Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 180gr | CutEdge LZR MAX GEN2 bullet and 74 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.
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>> | 92% | 55,637 psi | 86% | 2812 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,333 psi | 87% | 2841 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 57,595 psi | 89% | 2966 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 58,798 psi | 90% | 2969 fps | 99% |
| ADI AR 2209 | <<locked>> | 90% | 57,580 psi | 89% | 2904 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 55,767 psi | 86% | 2913 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,925 psi | 83% | 2877 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,254 psi | 74% | 2831 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,885 psi | 89% | 2900 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,667 psi | 89% | 2900 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,203 psi | 88% | 2894 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,912 psi | 86% | 2907 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,217 psi | 88% | 2871 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,232 psi | 88% | 2936 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 58,146 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 50,807 psi | 78% | 2881 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,043 psi | 88% | 2871 fps | 97.5% |
| Bofors RP15 | <<locked>> | 96% | 58,726 psi | 90% | 2946 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,782 psi | 87% | 2940 fps | 99.7% |
| Bofors RP5 | <<locked>> | 92% | 55,912 psi | 86% | 2907 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 58,175 psi | 90% | 2844 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 55,477 psi | 85% | 2900 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 84% | 58,233 psi | 90% | 2900 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,724 psi | 87% | 2858 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 55,332 psi | 85% | 2851 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 58,146 psi | 89% | 2890 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,754 psi | 89% | 2818 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,941 psi | 86% | 3012 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,071 psi | 85% | 2877 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,188 psi | 57% | 1834 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,724 psi | 87% | 2835 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,043 psi | 86% | 2818 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 56,797 psi | 87% | 2835 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,970 psi | 86% | 2831 fps | 99% |
| IMR 7828 SSC | <<locked>> | 94% | 57,624 psi | 89% | 2946 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,642 psi | 67% | 2740 fps | 97.6% |
| Lovex S065 | <<locked>> | 84% | 56,869 psi | 88% | 2815 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,129 psi | 85% | 2812 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 56,971 psi | 88% | 2831 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,986 psi | 89% | 2890 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 43,990 psi | 68% | 2762 fps | 99.4% |
| Norma MRP | <<locked>> | 90% | 55,854 psi | 86% | 2923 fps | 100% |
| Norma URP | <<locked>> | 86% | 58,653 psi | 90% | 2881 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,433 psi | 84% | 2907 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 57,624 psi | 89% | 2884 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,334 psi | 88% | 2897 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,869 psi | 58% | 1877 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,681 psi | 87% | 2864 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,303 psi | 85% | 2890 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,203 psi | 88% | 3005 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,420 psi | 87% | 2959 fps | 99% |
| Rottweil R 904 | <<locked>> | 90% | 58,450 psi | 90% | 2874 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 90% | 56,739 psi | 87% | 2884 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 58,175 psi | 90% | 2844 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,869 psi | 88% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,129 psi | 85% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,028 psi | 86% | 2769 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,318 psi | 87% | 2881 fps | 99.8% |
| Somchem S361 | <<locked>> | 88% | 56,405 psi | 87% | 2808 fps | 98.9% |
| Somchem S365 | <<locked>> | 86% | 55,724 psi | 86% | 2828 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,942 psi | 88% | 2851 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 56,840 psi | 87% | 2753 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,507 psi | 87% | 2818 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,014 psi | 88% | 2835 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 55,637 psi | 86% | 2822 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,419 psi | 85% | 2851 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,550 psi | 85% | 2923 fps | 99% |
| Vihtavuori N565 | <<locked>> | 96% | 55,753 psi | 86% | 2904 fps | 99.2% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,072 psi | 88% | 2966 fps | 98.7% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,867 psi | 83% | 2953 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,217 psi | 87% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 58,233 psi | 90% | 2900 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,246 psi | 87% | 2953 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,130 psi | 88% | 2851 fps | 99.8% |
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% | 36,434 psi | 56% | 2487 fps | 98.4% |
| Accurate 4350 | <<locked>> | 80% | 48,878 psi | 75% | 2736 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 39,958 psi | 61% | 2654 fps | 96.1% |
