Load Specifications
Bullet Manufacturer:MRR
Bullet Weight:152 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Case Length (l3):2.003"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:74 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:13.5
Load data in caliber .300 Rem. SA Ultra Mag. with .308 | 152gr | MRR Green Hunting bullet and 106 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 and ReloadSwiss RS 52.
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 2015 | <<locked>> | 88% | 56,478 psi | 87% | 2894 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 58,711 psi | 90% | 2969 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 57,986 psi | 89% | 2959 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 57,145 psi | 88% | 2986 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 58,610 psi | 90% | 2956 fps | 96.4% |
| Accurate 4064 | <<locked>> | 96% | 57,696 psi | 89% | 3002 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,169 psi | 77% | 2963 fps | 98.4% |
| Accurate LT-30 | <<locked>> | 82% | 55,782 psi | 86% | 2838 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,202 psi | 86% | 2864 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,811 psi | 86% | 2992 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 96% | 56,797 psi | 87% | 2989 fps | 99.5% |
| ADI AR 2219 | <<locked>> | 82% | 57,029 psi | 88% | 2966 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 58,624 psi | 90% | 2999 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,158 psi | 85% | 2923 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,623 psi | 87% | 3058 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,317 psi | 85% | 3107 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,391 psi | 87% | 3009 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,246 psi | 87% | 2900 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 57,101 psi | 88% | 3031 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,197 psi | 76% | 2972 fps | 98.5% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 57,522 psi | 88% | 3136 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 58,813 psi | 90% | 2881 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,593 psi | 86% | 3002 fps | 99.2% |
| Bofors RP3 | <<locked>> | 96% | 56,971 psi | 88% | 3025 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 57,290 psi | 88% | 2982 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 88% | 56,869 psi | 87% | 2930 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 57,638 psi | 89% | 3028 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,202 psi | 86% | 3077 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 84% | 55,535 psi | 85% | 2943 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 56,797 psi | 87% | 2972 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 58,363 psi | 90% | 3038 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,780 psi | 83% | 3022 fps | 96.6% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 58,508 psi | 90% | 3041 fps | 96% |
| Hodgdon H4895 | <<locked>> | 90% | 56,391 psi | 87% | 3005 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,194 psi | 70% | 2848 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,477 psi | 85% | 3035 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 55,172 psi | 85% | 3058 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,853 psi | 54% | 1808 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 57,841 psi | 89% | 3009 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 55,796 psi | 86% | 2989 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,217 psi | 86% | 2969 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 92% | 56,681 psi | 87% | 2949 fps | 96.9% |
| IMR 4198 | <<locked>> | 84% | 56,550 psi | 87% | 2861 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,956 psi | 86% | 2966 fps | 96.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,732 psi | 73% | 2904 fps | 98% |
| IMR 4895 | <<locked>> | 94% | 58,537 psi | 90% | 3064 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 90% | 58,624 psi | 90% | 2999 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 58,755 psi | 90% | 2982 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,926 psi | 85% | 2966 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,782 psi | 86% | 2920 fps | 99.7% |
| Lovex S062 | <<locked>> | 94% | 55,535 psi | 85% | 2963 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,694 psi | 84% | 2953 fps | 97.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,141 psi | 80% | 2930 fps | 96.4% |
| Norma 201 | <<locked>> | 92% | 57,885 psi | 89% | 2989 fps | 100% |
| Norma 202 | <<locked>> | 92% | 58,537 psi | 90% | 2992 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,202 psi | 86% | 3018 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 49,719 psi | 76% | 2956 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 94% | 57,261 psi | 88% | 3048 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,037 psi | 75% | 2946 fps | 96.4% |
| Ramshot TAC | <<locked>> | 88% | 55,361 psi | 85% | 2956 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 90% | 58,537 psi | 90% | 3035 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,275 psi | 87% | 2949 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,172 psi | 54% | 1850 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 58,059 psi | 89% | 2979 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,158 psi | 85% | 2959 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 57,580 psi | 89% | 3104 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 57,305 psi | 88% | 3140 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,937 psi | 77% | 2986 fps | 98.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,734 psi | 78% | 3012 fps | 97.8% |
