Load Specifications
Bullet:.308 | 181gr | Brenneke TUG
Bullet Manufacturer:Brenneke
Bullet Weight:181 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 Rem. Ultra Mag. load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:112.5 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:64,977 psi
Recommended Twist Rate:1:13.5
Load data in caliber .300 Rem. Ultra Mag. with .308 | 181gr | Brenneke TUG bullet and 138 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 80 and Vihtavuori N570.
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% | 57,914 psi | 89% | 2838 fps | 100% |
| Accurate 3100 | <<locked>> | 90% | 57,043 psi | 88% | 2822 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 58,088 psi | 89% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,276 psi | 88% | 2848 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 54,839 psi | 84% | 2917 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 88% | 56,710 psi | 87% | 2936 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 88% | 55,825 psi | 86% | 2917 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 86% | 55,332 psi | 85% | 2871 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 58,276 psi | 90% | 2910 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 57,522 psi | 89% | 2936 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 90% | 56,623 psi | 87% | 2920 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 98% | 56,057 psi | 86% | 2904 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 55,085 psi | 85% | 2887 fps | 99.7% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,576 psi | 81% | 2936 fps | 97% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 51,822 psi | 80% | 2917 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,563 psi | 84% | 2923 fps | 100% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,592 psi | 82% | 2907 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,492 psi | 85% | 2867 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,492 psi | 85% | 2867 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 58,552 psi | 90% | 2907 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,434 psi | 85% | 2864 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 58,465 psi | 90% | 2904 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 58,537 psi | 90% | 2910 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,885 psi | 89% | 2900 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,899 psi | 89% | 2930 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,029 psi | 88% | 2917 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,796 psi | 86% | 2844 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 58,740 psi | 90% | 2877 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,927 psi | 86% | 2907 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 58,769 psi | 90% | 2943 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,507 psi | 87% | 2927 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,550 psi | 85% | 2910 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 58,291 psi | 90% | 2992 fps | 98.2% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,145 psi | 88% | 2972 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 58,204 psi | 90% | 2890 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,580 psi | 89% | 2877 fps | 98% |
| Bofors RP15 | <<locked>> | 92% | 57,058 psi | 88% | 2917 fps | 99.9% |
| Bofors RP15 | <<locked>> | 92% | 56,202 psi | 86% | 2900 fps | 99.9% |
| Bofors RP30 | <<locked>> | 96% | 55,796 psi | 86% | 2917 fps | 99.8% |
| Bofors RP30 | <<locked>> | 98% | 58,639 psi | 90% | 2956 fps | 99.9% |
| Bofors RP5 | <<locked>> | 90% | 57,899 psi | 89% | 2930 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 57,029 psi | 88% | 2917 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 58,450 psi | 90% | 2844 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,682 psi | 89% | 2927 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 56,681 psi | 87% | 2910 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 56,695 psi | 87% | 2871 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 88% | 55,898 psi | 86% | 2854 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,709 psi | 86% | 2854 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 58,755 psi | 90% | 2897 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,564 psi | 86% | 2785 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 58,668 psi | 90% | 2825 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,882 psi | 84% | 2989 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,740 psi | 89% | 3028 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,536 psi | 58% | 1857 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 58% | 1850 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,725 psi | 89% | 2848 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,058 psi | 88% | 2835 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 58,363 psi | 90% | 2848 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,624 psi | 89% | 2838 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,188 psi | 88% | 2851 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,405 psi | 87% | 2838 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 90% | 55,666 psi | 86% | 2917 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 92% | 58,769 psi | 90% | 2956 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,893 psi | 77% | 2838 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,081 psi | 76% | 2825 fps | 99% |
| Lovex S065 | <<locked>> | 82% | 57,827 psi | 89% | 2825 fps | 100% |
