Load Specifications
Bullet Manufacturer:Rhino Bullets
Bullet Weight:150 gr
Bullet Diameter:0.307"
Bullet Length:<<locked>>
Caliber:.300 RCM load data
Case Length (l3):2.09"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:75 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:13.0
Load data in caliber .300 RCM with .307 | 150gr | Rhino Penetrator bullet and 101 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% | 56,869 psi | 89% | 2907 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,259 psi | 87% | 2933 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,694 psi | 86% | 2923 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 57,246 psi | 90% | 2995 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 54,520 psi | 85% | 2966 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,386 psi | 79% | 2976 fps | 98.2% |
| Accurate LT-30 | <<locked>> | 82% | 55,796 psi | 87% | 2848 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,202 psi | 88% | 2874 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,840 psi | 88% | 3002 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 96% | 56,695 psi | 89% | 2992 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 82% | 57,116 psi | 90% | 2976 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,056 psi | 86% | 2956 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 55,361 psi | 87% | 2940 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,811 psi | 89% | 3071 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,550 psi | 87% | 3117 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,391 psi | 88% | 3018 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,463 psi | 88% | 2913 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 57,072 psi | 89% | 3041 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,197 psi | 77% | 2979 fps | 98.3% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3140 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,071 psi | 86% | 2841 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,825 psi | 87% | 3015 fps | 99.1% |
| Bofors RP3 | <<locked>> | 96% | 57,130 psi | 90% | 3038 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 2995 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 88% | 57,058 psi | 89% | 2943 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,186 psi | 85% | 2986 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 55,999 psi | 88% | 3084 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 84% | 55,622 psi | 87% | 2956 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 57,029 psi | 89% | 2986 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,824 psi | 86% | 2992 fps | 98.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,809 psi | 84% | 3028 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 90% | 56,333 psi | 88% | 3012 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,339 psi | 71% | 2854 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,376 psi | 87% | 3045 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,925 psi | 55% | 1814 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 57,696 psi | 90% | 3015 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 55,985 psi | 88% | 3002 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,405 psi | 88% | 2982 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 92% | 56,913 psi | 89% | 2956 fps | 96.7% |
| IMR 4198 | <<locked>> | 84% | 56,507 psi | 89% | 2871 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,941 psi | 88% | 2972 fps | 96.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,877 psi | 75% | 2913 fps | 97.9% |
| IMR 4895 | <<locked>> | 92% | 54,998 psi | 86% | 3018 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 88% | 55,056 psi | 86% | 2956 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 55,303 psi | 87% | 2943 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,347 psi | 87% | 2979 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,666 psi | 87% | 2927 fps | 99.6% |
| Lovex S062 | <<locked>> | 94% | 55,912 psi | 88% | 2979 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,114 psi | 86% | 2966 fps | 97.7% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,301 psi | 82% | 2940 fps | 96.1% |
| Norma 201 | <<locked>> | 90% | 54,505 psi | 85% | 2946 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 54,969 psi | 86% | 2953 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,217 psi | 88% | 3025 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 49,777 psi | 78% | 2963 fps | 98% |
| Ramshot Big Game | <<locked>> | 94% | 56,898 psi | 89% | 3054 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,892 psi | 77% | 2949 fps | 96.1% |
| Ramshot TAC | <<locked>> | 88% | 55,622 psi | 87% | 2969 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,969 psi | 86% | 2992 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,275 psi | 88% | 2956 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,317 psi | 55% | 1857 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,708 psi | 86% | 2943 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,187 psi | 86% | 2969 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 57,435 psi | 90% | 3110 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 57,232 psi | 90% | 3146 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,067 psi | 78% | 2995 fps | 98% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,604 psi | 79% | 3015 fps | 97.5% |
| Rottweil R 901 | <<locked>> | 88% | 55,492 psi | 87% | 2933 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,926 psi | 86% | 2943 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 56,710 psi | 89% | 3022 fps | 99.9% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 2995 fps | 96.3% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,114 psi | 86% | 2966 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,347 psi | 87% | 2979 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,912 psi | 88% | 2979 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,301 psi | 82% | 2940 fps | 96.1% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,331 psi | 85% | 2907 fps | 99.8% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 57,551 psi | 90% | 2989 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,868 psi | 86% | 3031 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 57,377 psi | 90% | 2936 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 57,624 psi | 90% | 3002 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 57,740 psi | 90% | 3022 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,681 psi | 89% | 2894 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,362 psi | 88% | 2887 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,724 psi | 87% | 2917 fps | 96.4% |
| Somchem S321 | <<locked>> | 86% | 56,550 psi | 89% | 2992 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,564 psi | 87% | 2887 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 57,058 psi | 89% | 2992 fps | 99.6% |
| Somchem S355 | <<locked>> | 98% | 57,217 psi | 90% | 3022 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,338 psi | 69% | 2910 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 86% | 56,362 psi | 88% | 2861 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,666 psi | 89% | 2877 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 57,667 psi | 90% | 2956 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,492 psi | 87% | 2930 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,172 psi | 86% | 2949 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,504 psi | 82% | 2966 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 88% | 55,680 psi | 87% | 2956 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 57,363 psi | 90% | 2976 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,547 psi | 81% | 2969 fps | 98.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,548 psi | 84% | 2953 fps | 99.8% |
| Winchester 748 | <<locked>> | 88% | 55,172 psi | 86% | 3005 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,809 psi | 84% | 3028 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,099 psi | 85% | 2979 fps | 99.7% |