| Rottweil R 901 | <<locked>> | 90% | 58,436 psi | 90% | 2966 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 58,015 psi | 89% | 2979 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 56,536 psi | 87% | 3012 fps | 99.9% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 57,290 psi | 88% | 2982 fps | 96.5% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,694 psi | 84% | 2953 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,926 psi | 85% | 2966 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,535 psi | 85% | 2963 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,141 psi | 80% | 2930 fps | 96.4% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 57,986 psi | 89% | 2953 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 58,769 psi | 90% | 2618 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 57,319 psi | 88% | 2976 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,926 psi | 85% | 3022 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 57,348 psi | 88% | 2927 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 57,464 psi | 88% | 2992 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 57,798 psi | 89% | 3015 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,405 psi | 87% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,202 psi | 86% | 2874 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,564 psi | 85% | 2907 fps | 96.7% |
| Somchem S321 | <<locked>> | 86% | 56,202 psi | 86% | 2982 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,477 psi | 85% | 2877 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 56,826 psi | 87% | 2982 fps | 99.7% |
| Somchem S355 | <<locked>> | 98% | 56,826 psi | 87% | 3009 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,179 psi | 68% | 2897 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 86% | 56,188 psi | 86% | 2848 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,521 psi | 87% | 2867 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 57,682 psi | 89% | 2946 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,521 psi | 85% | 2920 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,187 psi | 85% | 2940 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,518 psi | 81% | 2959 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 88% | 55,434 psi | 85% | 2946 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 57,348 psi | 88% | 2966 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,416 psi | 79% | 2959 fps | 98.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,941 psi | 57% | 2753 fps | 95.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,447 psi | 82% | 2943 fps | 99.8% |
| Winchester 748 | <<locked>> | 88% | 55,216 psi | 85% | 2995 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,780 psi | 83% | 3022 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 92% | 57,609 psi | 89% | 3022 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 2015 | <<locked>> | 80% | 43,801 psi | 67% | 2700 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,921 psi | 74% | 2812 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,027 psi | 55% | 2605 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,062 psi | 66% | 2762 fps | 99.8% |
| Accurate 2700 | <<locked>> | 92% | 54,752 psi | 84% | 2897 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 34,069 psi | 52% | 2585 fps | 99.3% |
| Accurate 4350 | <<locked>> | 92% | 37,579 psi | 58% | 2720 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 52,605 psi | 81% | 2792 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,055 psi | 82% | 2818 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,495 psi | 62% | 2713 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 36,608 psi | 56% | 2608 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 53,142 psi | 82% | 2910 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,612 psi | 66% | 2733 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 42,105 psi | 65% | 2730 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,647 psi | 76% | 2940 fps | 99.5% |
| Alliant Power Pro 2000-MR | 53.3 gr | 82% | 39,044 psi | 60% | 2782 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,620 psi | 52% | 2575 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,647 psi | 76% | 2805 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,274 psi | 56% | 2638 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 92% | 38,174 psi | 59% | 2736 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 84% | 33,098 psi | 51% | 2635 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,764 psi | 80% | 2785 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,552 psi | 61% | 2710 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 32,822 psi | 50% | 2566 fps | 96.2% |
| Bofors RP7 | <<locked>> | 96% | 50,415 psi | 78% | 2871 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,440 psi | 68% | 2726 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,785 psi | 63% | 2740 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,194 psi | 70% | 2887 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 80% | 48,675 psi | 75% | 2838 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,545 psi | 76% | 2864 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 38,885 psi | 60% | 2687 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 96% | 47,007 psi | 72% | 2904 fps | 95% |
| Hodgdon H4350 | <<locked>> | 98% | 54,897 psi | 84% | 2986 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 40,799 psi | 63% | 2726 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 32,721 psi | 50% | 2572 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,593 psi | 56% | 2684 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 98% | 51,387 psi | 79% | 2992 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,860 psi | 40% | 1614 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,233 psi | 60% | 2677 fps | 97.6% |