| Lovex S065 | <<locked>> | 82% | 57,290 psi | 88% | 2815 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,362 psi | 87% | 2825 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,680 psi | 86% | 2815 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,695 psi | 86% | 2808 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 58,479 psi | 90% | 2841 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,332 psi | 85% | 2851 fps | 99.8% |
| Norma 204 | <<locked>> | 84% | 58,436 psi | 90% | 2894 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 50,908 psi | 78% | 2867 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 49,835 psi | 77% | 2848 fps | 100% |
| Norma MRP | <<locked>> | 88% | 58,044 psi | 89% | 2949 fps | 100% |
| Norma MRP | <<locked>> | 88% | 57,145 psi | 88% | 2933 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,275 psi | 87% | 2841 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,492 psi | 85% | 2828 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,855 psi | 88% | 2936 fps | 99.8% |
| Ramshot Grand | <<locked>> | 90% | 55,912 psi | 86% | 2920 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 55,317 psi | 85% | 2848 fps | 100% |
| Ramshot Hunter | <<locked>> | 84% | 58,291 psi | 90% | 2887 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,434 psi | 85% | 2864 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,578 psi | 84% | 2851 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,421 psi | 59% | 1900 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,392 psi | 59% | 1893 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 58,494 psi | 90% | 2881 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,580 psi | 89% | 2867 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,985 psi | 88% | 2907 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,217 psi | 87% | 2894 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,840 psi | 86% | 2976 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,795 psi | 84% | 2959 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,419 psi | 85% | 2936 fps | 99.1% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 58,711 psi | 90% | 2986 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 86% | 56,057 psi | 86% | 2841 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 86% | 55,361 psi | 85% | 2828 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 88% | 58,378 psi | 90% | 2904 fps | 100% |
| Rottweil R 905 | <<locked>> | 88% | 57,667 psi | 89% | 2890 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 58,450 psi | 90% | 2844 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,827 psi | 89% | 2825 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,290 psi | 88% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,362 psi | 87% | 2825 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,680 psi | 86% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,913 psi | 88% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,202 psi | 86% | 2769 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,972 psi | 89% | 2900 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,261 psi | 88% | 2887 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 57,653 psi | 89% | 2828 fps | 99.3% |
| Somchem S361 | <<locked>> | 86% | 56,942 psi | 88% | 2815 fps | 99.2% |
| Somchem S365 | <<locked>> | 84% | 57,595 psi | 89% | 2841 fps | 100% |
| Somchem S365 | <<locked>> | 84% | 56,782 psi | 87% | 2831 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,013 psi | 85% | 2818 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 58,044 psi | 89% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,725 psi | 89% | 2831 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,971 psi | 88% | 2818 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 58,784 psi | 90% | 2858 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,957 psi | 89% | 2844 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 58,059 psi | 89% | 2871 fps | 96.5% |
| Vihtavuori N170 | <<locked>> | 96% | 57,174 psi | 88% | 2854 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 82% | 57,000 psi | 88% | 2835 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 56,318 psi | 87% | 2822 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,682 psi | 89% | 2871 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,927 psi | 88% | 2858 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,508 psi | 89% | 2946 fps | 99.5% |
| Vihtavuori N560 | <<locked>> | 88% | 56,652 psi | 87% | 2933 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 94% | 58,305 psi | 90% | 2936 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 94% | 57,464 psi | 88% | 2920 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 96% | 55,912 psi | 86% | 2940 fps | 98.8% |
| Vihtavuori N568 | <<locked>> | 96% | 54,926 psi | 85% | 2923 fps | 98.6% |
| Vihtavuori N570 | <<locked>> | 98% | 57,101 psi | 88% | 2999 fps | 97.6% |
| Vihtavuori N570 | <<locked>> | 98% | 55,883 psi | 86% | 2979 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,479 psi | 88% | 2779 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,652 psi | 87% | 2766 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,506 psi | 85% | 2927 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 58,610 psi | 90% | 2963 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 58,798 psi | 90% | 2871 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,986 psi | 89% | 2858 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% | 41,118 psi | 63% | 2572 fps | 99.5% |