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% | 44,208 psi | 69% | 2713 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,428 psi | 76% | 2828 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,898 psi | 58% | 2625 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,540 psi | 68% | 2779 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 34,896 psi | 55% | 2608 fps | 99.3% |
| Accurate 4350 | <<locked>> | 92% | 37,913 psi | 59% | 2733 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 52,692 psi | 83% | 2802 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,069 psi | 83% | 2828 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,843 psi | 64% | 2726 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 36,927 psi | 58% | 2621 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 53,287 psi | 84% | 2923 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,888 psi | 67% | 2743 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 80% | 42,366 psi | 66% | 2743 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,879 psi | 78% | 2953 fps | 99.4% |
| Alliant Power Pro 2000-MR | 52.9 gr | 82% | 39,378 psi | 62% | 2795 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,026 psi | 53% | 2589 fps | 96.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,937 psi | 78% | 2818 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,695 psi | 57% | 2651 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 92% | 38,522 psi | 60% | 2749 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 84% | 33,547 psi | 53% | 2651 fps | 95.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,663 psi | 81% | 2792 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,653 psi | 62% | 2717 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 33,417 psi | 52% | 2585 fps | 96.2% |
| Bofors RP7 | <<locked>> | 98% | 54,143 psi | 85% | 2940 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,672 psi | 70% | 2736 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,205 psi | 65% | 2756 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,179 psi | 71% | 2894 fps | 97.9% |
| Hodgdon H322 | <<locked>> | 80% | 48,849 psi | 77% | 2851 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,806 psi | 78% | 2874 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 41,989 psi | 66% | 2759 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 98% | 50,169 psi | 79% | 2966 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 41,191 psi | 65% | 2740 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 32,967 psi | 52% | 2582 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,941 psi | 58% | 2697 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,904 psi | 41% | 1621 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,494 psi | 62% | 2687 fps | 97.5% |
| IMR 3031 | <<locked>> | 80% | 40,190 psi | 63% | 2743 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,318 psi | 57% | 2602 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 88% | 50,096 psi | 79% | 2844 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 50,430 psi | 79% | 2785 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 49,705 psi | 78% | 2867 fps | 95.1% |
| IMR 4831 | <<locked>> | 94% | 39,305 psi | 62% | 2746 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 37,565 psi | 59% | 2687 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 80% | 42,888 psi | 67% | 2743 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 48,211 psi | 76% | 2831 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 39,363 psi | 62% | 2703 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 41,162 psi | 65% | 2667 fps | 97.4% |
| Lovex S062 | <<locked>> | 80% | 36,085 psi | 57% | 2608 fps | 97.4% |
| Lovex S065 | <<locked>> | 92% | 43,004 psi | 67% | 2749 fps | 95% |
| Lovex S070 | <<locked>> | 98% | 49,139 psi | 77% | 2884 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 39,943 psi | 63% | 2680 fps | 98.3% |
| Norma 202 | <<locked>> | 80% | 40,161 psi | 63% | 2697 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 36,085 psi | 57% | 2641 fps | 96% |
| Norma URP | <<locked>> | 92% | 38,406 psi | 60% | 2736 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 35,389 psi | 55% | 2644 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 98% | 45,919 psi | 72% | 2894 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 42,612 psi | 67% | 2733 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,018 psi | 66% | 2759 fps | 97.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,253 psi | 72% | 2789 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,136 psi | 41% | 1657 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,964 psi | 75% | 2831 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 48,530 psi | 76% | 2854 fps | 95.7% |
| ReloadSwiss RS 52 | 50 gr | 80% | 37,797 psi | 59% | 2746 fps | 95.8% |
| ReloadSwiss RS 60 | 50.8 gr | 80% | 31,227 psi | 49% | 2598 fps | 96.9% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 40,654 psi | 64% | 2815 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 44,092 psi | 69% | 2884 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 43,700 psi | 68% | 2736 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 37,985 psi | 60% | 2631 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 80% | 31,343 psi | 49% | 2526 fps | 95% |
| Rottweil R 907 | <<locked>> | 98% | 54,143 psi | 85% | 2940 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 43,004 psi | 67% | 2749 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,363 psi | 62% | 2703 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 36,085 psi | 57% | 2608 fps | 97.4% |
| Shooters World SW4350 | <<locked>> | 98% | 49,139 psi | 77% | 2884 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,734 psi | 80% | 2851 fps | 99.6% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 53,824 psi | 84% | 2933 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 34,708 psi | 54% | 2631 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,676 psi | 79% | 2841 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,828 psi | 64% | 2703 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,233 psi | 61% | 2690 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,437 psi | 65% | 2648 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,214 psi | 54% | 2503 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 48,820 psi | 77% | 2808 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 45,992 psi | 72% | 2822 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 41,046 psi | 64% | 2651 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,437 psi | 63% | 2703 fps | 97.1% |
| Somchem S355 | <<locked>> | 80% | 32,416 psi | 51% | 2536 fps | 95.1% |
| Somchem S365 | <<locked>> | 88% | 30,182 psi | 47% | 2566 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 46,905 psi | 74% | 2723 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,640 psi | 65% | 2648 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,043 psi | 58% | 2625 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,869 psi | 59% | 2628 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 30,705 psi | 48% | 2474 fps | 96.1% |
| Vihtavuori N160 | <<locked>> | 92% | 40,292 psi | 63% | 2740 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 42,786 psi | 67% | 2736 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 36,492 psi | 57% | 2612 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 92% | 39,508 psi | 62% | 2740 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,663 psi | 53% | 2556 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 41,945 psi | 66% | 2779 fps | 99.3% |
| Winchester 760 | <<locked>> | 98% | 50,444 psi | 79% | 2972 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,580 psi | 60% | 2694 fps | 97.4% |
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 101 powders for .300 RCM loaded with the .307 | 150gr | Rhino Penetrator. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,146 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,146 fps. Accurate 4350 gives the best case fill at 100 %, and 101 of the 101 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, 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 RCM 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.