Load Specifications
Bullet Manufacturer:Rhino Bullets
Bullet Weight:150 gr
Bullet Diameter:0.307"
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:1:13.0
Load data in caliber .300 Rem. SA Ultra Mag. with .307 | 150gr | Rhino Penetrator bullet and 103 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% | 57,305 psi | 88% | 2917 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,680 psi | 86% | 2940 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,158 psi | 85% | 2933 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 57,638 psi | 89% | 3002 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 58,595 psi | 90% | 3025 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,734 psi | 78% | 2982 fps | 98.3% |
| Accurate LT-30 | <<locked>> | 82% | 56,217 psi | 86% | 2854 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,623 psi | 87% | 2884 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 56,188 psi | 86% | 3009 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 96% | 57,043 psi | 88% | 3002 fps | 99.4% |
| ADI AR 2219 | <<locked>> | 82% | 57,580 psi | 89% | 2982 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,376 psi | 85% | 2963 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,535 psi | 85% | 2943 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,942 psi | 88% | 3074 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,883 psi | 86% | 3127 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,768 psi | 87% | 3025 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,942 psi | 88% | 2923 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 57,450 psi | 88% | 3048 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,545 psi | 76% | 2989 fps | 98.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 57,812 psi | 89% | 3153 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,419 psi | 85% | 2848 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 56,159 psi | 86% | 3025 fps | 99.1% |
| Bofors RP3 | <<locked>> | 96% | 57,508 psi | 88% | 3045 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 57,986 psi | 89% | 3002 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 88% | 57,450 psi | 88% | 2949 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 58,363 psi | 90% | 3048 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,405 psi | 87% | 3094 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 84% | 56,086 psi | 86% | 2963 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 57,392 psi | 88% | 2992 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 58,798 psi | 90% | 3054 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 54,099 psi | 83% | 3038 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 90% | 56,739 psi | 87% | 3022 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,629 psi | 70% | 2864 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,753 psi | 86% | 3051 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 55,506 psi | 85% | 3074 fps | 96% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,940 psi | 54% | 1814 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 58,073 psi | 89% | 3025 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 56,434 psi | 87% | 3009 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,782 psi | 87% | 2989 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 92% | 57,246 psi | 88% | 2966 fps | 96.9% |
| IMR 4198 | <<locked>> | 84% | 56,942 psi | 88% | 2881 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 56,521 psi | 87% | 2986 fps | 96.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,182 psi | 74% | 2923 fps | 98% |
| IMR 4895 | <<locked>> | 92% | 55,376 psi | 85% | 3028 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 88% | 55,376 psi | 85% | 2963 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 55,709 psi | 86% | 2949 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,753 psi | 86% | 2986 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,043 psi | 86% | 2936 fps | 99.6% |
| Lovex S062 | <<locked>> | 94% | 56,304 psi | 87% | 2986 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,419 psi | 85% | 2976 fps | 97.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,591 psi | 81% | 2949 fps | 96.3% |
| Norma 201 | <<locked>> | 92% | 58,421 psi | 90% | 3005 fps | 100% |
| Norma 202 | <<locked>> | 90% | 55,317 psi | 85% | 2959 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,594 psi | 87% | 3035 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 50,096 psi | 77% | 2972 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 94% | 57,522 psi | 88% | 3064 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,400 psi | 76% | 2963 fps | 96.3% |
| Ramshot TAC | <<locked>> | 88% | 55,999 psi | 86% | 2976 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,317 psi | 85% | 2999 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,623 psi | 87% | 2966 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,331 psi | 54% | 1860 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 58,595 psi | 90% | 2999 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,492 psi | 85% | 2976 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 57,856 psi | 89% | 3120 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 57,609 psi | 89% | 3156 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,328 psi | 77% | 3002 fps | 98.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,111 psi | 79% | 3028 fps | 97.6% |
