Load Specifications
Bullet Manufacturer:Rhino Bullets
Bullet Weight:165 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:1:11.5
Load data in caliber .300 RCM with .307 | 165gr | Rhino Penetrator bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR 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>> | 86% | 55,317 psi | 87% | 2740 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 57,174 psi | 90% | 2812 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 57,000 psi | 89% | 2805 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,535 psi | 87% | 2828 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 56,782 psi | 89% | 2802 fps | 96.6% |
| Accurate 4064 | <<locked>> | 94% | 56,637 psi | 89% | 2848 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,504 psi | 82% | 2871 fps | 99.1% |
| Accurate LT-30 | <<locked>> | 82% | 57,537 psi | 90% | 2726 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 54,201 psi | 85% | 2831 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 94% | 55,143 psi | 86% | 2828 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,768 psi | 89% | 2838 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 57,261 psi | 90% | 2808 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,013 psi | 86% | 2890 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 57,276 psi | 90% | 3002 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,839 psi | 86% | 2851 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,752 psi | 86% | 2740 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,463 psi | 87% | 2874 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,995 psi | 80% | 2877 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,463 psi | 87% | 2969 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,187 psi | 57% | 2605 fps | 97.2% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 56,898 psi | 89% | 2723 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,896 psi | 84% | 2844 fps | 99.3% |
| Bofors RP3 | <<locked>> | 94% | 55,419 psi | 87% | 2867 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,869 psi | 88% | 2831 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,347 psi | 87% | 2772 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,217 psi | 88% | 2871 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,259 psi | 85% | 2910 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 84% | 57,479 psi | 90% | 2831 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,042 psi | 86% | 2808 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,695 psi | 89% | 2881 fps | 99.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,709 psi | 87% | 2923 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 98% | 56,942 psi | 89% | 2887 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 88% | 54,694 psi | 86% | 2844 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,108 psi | 74% | 2756 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 57,392 psi | 90% | 2927 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 57,029 psi | 89% | 2963 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,157 psi | 55% | 1716 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,043 psi | 88% | 2848 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,447 psi | 85% | 2828 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,795 psi | 86% | 2815 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,027 psi | 86% | 2792 fps | 97.2% |
| IMR 4198 | <<locked>> | 82% | 54,984 psi | 86% | 2700 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,417 psi | 82% | 2802 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 98% | 57,682 psi | 90% | 2864 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,763 psi | 78% | 2808 fps | 98.8% |
| IMR 4895 | <<locked>> | 92% | 56,869 psi | 89% | 2904 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 56,768 psi | 89% | 2838 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 57,043 psi | 89% | 2825 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 57,450 psi | 90% | 2861 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 57,566 psi | 90% | 2815 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 57,696 psi | 90% | 2858 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 56,753 psi | 89% | 2854 fps | 98.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,346 psi | 85% | 2841 fps | 97.3% |
| Norma 201 | <<locked>> | 90% | 56,260 psi | 88% | 2828 fps | 100% |
| Norma 202 | <<locked>> | 90% | 56,840 psi | 89% | 2831 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,621 psi | 86% | 2861 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 51,953 psi | 81% | 2861 fps | 99% |
| Ramshot Big Game | <<locked>> | 92% | 55,158 psi | 86% | 2884 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,836 psi | 80% | 2851 fps | 97.4% |
| Ramshot TAC | <<locked>> | 88% | 57,246 psi | 90% | 2854 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 88% | 56,681 psi | 89% | 2874 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,433 psi | 85% | 2789 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,607 psi | 56% | 1759 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,289 psi | 88% | 2818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 57,087 psi | 89% | 2861 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,970 psi | 88% | 2943 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,347 psi | 87% | 2972 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,185 psi | 82% | 2894 fps | 98.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,446 psi | 82% | 2917 fps | 98.6% |
| Rottweil R 901 | <<locked>> | 88% | 57,537 psi | 90% | 2815 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,768 psi | 89% | 2825 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,274 psi | 87% | 2858 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,869 psi | 88% | 2831 fps | 96.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 56,753 psi | 89% | 2854 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 90% | 57,450 psi | 90% | 2861 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 57,696 psi | 90% | 2858 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,346 psi | 85% | 2841 fps | 97.3% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,985 psi | 88% | 2789 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 57,116 psi | 90% | 2920 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,724 psi | 87% | 2762 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,463 psi | 87% | 2831 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,144 psi | 88% | 2858 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,679 psi | 86% | 2723 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,607 psi | 86% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 57,522 psi | 90% | 2812 fps | 97.5% |
| Somchem S321 | <<locked>> | 84% | 54,549 psi | 85% | 2822 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 57,246 psi | 90% | 2766 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,027 psi | 86% | 2825 fps | 99.8% |
| Somchem S355 | <<locked>> | 96% | 55,724 psi | 87% | 2858 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,354 psi | 73% | 2812 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,491 psi | 85% | 2690 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,795 psi | 86% | 2710 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,217 psi | 88% | 2789 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 57,522 psi | 90% | 2812 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 57,159 psi | 90% | 2835 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,520 psi | 85% | 2861 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 88% | 57,537 psi | 90% | 2838 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,550 psi | 87% | 2805 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,548 psi | 84% | 2864 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,044 psi | 61% | 2684 fps | 97.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,216 psi | 87% | 2841 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 57,130 psi | 90% | 2884 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 56,028 psi | 88% | 2927 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,854 psi | 88% | 2864 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% | 45,803 psi | 72% | 2602 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,125 psi | 79% | 2713 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,377 psi | 60% | 2523 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,208 psi | 71% | 2671 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,676 psi | 78% | 2690 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 36,318 psi | 57% | 2513 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 37,130 psi | 58% | 2592 fps | 95.9% |