| IMR 3031 | <<locked>> | 80% | 39,943 psi | 61% | 2730 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,955 psi | 55% | 2589 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 50,067 psi | 77% | 2838 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 50,198 psi | 77% | 2769 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 49,487 psi | 76% | 2858 fps | 95.3% |
| IMR 4831 | <<locked>> | 92% | 36,361 psi | 56% | 2674 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 37,130 psi | 57% | 2671 fps | 96.6% |
| IMR 8208 XBR | <<locked>> | 80% | 42,612 psi | 66% | 2733 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 47,718 psi | 73% | 2815 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 38,827 psi | 60% | 2687 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 40,857 psi | 63% | 2654 fps | 97.6% |
| Lovex S062 | <<locked>> | 80% | 35,621 psi | 55% | 2592 fps | 97.5% |
| Lovex S065 | <<locked>> | 92% | 42,728 psi | 66% | 2740 fps | 95.2% |
| Lovex S070 | <<locked>> | 98% | 48,921 psi | 75% | 2874 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 39,436 psi | 61% | 2667 fps | 98.4% |
| Norma 202 | <<locked>> | 80% | 39,784 psi | 61% | 2684 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 35,650 psi | 55% | 2625 fps | 96.1% |
| Norma URP | <<locked>> | 92% | 38,189 psi | 59% | 2726 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 34,998 psi | 54% | 2631 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 98% | 45,759 psi | 70% | 2884 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 42,511 psi | 65% | 2726 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,684 psi | 64% | 2746 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,963 psi | 71% | 2776 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,034 psi | 40% | 1654 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,747 psi | 73% | 2822 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 45,223 psi | 70% | 2789 fps | 95.1% |
| ReloadSwiss RS 52 | 50.4 gr | 80% | 37,478 psi | 58% | 2730 fps | 96% |
| ReloadSwiss RS 60 | 51.2 gr | 80% | 30,792 psi | 47% | 2582 fps | 97% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,422 psi | 62% | 2805 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,191 psi | 63% | 2815 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 43,091 psi | 66% | 2720 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 37,449 psi | 58% | 2615 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 80% | 30,734 psi | 47% | 2503 fps | 95% |
| Rottweil R 907 | <<locked>> | 96% | 50,415 psi | 78% | 2871 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 92% | 42,728 psi | 66% | 2740 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,827 psi | 60% | 2687 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 35,621 psi | 55% | 2592 fps | 97.5% |
| Shooters World SW4350 | <<locked>> | 98% | 48,921 psi | 75% | 2874 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,459 psi | 78% | 2838 fps | 99.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 55,796 psi | 86% | 2579 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 53,606 psi | 82% | 2920 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 34,316 psi | 53% | 2618 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,575 psi | 78% | 2828 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,364 psi | 62% | 2690 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,914 psi | 60% | 2677 fps | 97% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,133 psi | 63% | 2635 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,881 psi | 52% | 2493 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 48,631 psi | 75% | 2799 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 45,847 psi | 71% | 2812 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 40,625 psi | 63% | 2635 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,263 psi | 62% | 2697 fps | 97.3% |
| Somchem S355 | <<locked>> | 80% | 31,908 psi | 49% | 2520 fps | 95.2% |
| Somchem S365 | <<locked>> | 88% | 29,631 psi | 46% | 2546 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 46,673 psi | 72% | 2710 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,394 psi | 64% | 2635 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,666 psi | 56% | 2608 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,507 psi | 58% | 2615 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 30,240 psi | 47% | 2457 fps | 96.2% |
| Vihtavuori N160 | <<locked>> | 90% | 37,594 psi | 58% | 2674 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 42,482 psi | 65% | 2723 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 36,071 psi | 55% | 2598 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 39,291 psi | 60% | 2730 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 98% | 34,577 psi | 53% | 2694 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,199 psi | 51% | 2543 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 41,655 psi | 64% | 2762 fps | 99.4% |
| Winchester 760 | <<locked>> | 96% | 47,007 psi | 72% | 2904 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,247 psi | 59% | 2677 fps | 97.5% |
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 106 powders for .300 Rem. SA Ultra Mag. loaded with the .308 | 152gr | MRR Green Hunting. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,140 fps; across all powders the maximum-charge window runs from 1,808 fps to 3,140 fps. Accurate 4350 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 152.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, ReloadSwiss RS 52 rank at the top here: for .300 Rem. SA Ultra Mag. with the .308 | 152gr | MRR Green Hunting 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.