Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .311 | 155gr | Frontier FBSP bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Ramshot Grand and Alliant Reloder-26.
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>> | 94% | 57,159 psi | 88% | 2999 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 58,015 psi | 89% | 3041 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 56,072 psi | 86% | 3091 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 82% | 58,102 psi | 89% | 3002 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 55,230 psi | 85% | 3038 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 94% | 56,985 psi | 88% | 3094 fps | 98.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,343 psi | 79% | 2986 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,992 psi | 71% | 2943 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 55,361 psi | 85% | 3031 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 58,726 psi | 90% | 3097 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,173 psi | 86% | 3054 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 58,537 psi | 90% | 3081 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 57,145 psi | 88% | 3091 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 58,247 psi | 90% | 3061 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 58,102 psi | 89% | 3120 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 55,201 psi | 85% | 3094 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 58,624 psi | 90% | 3045 fps | 96.5% |
| Bofors RP15 | <<locked>> | 96% | 56,086 psi | 86% | 3074 fps | 99.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 54,027 psi | 83% | 3061 fps | 98.7% |
| Bofors RP5 | <<locked>> | 94% | 57,145 psi | 88% | 3091 fps | 99.5% |
| Bofors RP7 | <<locked>> | 84% | 56,217 psi | 87% | 2986 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,768 psi | 87% | 3077 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 84% | 55,825 psi | 86% | 3035 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 58,276 psi | 90% | 3051 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 92% | 56,623 psi | 87% | 3028 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,564 psi | 86% | 3012 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,361 psi | 85% | 2966 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,913 psi | 88% | 3196 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 56,681 psi | 87% | 3068 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,985 psi | 57% | 1972 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 58,131 psi | 89% | 3022 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,638 psi | 89% | 3012 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 58,233 psi | 90% | 3028 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,493 psi | 88% | 3015 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 94% | 54,795 psi | 84% | 3071 fps | 98.4% |
| Lovex S065 | <<locked>> | 86% | 58,523 psi | 90% | 3009 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,637 psi | 87% | 3002 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 58,218 psi | 90% | 3012 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,593 psi | 86% | 3022 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 41,611 psi | 64% | 2867 fps | 97.9% |
| Norma MRP | <<locked>> | 92% | 57,188 psi | 88% | 3114 fps | 99.9% |
| Norma URP | <<locked>> | 86% | 56,144 psi | 86% | 3022 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 55,738 psi | 86% | 3091 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 86% | 55,245 psi | 85% | 3022 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,317 psi | 84% | 3018 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,782 psi | 58% | 2018 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 58,233 psi | 90% | 3058 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,666 psi | 87% | 3087 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 58,581 psi | 90% | 3189 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,432 psi | 82% | 3068 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 57,522 psi | 89% | 2989 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 56,130 psi | 86% | 3002 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 92% | 57,943 psi | 89% | 3071 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 84% | 56,217 psi | 87% | 2986 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 58,523 psi | 90% | 3009 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,637 psi | 87% | 3002 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,000 psi | 88% | 2861 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,885 psi | 89% | 2959 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,493 psi | 88% | 3064 fps | 99.5% |
| Somchem S355 | <<locked>> | 82% | 57,116 psi | 88% | 2986 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 58,233 psi | 90% | 2992 fps | 98.3% |
| Somchem S365 | <<locked>> | 88% | 56,884 psi | 88% | 3022 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 58,581 psi | 90% | 3041 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 58,624 psi | 90% | 2953 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 58,030 psi | 89% | 3012 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 58,363 psi | 90% | 3018 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 57,232 psi | 88% | 3015 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,695 psi | 87% | 3041 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,811 psi | 87% | 3104 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 98% | 57,043 psi | 88% | 3081 fps | 98.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,983 psi | 83% | 3071 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,986 psi | 89% | 2963 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,028 psi | 86% | 3038 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 57,000 psi | 88% | 3143 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,810 psi | 84% | 2976 fps | 99.1% |
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% | 35,143 psi | 54% | 2602 fps | 96.8% |
| Accurate 4350 | <<locked>> | 80% | 47,021 psi | 72% | 2871 fps | 100% |