| Rottweil R 901 | <<locked>> | 88% | 55,883 psi | 86% | 2940 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,332 psi | 85% | 2949 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 57,072 psi | 88% | 3028 fps | 99.9% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 57,986 psi | 89% | 3002 fps | 96.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,419 psi | 85% | 2976 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,753 psi | 86% | 2986 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,304 psi | 87% | 2986 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,591 psi | 81% | 2949 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 58,566 psi | 90% | 2972 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 57,899 psi | 89% | 2995 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,492 psi | 85% | 3041 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 57,856 psi | 89% | 2946 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 57,957 psi | 89% | 3009 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 58,073 psi | 89% | 3031 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,782 psi | 87% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,739 psi | 87% | 2894 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,999 psi | 86% | 2923 fps | 96.6% |
| Somchem S321 | <<locked>> | 86% | 56,927 psi | 88% | 3002 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,956 psi | 86% | 2894 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 57,421 psi | 88% | 3002 fps | 99.7% |
| Somchem S355 | <<locked>> | 98% | 57,566 psi | 89% | 3028 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,889 psi | 69% | 2923 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 86% | 56,521 psi | 87% | 2864 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,797 psi | 87% | 2884 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 58,073 psi | 89% | 2966 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,883 psi | 86% | 2936 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,593 psi | 86% | 2956 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,895 psi | 81% | 2972 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 88% | 56,057 psi | 86% | 2966 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 57,696 psi | 89% | 2982 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,851 psi | 80% | 2976 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,594 psi | 58% | 2776 fps | 95.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,780 psi | 83% | 2959 fps | 99.8% |
| Winchester 748 | <<locked>> | 88% | 55,535 psi | 85% | 3012 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 54,099 psi | 83% | 3038 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 92% | 58,247 psi | 90% | 3045 fps | 99.9% |
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% | 44,614 psi | 69% | 2723 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,559 psi | 75% | 2831 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,289 psi | 57% | 2635 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,932 psi | 68% | 2785 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 35,259 psi | 54% | 2618 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 38,276 psi | 59% | 2743 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 52,808 psi | 81% | 2805 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,171 psi | 82% | 2831 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,988 psi | 63% | 2733 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 37,217 psi | 57% | 2631 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 53,722 psi | 83% | 2930 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,018 psi | 66% | 2749 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 42,540 psi | 65% | 2749 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,995 psi | 77% | 2959 fps | 99.4% |
| Alliant Power Pro 2000-MR | 53.2 gr | 82% | 39,668 psi | 61% | 2805 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,185 psi | 53% | 2595 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,372 psi | 77% | 2825 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,811 psi | 57% | 2657 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 92% | 38,812 psi | 60% | 2759 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 84% | 33,823 psi | 52% | 2664 fps | 95.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,996 psi | 80% | 2802 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,987 psi | 62% | 2726 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 33,547 psi | 52% | 2592 fps | 96.3% |
| Bofors RP7 | <<locked>> | 98% | 54,462 psi | 84% | 2946 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,034 psi | 69% | 2746 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,510 psi | 64% | 2762 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,513 psi | 70% | 2904 fps | 98% |
| Hodgdon H322 | <<locked>> | 80% | 49,284 psi | 76% | 2861 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,908 psi | 77% | 2877 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 39,668 psi | 61% | 2710 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 98% | 50,531 psi | 78% | 2976 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 41,292 psi | 64% | 2743 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 33,257 psi | 51% | 2592 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,246 psi | 57% | 2707 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 98% | 51,808 psi | 80% | 3009 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,976 psi | 40% | 1624 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,842 psi | 61% | 2697 fps | 97.6% |