| Accurate LT-30 | <<locked>> | 80% | 53,911 psi | 84% | 2677 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 42,279 psi | 66% | 2625 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 80% | 35,926 psi | 56% | 2474 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,338 psi | 69% | 2638 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 43,947 psi | 69% | 2628 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,721 psi | 81% | 2841 fps | 99.8% |
| Alliant Power Pro 2000-MR | 49.6 gr | 80% | 38,174 psi | 60% | 2641 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,302 psi | 55% | 2497 fps | 97.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,547 psi | 81% | 2697 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,087 psi | 60% | 2559 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,331 psi | 55% | 2549 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 82% | 32,619 psi | 51% | 2510 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 96% | 32,169 psi | 50% | 2500 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,301 psi | 84% | 2677 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,205 psi | 65% | 2621 fps | 97.1% |
| Bofors RP3 | <<locked>> | 80% | 34,867 psi | 55% | 2497 fps | 97.5% |
| Bofors RP7 | <<locked>> | 94% | 49,327 psi | 77% | 2726 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,992 psi | 72% | 2628 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,801 psi | 67% | 2654 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,152 psi | 74% | 2795 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 80% | 50,531 psi | 79% | 2733 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,271 psi | 80% | 2756 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 38,290 psi | 60% | 2556 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 94% | 45,643 psi | 72% | 2753 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 96% | 53,345 psi | 84% | 2831 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 42,670 psi | 67% | 2638 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,269 psi | 47% | 2392 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,348 psi | 60% | 2602 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 96% | 49,327 psi | 77% | 2835 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 41% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,828 psi | 64% | 2589 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 41,959 psi | 66% | 2635 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,666 psi | 59% | 2507 fps | 96.8% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,701 psi | 72% | 2635 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 51,706 psi | 81% | 2654 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 49,153 psi | 77% | 2749 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,153 psi | 75% | 2710 fps | 95.6% |
| IMR 4831 | <<locked>> | 90% | 35,853 psi | 56% | 2546 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 39,001 psi | 61% | 2589 fps | 97.7% |
| IMR 8208 XBR | <<locked>> | 80% | 44,338 psi | 69% | 2638 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 49,763 psi | 78% | 2720 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,089 psi | 64% | 2605 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 42,511 psi | 67% | 2566 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 37,507 psi | 59% | 2516 fps | 98.5% |
| Lovex S065 | <<locked>> | 90% | 41,814 psi | 66% | 2602 fps | 95.6% |
| Lovex S070 | <<locked>> | 94% | 44,918 psi | 70% | 2680 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 41,263 psi | 65% | 2579 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 41,568 psi | 65% | 2592 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,478 psi | 59% | 2549 fps | 97.3% |
| Norma URP | <<locked>> | 88% | 35,259 psi | 55% | 2539 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 36,782 psi | 58% | 2552 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 94% | 41,872 psi | 66% | 2687 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 44,135 psi | 69% | 2635 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,352 psi | 68% | 2654 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,790 psi | 75% | 2684 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,484 psi | 42% | 1572 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,661 psi | 78% | 2720 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 44,164 psi | 69% | 2648 fps | 95.4% |
| ReloadSwiss RS 52 | 48.1 gr | 80% | 39,537 psi | 62% | 2654 fps | 97.3% |
| ReloadSwiss RS 60 | 48.8 gr | 80% | 32,372 psi | 51% | 2516 fps | 98.3% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,970 psi | 58% | 2608 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,958 psi | 63% | 2671 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 45,179 psi | 71% | 2625 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,421 psi | 62% | 2533 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 32,634 psi | 51% | 2438 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 94% | 49,327 psi | 77% | 2726 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,814 psi | 66% | 2602 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,089 psi | 64% | 2605 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 37,507 psi | 59% | 2516 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 94% | 44,918 psi | 70% | 2680 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,431 psi | 82% | 2736 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,779 psi | 53% | 2487 fps | 95.9% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,344 psi | 82% | 2717 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,177 psi | 66% | 2605 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,741 psi | 64% | 2595 fps | 98% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,772 psi | 67% | 2539 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,404 psi | 55% | 2408 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,210 psi | 74% | 2651 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 47,688 psi | 75% | 2713 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 42,279 psi | 66% | 2539 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,989 psi | 66% | 2608 fps | 98.2% |
| Somchem S355 | <<locked>> | 80% | 33,620 psi | 53% | 2448 fps | 96.6% |
| Somchem S365 | <<locked>> | 84% | 27,630 psi | 43% | 2375 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 48,341 psi | 76% | 2602 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,018 psi | 67% | 2536 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,522 psi | 60% | 2520 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,218 psi | 61% | 2526 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,879 psi | 50% | 2385 fps | 97.4% |
| Vihtavuori N160 | <<locked>> | 88% | 36,796 psi | 58% | 2539 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 44,338 psi | 69% | 2635 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 80% | 37,898 psi | 59% | 2516 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 36,085 psi | 57% | 2539 fps | 95% |
| Vihtavuori N555 | <<locked>> | 96% | 34,287 psi | 54% | 2572 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,545 psi | 48% | 2362 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 43,526 psi | 68% | 2674 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 45,861 psi | 72% | 2759 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,059 psi | 63% | 2595 fps | 98.4% |
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 104 powders for .300 RCM loaded with the .307 | 165gr | Rhino Penetrator. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,002 fps; across all powders the maximum-charge window runs from 1,716 fps to 3,002 fps. Accurate 4350 gives the best case fill at 100 %, and 104 of the 104 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 165.0 gr projectile in 0.307" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .300 RCM with the .307 | 165gr | 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.