| Accurate MAGPRO | <<locked>> | 84% | 43,743 psi | 67% | 2717 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 40,756 psi | 63% | 2621 fps | 97.3% |
| ADI AR 2213 | <<locked>> | 82% | 39,030 psi | 60% | 2608 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 90% | 37,898 psi | 58% | 2575 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 88% | 31,894 psi | 49% | 2474 fps | 96.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,191 psi | 63% | 2621 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,094 psi | 72% | 2746 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,814 psi | 63% | 2615 fps | 97.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,637 psi | 56% | 2556 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,317 psi | 54% | 2516 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,414 psi | 47% | 2428 fps | 97.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,334 psi | 61% | 2661 fps | 99.8% |
| Alliant Reloder-33 | <<locked>> | 98% | 47,079 psi | 72% | 2812 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,181 psi | 73% | 2703 fps | 95% |
| Bofors RP15 | <<locked>> | 82% | 36,463 psi | 56% | 2549 fps | 95.9% |
| Bofors RP30 | <<locked>> | 88% | 37,130 psi | 57% | 2585 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 36,637 psi | 56% | 2556 fps | 96.2% |
| Bofors RP7 | <<locked>> | 80% | 51,155 psi | 79% | 2743 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 86% | 36,013 psi | 55% | 2536 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 50,734 psi | 78% | 2789 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 80% | 53,127 psi | 82% | 2805 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 82% | 41,756 psi | 64% | 2615 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 82% | 40,959 psi | 63% | 2598 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,208 psi | 68% | 2628 fps | 100% |
| Hodgdon Retumbo | 75.6 gr | 84% | 34,156 psi | 53% | 2572 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 51,039 psi | 79% | 2815 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,717 psi | 43% | 1644 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,586 psi | 72% | 2674 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,707 psi | 81% | 2766 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 46,499 psi | 72% | 2684 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,422 psi | 62% | 2559 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 82% | 37,521 psi | 58% | 2582 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 96% | 37,884 psi | 58% | 2621 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 50,082 psi | 77% | 2713 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,312 psi | 74% | 2703 fps | 99.8% |
| Lovex S071 | <<locked>> | 80% | 31,140 psi | 48% | 2365 fps | 96.7% |
| Norma 204 | <<locked>> | 80% | 47,108 psi | 73% | 2717 fps | 98.6% |
| Norma 217 | <<locked>> | 92% | 32,938 psi | 51% | 2523 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 38,551 psi | 59% | 2621 fps | 98.1% |
| Norma URP | <<locked>> | 80% | 47,834 psi | 74% | 2723 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 37,304 psi | 57% | 2592 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 46,978 psi | 72% | 2723 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 82% | 33,243 psi | 51% | 2467 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,384 psi | 44% | 1683 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,110 psi | 76% | 2756 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,645 psi | 73% | 2779 fps | 100% |
| ReloadSwiss RS 76 | 79 gr | 82% | 31,024 psi | 48% | 2477 fps | 95.6% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 40,930 psi | 63% | 2694 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 42,003 psi | 65% | 2602 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 80% | 40,176 psi | 62% | 2602 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 80% | 51,155 psi | 79% | 2743 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,082 psi | 77% | 2713 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,312 psi | 74% | 2703 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,037 psi | 75% | 2664 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,842 psi | 61% | 2595 fps | 97.3% |
| Somchem S361 | <<locked>> | 80% | 42,888 psi | 66% | 2585 fps | 96.1% |
| Somchem S365 | <<locked>> | 80% | 45,078 psi | 69% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,669 psi | 63% | 2582 fps | 98.2% |
| Vihtavuori N150 | <<locked>> | 80% | 53,171 psi | 82% | 2707 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,342 psi | 76% | 2717 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,201 psi | 54% | 2454 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 80% | 48,747 psi | 75% | 2720 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,378 psi | 61% | 2592 fps | 99.9% |
| Vihtavuori N560 | 76.6 gr | 82% | 41,597 psi | 64% | 2677 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 86% | 39,146 psi | 60% | 2605 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 92% | 42,351 psi | 65% | 2710 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 98% | 49,893 psi | 77% | 2887 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,878 psi | 75% | 2674 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,937 psi | 78% | 2792 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,879 psi | 49% | 2543 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,318 psi | 57% | 2510 fps | 96.4% |
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 74 powders for .300 Rem. Ultra Mag. loaded with the .308 | 180gr | CutEdge LZR MAX GEN2. Hodgdon Retumbo delivers the highest muzzle velocity at 3,012 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,012 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 1:9.5 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 | CutEdge LZR MAX GEN2 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.