| Accurate 3100 | <<locked>> | 80% | 40,480 psi | 62% | 2559 fps | 99.4% |
| Accurate 4350 | <<locked>> | 80% | 54,259 psi | 84% | 2808 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 53,447 psi | 82% | 2795 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 44,280 psi | 68% | 2733 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 80% | 42,540 psi | 65% | 2687 fps | 96% |
| Accurate MAGPRO | <<locked>> | 80% | 41,916 psi | 65% | 2671 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 45,136 psi | 69% | 2700 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 80% | 44,440 psi | 68% | 2684 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 80% | 40,393 psi | 62% | 2635 fps | 96.5% |
| ADI AR 2213 | <<locked>> | 80% | 39,900 psi | 61% | 2621 fps | 96.2% |
| ADI AR 2217 | <<locked>> | 86% | 36,883 psi | 57% | 2549 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 86% | 36,376 psi | 56% | 2533 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 98% | 48,892 psi | 75% | 2864 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 98% | 48,109 psi | 74% | 2844 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 82% | 29,428 psi | 45% | 2398 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 82% | 29,066 psi | 45% | 2385 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,469 psi | 70% | 2700 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,469 psi | 70% | 2700 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,817 psi | 69% | 2684 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,793 psi | 80% | 2812 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,155 psi | 79% | 2802 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,049 psi | 69% | 2694 fps | 98.7% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,396 psi | 68% | 2677 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,046 psi | 63% | 2641 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,524 psi | 62% | 2631 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,726 psi | 61% | 2592 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,175 psi | 60% | 2582 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,403 psi | 53% | 2523 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,794 psi | 52% | 2507 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,904 psi | 69% | 2749 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,164 psi | 68% | 2736 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,296 psi | 71% | 2792 fps | 95.3% |
| Alliant Reloder-33 | <<locked>> | 96% | 48,965 psi | 75% | 2838 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,078 psi | 69% | 2667 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,456 psi | 73% | 2707 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 38,247 psi | 59% | 2582 fps | 97% |
| Bofors RP15 | <<locked>> | 80% | 37,608 psi | 58% | 2566 fps | 96.7% |
| Bofors RP30 | <<locked>> | 84% | 36,738 psi | 57% | 2566 fps | 95.8% |
| Bofors RP30 | <<locked>> | 84% | 36,114 psi | 56% | 2549 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 41,046 psi | 63% | 2641 fps | 97.9% |
| Bofors RP5 | <<locked>> | 80% | 40,524 psi | 62% | 2631 fps | 97.7% |
| Bofors RP7 | <<locked>> | 80% | 54,969 psi | 85% | 2799 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 35,114 psi | 54% | 2510 fps | 95.6% |
| Hodgdon H1000 | <<locked>> | 82% | 34,577 psi | 53% | 2493 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 80% | 42,989 psi | 66% | 2638 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 80% | 42,525 psi | 65% | 2625 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,235 psi | 65% | 2621 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,771 psi | 64% | 2612 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,733 psi | 75% | 2690 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,124 psi | 74% | 2680 fps | 100% |
| Hodgdon Retumbo | 75.9 gr | 80% | 33,533 psi | 52% | 2549 fps | 96.1% |
| Hodgdon Retumbo | 75.9 gr | 80% | 33,083 psi | 51% | 2533 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,050 psi | 43% | 1663 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,065 psi | 43% | 1660 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,807 psi | 78% | 2743 fps | 99.9% |
| IMR 4350 | <<locked>> | 80% | 50,125 psi | 77% | 2730 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 51,169 psi | 79% | 2749 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,633 psi | 78% | 2740 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,237 psi | 68% | 2635 fps | 97.1% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,642 psi | 67% | 2621 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 80% | 39,073 psi | 60% | 2615 fps | 96.1% |
| IMR 7828 SSC | <<locked>> | 80% | 38,580 psi | 59% | 2602 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 90% | 35,288 psi | 54% | 2549 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 92% | 37,115 psi | 57% | 2592 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 54,273 psi | 84% | 2776 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 53,751 psi | 83% | 2762 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,895 psi | 81% | 2776 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,185 psi | 80% | 2762 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,447 psi | 55% | 2457 fps | 98.5% |
| Lovex S071 | <<locked>> | 80% | 34,809 psi | 54% | 2441 fps | 98.2% |
| Norma 204 | <<locked>> | 80% | 51,619 psi | 79% | 2792 fps | 99.5% |
| Norma 204 | <<locked>> | 80% | 50,923 psi | 78% | 2779 fps | 99.4% |
| Norma 217 | <<locked>> | 86% | 30,893 psi | 48% | 2457 fps | 95.5% |
