936 fps | 99% |
| ADI AR 2209 | <<locked>> | 86% | 55,100 psi | 85% | 2871 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 90% | 57,261 psi | 88% | 2936 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 98% | 55,782 psi | 86% | 2904 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,504 psi | 81% | 2936 fps | 96.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,259 psi | 84% | 2923 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,274 psi | 85% | 2864 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,274 psi | 85% | 2864 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,201 psi | 85% | 2864 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,523 psi | 90% | 2913 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,638 psi | 89% | 2930 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,550 psi | 85% | 2844 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,637 psi | 86% | 2907 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,246 psi | 87% | 2927 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,972 psi | 89% | 2989 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,146 psi | 89% | 2894 fps | 98.1% |
| Bofors RP15 | <<locked>> | 92% | 56,811 psi | 87% | 2917 fps | 99.9% |
| Bofors RP30 | <<locked>> | 96% | 55,506 psi | 85% | 2917 fps | 99.7% |
| Bofors RP5 | <<locked>> | 90% | 57,638 psi | 89% | 2930 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,392 psi | 88% | 2927 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 56,463 psi | 87% | 2871 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,463 psi | 85% | 2858 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,361 psi | 85% | 2789 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 58,581 psi | 90% | 3045 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 58% | 1860 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,537 psi | 89% | 2848 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,131 psi | 89% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,971 psi | 88% | 2851 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 90% | 55,405 psi | 85% | 2913 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,617 psi | 76% | 2838 fps | 99.1% |
| Lovex S065 | <<locked>> | 82% | 57,624 psi | 89% | 2825 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,202 psi | 86% | 2828 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,448 psi | 85% | 2808 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,114 psi | 85% | 2851 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 50,604 psi | 78% | 2864 fps | 100% |
| Norma MRP | <<locked>> | 88% | 57,769 psi | 89% | 2946 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,057 psi | 86% | 2844 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,768 psi | 87% | 2940 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 55,085 psi | 85% | 2848 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,361 psi | 85% | 2867 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,392 psi | 59% | 1903 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,247 psi | 90% | 2884 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,724 psi | 87% | 2907 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,521 psi | 85% | 2972 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,129 psi | 85% | 2936 fps | 99% |
| Rottweil R 904 | <<locked>> | 86% | 55,840 psi | 86% | 2841 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 58,131 psi | 89% | 2904 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,624 psi | 89% | 2825 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,202 psi | 86% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,681 psi | 87% | 2782 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,725 psi | 89% | 2900 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 57,435 psi | 88% | 2828 fps | 99.3% |
| Somchem S365 | <<locked>> | 84% | 57,392 psi | 88% | 2844 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 58,624 psi | 90% | 2874 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,508 psi | 89% | 2831 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 58,537 psi | 90% | 2858 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 57,798 psi | 89% | 2871 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 82% | 56,782 psi | 87% | 2838 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,421 psi | 88% | 2871 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,246 psi | 88% | 2949 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 94% | 58,030 psi | 89% | 2933 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 96% | 55,637 psi | 86% | 2940 fps | 98.7% |
| Vihtavuori N570 | <<locked>> | 98% | 56,782 psi | 87% | 2999 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,246 psi | 88% | 2782 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,143 psi | 85% | 2927 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 58,581 psi | 90% | 2871 fps | 100% |
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% | 40,944 psi | 63% | 2572 fps | 99.5% |
| Accurate 4350 | <<locked>> | 80% | 54,070 psi | 83% | 2808 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 42,351 psi | 65% | 2684 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 44,933 psi | 69% | 2700 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 80% | 40,205 psi | 62% | 2631 fps | 96.3% |
| ADI AR 2217 | <<locked>> | 86% | 36,869 psi | 57% | 2552 fps | 95.5% |