| IMR 3031 | <<locked>> | 80% | 40,640 psi | 63% | 2753 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,622 psi | 56% | 2612 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 50,430 psi | 78% | 2854 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 50,618 psi | 78% | 2789 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 50,009 psi | 77% | 2874 fps | 95.2% |
| IMR 4831 | <<locked>> | 92% | 37,115 psi | 57% | 2697 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 37,652 psi | 58% | 2690 fps | 96.6% |
| IMR 8208 XBR | <<locked>> | 80% | 43,018 psi | 66% | 2749 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 48,617 psi | 75% | 2841 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 39,726 psi | 61% | 2713 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 41,466 psi | 64% | 2674 fps | 97.6% |
| Lovex S062 | <<locked>> | 80% | 36,405 psi | 56% | 2618 fps | 97.5% |
| Lovex S065 | <<locked>> | 92% | 43,294 psi | 67% | 2759 fps | 95.2% |
| Lovex S070 | <<locked>> | 98% | 49,429 psi | 76% | 2894 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 40,335 psi | 62% | 2690 fps | 98.4% |
| Norma 202 | <<locked>> | 80% | 40,292 psi | 62% | 2703 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 36,230 psi | 56% | 2648 fps | 96.1% |
| Norma URP | <<locked>> | 92% | 38,682 psi | 60% | 2746 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 35,679 psi | 55% | 2654 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 98% | 46,224 psi | 71% | 2904 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 42,946 psi | 66% | 2743 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,134 psi | 65% | 2762 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,586 psi | 72% | 2799 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,208 psi | 40% | 1660 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,370 psi | 74% | 2841 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 45,658 psi | 70% | 2805 fps | 95% |
| ReloadSwiss RS 52 | 50.3 gr | 80% | 38,174 psi | 59% | 2756 fps | 96% |
| ReloadSwiss RS 60 | 51.1 gr | 80% | 31,473 psi | 48% | 2608 fps | 97% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,988 psi | 63% | 2822 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 44,556 psi | 69% | 2897 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 44,092 psi | 68% | 2743 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 38,319 psi | 59% | 2641 fps | 98% |
| Rottweil R 903 | <<locked>> | 80% | 31,647 psi | 49% | 2533 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 98% | 54,462 psi | 84% | 2946 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 92% | 43,294 psi | 67% | 2759 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,726 psi | 61% | 2713 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 36,405 psi | 56% | 2618 fps | 97.5% |
| Shooters World SW4350 | <<locked>> | 98% | 49,429 psi | 76% | 2894 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,097 psi | 79% | 2858 fps | 99.6% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 53,954 psi | 83% | 2936 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 34,998 psi | 54% | 2641 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,097 psi | 79% | 2848 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,176 psi | 63% | 2713 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,552 psi | 61% | 2697 fps | 97% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,785 psi | 64% | 2654 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,519 psi | 53% | 2513 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 49,139 psi | 76% | 2815 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 46,369 psi | 71% | 2828 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 41,365 psi | 64% | 2657 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,727 psi | 63% | 2713 fps | 97.3% |
| Somchem S355 | <<locked>> | 80% | 32,735 psi | 50% | 2549 fps | 95.4% |
| Somchem S365 | <<locked>> | 88% | 30,414 psi | 47% | 2575 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 47,311 psi | 73% | 2730 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,989 psi | 65% | 2654 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,420 psi | 58% | 2635 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,203 psi | 59% | 2638 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 31,009 psi | 48% | 2484 fps | 96.3% |
| Vihtavuori N160 | <<locked>> | 92% | 40,611 psi | 62% | 2749 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 42,917 psi | 66% | 2743 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 36,796 psi | 57% | 2621 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 39,813 psi | 61% | 2749 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 98% | 35,215 psi | 54% | 2717 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,837 psi | 52% | 2562 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 42,322 psi | 65% | 2785 fps | 99.4% |
| Winchester 760 | <<locked>> | 98% | 50,734 psi | 78% | 2979 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,914 psi | 60% | 2703 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 103 powders for .300 Rem. SA Ultra Mag. loaded with the .307 | 150gr | Rhino Penetrator. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,156 fps. Accurate 4350 gives the best case fill at 100 %, and 103 of the 103 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 150.0 gr projectile in 0.307" calls for a 1:13.0 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 .307 | 150gr | Rhino Penetrator 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.