| Accurate MAGPRO | 86.9 gr | 88% | 48,385 psi | 74% | 2956 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 54,563 psi | 84% | 2949 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 39,088 psi | 60% | 2733 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 86% | 43,120 psi | 66% | 2841 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 94% | 41,742 psi | 64% | 2795 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 92% | 35,085 psi | 54% | 2687 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,537 psi | 61% | 2736 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,889 psi | 69% | 2877 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,330 psi | 81% | 2999 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,175 psi | 60% | 2730 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 84% | 40,393 psi | 62% | 2785 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,663 psi | 52% | 2631 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 31,430 psi | 48% | 2589 fps | 96% |
| Alliant Reloder-26 | 79.9 gr | 80% | 37,318 psi | 57% | 2769 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,143 psi | 85% | 2989 fps | 95.7% |
| Bofors RP15 | <<locked>> | 86% | 40,016 psi | 62% | 2776 fps | 95.7% |
| Bofors RP30 | <<locked>> | 92% | 40,814 psi | 63% | 2812 fps | 95.4% |
| Bofors RP5 | <<locked>> | 84% | 40,393 psi | 62% | 2785 fps | 96% |
| Bofors RP7 | <<locked>> | 80% | 49,371 psi | 76% | 2874 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 90% | 39,798 psi | 61% | 2759 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 48,733 psi | 75% | 2920 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 50,995 psi | 78% | 2936 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 46,064 psi | 71% | 2848 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 45,223 psi | 70% | 2831 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,322 psi | 65% | 2759 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 37,550 psi | 58% | 2795 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 48,704 psi | 75% | 2936 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,615 psi | 43% | 1772 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,875 psi | 69% | 2802 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,720 psi | 78% | 2900 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 44,599 psi | 69% | 2812 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 44,440 psi | 68% | 2789 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 44,396 psi | 68% | 2881 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 48,370 psi | 74% | 2851 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 46,702 psi | 72% | 2838 fps | 99% |
| Lovex S071 | <<locked>> | 82% | 32,198 psi | 50% | 2526 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 45,063 psi | 69% | 2838 fps | 97.1% |
| Norma 217 | <<locked>> | 96% | 36,114 psi | 56% | 2736 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 36,724 psi | 57% | 2730 fps | 96.2% |
| Norma URP | <<locked>> | 80% | 45,977 psi | 71% | 2858 fps | 99.9% |
| Ramshot Grand | 82.7 gr | 86% | 41,292 psi | 64% | 2822 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 44,889 psi | 69% | 2844 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 36,985 psi | 57% | 2694 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,239 psi | 43% | 1811 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,166 psi | 73% | 2887 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,397 psi | 70% | 2904 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 34,577 psi | 53% | 2703 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 45,469 psi | 70% | 2927 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 53,925 psi | 83% | 2940 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 43,221 psi | 67% | 2772 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 38,566 psi | 59% | 2713 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 49,371 psi | 76% | 2874 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,370 psi | 74% | 2851 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 46,702 psi | 72% | 2838 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,664 psi | 83% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,456 psi | 73% | 2795 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,232 psi | 59% | 2710 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 53,606 psi | 83% | 2933 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 44,251 psi | 68% | 2756 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 43,047 psi | 66% | 2812 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,117 psi | 60% | 2694 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 80% | 51,401 psi | 79% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,413 psi | 73% | 2851 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 36,303 psi | 56% | 2621 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 46,847 psi | 72% | 2851 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 37,869 psi | 58% | 2713 fps | 99.3% |
| Vihtavuori N560 | <<locked>> | 86% | 45,905 psi | 71% | 2913 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 90% | 43,178 psi | 66% | 2835 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 96% | 46,572 psi | 72% | 2940 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,891 psi | 72% | 2805 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,733 psi | 75% | 2920 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,008 psi | 46% | 2638 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 82% | 38,406 psi | 59% | 2674 fps | 95.2% |
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 75 powders for .300 Rem. Ultra Mag. loaded with the .311 | 155gr | Frontier FBSP. Hodgdon Retumbo delivers the highest muzzle velocity at 3,196 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,196 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 155.0 gr projectile in 0.311" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Accurate MAGPRO, Ramshot Grand, Alliant Reloder-26 rank at the top here: for .300 Rem. Ultra Mag. with the .311 | 155gr | Frontier FBSP 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.