| ADI AR 2218 | <<locked>> | 98% | 48,646 psi | 75% | 2861 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 82% | 29,399 psi | 45% | 2398 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,324 psi | 70% | 2700 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,324 psi | 70% | 2700 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,561 psi | 79% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,904 psi | 69% | 2694 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,843 psi | 63% | 2641 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,697 psi | 61% | 2595 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,229 psi | 53% | 2523 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,657 psi | 69% | 2749 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,079 psi | 71% | 2789 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,877 psi | 74% | 2723 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 38,072 psi | 59% | 2579 fps | 96.8% |
| Bofors RP30 | <<locked>> | 84% | 36,564 psi | 56% | 2566 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 40,843 psi | 63% | 2641 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 82% | 34,940 psi | 54% | 2510 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 80% | 42,815 psi | 66% | 2638 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,061 psi | 65% | 2621 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,530 psi | 75% | 2694 fps | 100% |
| Hodgdon Retumbo | 76.8 gr | 80% | 33,359 psi | 51% | 2546 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,036 psi | 43% | 1667 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,604 psi | 78% | 2743 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 50,995 psi | 78% | 2749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,063 psi | 68% | 2635 fps | 97% |
| IMR 7828 SSC | <<locked>> | 80% | 38,899 psi | 60% | 2615 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 92% | 37,652 psi | 58% | 2605 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 54,273 psi | 84% | 2779 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,707 psi | 81% | 2776 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,273 psi | 54% | 2454 fps | 98.4% |
| Norma 204 | <<locked>> | 80% | 51,401 psi | 79% | 2792 fps | 99.4% |
| Norma 217 | <<locked>> | 86% | 30,734 psi | 47% | 2454 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 43,337 psi | 67% | 2710 fps | 99.3% |
| Norma URP | <<locked>> | 80% | 52,489 psi | 81% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,885 psi | 60% | 2621 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 80% | 51,445 psi | 79% | 2795 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,983 psi | 54% | 2507 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,747 psi | 44% | 1706 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,360 psi | 84% | 2831 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,794 psi | 81% | 2854 fps | 100% |
| ReloadSwiss RS 76 | 82.2 gr | 80% | 32,648 psi | 50% | 2520 fps | 96.9% |
| ReloadSwiss RS 80 | 91.2 gr | 88% | 40,350 psi | 62% | 2671 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 45,818 psi | 71% | 2677 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 80% | 44,382 psi | 68% | 2680 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,273 psi | 84% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,707 psi | 81% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,127 psi | 82% | 2733 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,034 psi | 68% | 2677 fps | 98.6% |
| Somchem S361 | <<locked>> | 80% | 46,905 psi | 72% | 2661 fps | 97.6% |
| Somchem S365 | <<locked>> | 80% | 50,067 psi | 77% | 2746 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,860 psi | 69% | 2657 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 80% | 53,867 psi | 83% | 2782 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,131 psi | 60% | 2539 fps | 97.9% |
| Vihtavuori N170 | <<locked>> | 94% | 53,954 psi | 83% | 2812 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 53,316 psi | 82% | 2789 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,077 psi | 68% | 2671 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,120 psi | 66% | 2703 fps | 96.7% |
| Vihtavuori N565 | <<locked>> | 82% | 38,392 psi | 59% | 2585 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 88% | 41,597 psi | 64% | 2690 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 94% | 49,008 psi | 75% | 2864 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,301 psi | 82% | 2730 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,217 psi | 57% | 2641 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,394 psi | 64% | 2592 fps | 97.9% |
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 68 powders for .300 Rem. Ultra Mag. loaded with the .311 | 180gr | Norma Semi Soft Point. Hodgdon Retumbo delivers the highest muzzle velocity at 3,045 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,045 fps. ADI AR 2218 gives the best case fill at 100 %, and 68 of the 68 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 1:14.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, 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, ReloadSwiss RS 80 rank at the top here: for .300 Rem. Ultra Mag. with the .311 | 180gr | Norma Semi Soft Point 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.