| Norma 217 | <<locked>> | 86% | 30,356 psi | 47% | 2438 fps | 95% |
| Norma MRP | <<locked>> | 80% | 43,555 psi | 67% | 2713 fps | 99.4% |
| Norma MRP | <<locked>> | 80% | 42,859 psi | 66% | 2697 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 52,649 psi | 81% | 2792 fps | 100% |
| Norma URP | <<locked>> | 80% | 51,924 psi | 80% | 2779 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,073 psi | 60% | 2625 fps | 96.6% |
| Ramshot Grand | <<locked>> | 80% | 38,435 psi | 59% | 2608 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 80% | 51,634 psi | 79% | 2795 fps | 100% |
| Ramshot Hunter | <<locked>> | 80% | 50,966 psi | 78% | 2782 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,012 psi | 54% | 2503 fps | 97% |
| Ramshot Magnum | <<locked>> | 80% | 34,447 psi | 53% | 2487 fps | 96.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,761 psi | 44% | 1703 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,761 psi | 44% | 1699 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 54,592 psi | 84% | 2828 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,867 psi | 83% | 2815 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,040 psi | 82% | 2851 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,257 psi | 80% | 2838 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 32,822 psi | 51% | 2523 fps | 97.1% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 32,314 psi | 50% | 2507 fps | 96.8% |
| ReloadSwiss RS 80 | 90 gr | 88% | 40,596 psi | 62% | 2674 fps | 95.7% |
| ReloadSwiss RS 80 | 90 gr | 88% | 39,711 psi | 61% | 2654 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 46,006 psi | 71% | 2674 fps | 98% |
| Rottweil R 904 | <<locked>> | 80% | 45,527 psi | 70% | 2661 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 80% | 44,570 psi | 69% | 2684 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 80% | 44,019 psi | 68% | 2671 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 80% | 54,969 psi | 85% | 2799 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,273 psi | 84% | 2776 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,751 psi | 83% | 2762 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,895 psi | 81% | 2776 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,185 psi | 80% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,316 psi | 82% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,663 psi | 81% | 2717 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,237 psi | 68% | 2677 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,700 psi | 67% | 2664 fps | 98.5% |
| Somchem S361 | <<locked>> | 80% | 47,094 psi | 72% | 2664 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 46,557 psi | 72% | 2648 fps | 97.5% |
| Somchem S365 | <<locked>> | 80% | 50,299 psi | 77% | 2746 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 49,472 psi | 76% | 2733 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,049 psi | 69% | 2661 fps | 99.3% |
| Somchem S385 | <<locked>> | 80% | 44,556 psi | 69% | 2648 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 80% | 54,085 psi | 83% | 2782 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 53,301 psi | 82% | 2769 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,305 psi | 60% | 2539 fps | 98% |
| Vihtavuori N165 | <<locked>> | 80% | 38,682 psi | 60% | 2523 fps | 97.7% |
| Vihtavuori N170 | <<locked>> | 94% | 54,186 psi | 83% | 2812 fps | 95.6% |
| Vihtavuori N170 | <<locked>> | 94% | 53,316 psi | 82% | 2795 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 53,476 psi | 82% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 52,808 psi | 81% | 2776 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,280 psi | 68% | 2671 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,714 psi | 67% | 2657 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,323 psi | 67% | 2703 fps | 96.9% |
| Vihtavuori N560 | <<locked>> | 80% | 42,670 psi | 66% | 2690 fps | 96.6% |
| Vihtavuori N565 | <<locked>> | 82% | 38,464 psi | 59% | 2582 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 82% | 37,855 psi | 58% | 2566 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 88% | 41,785 psi | 64% | 2690 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 88% | 41,031 psi | 63% | 2674 fps | 95% |
| Vihtavuori N570 | 94.5 gr | 94% | 49,284 psi | 76% | 2867 fps | 95.7% |
| Vihtavuori N570 | 92.5 gr | 94% | 48,283 psi | 74% | 2848 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,505 psi | 82% | 2730 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,910 psi | 81% | 2720 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,463 psi | 58% | 2641 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,637 psi | 56% | 2625 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,568 psi | 64% | 2592 fps | 98% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,944 psi | 63% | 2575 fps | 97.8% |
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 138 powders for .300 Rem. Ultra Mag. loaded with the .308 | 181gr | Brenneke TUG. Hodgdon Retumbo delivers the highest muzzle velocity at 3,028 fps; across all powders the maximum-charge window runs from 1,850 fps to 3,028 fps. ADI AR 2218 gives the best case fill at 100 %, and 138 of the 138 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 181.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, 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 80, Vihtavuori N570 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 181gr | Brenneke TUG 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.