Load Specifications
Bullet Manufacturer:Frontier Bullets
Bullet Weight:165 gr
Bullet Diameter:0.308"
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:1:12.0
Load data in caliber .300 RCM with .308 | 165gr | Frontier PH HPBT bullet and 104 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, Alliant Reloder-17 and ReloadSwiss RS 60.
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% | 56,086 psi | 88% | 2759 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,563 psi | 86% | 2785 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,650 psi | 86% | 2782 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,550 psi | 89% | 2848 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,998 psi | 85% | 2772 fps | 96.3% |
| Accurate 4064 | <<locked>> | 92% | 54,331 psi | 85% | 2825 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,012 psi | 85% | 2904 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 88% | 55,114 psi | 86% | 2854 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 56,318 psi | 88% | 2854 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,725 psi | 90% | 2858 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,911 psi | 86% | 2789 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 56,246 psi | 88% | 2917 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,737 psi | 86% | 2972 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,057 psi | 88% | 2877 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,724 psi | 87% | 2759 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,666 psi | 89% | 2897 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,011 psi | 82% | 2904 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,768 psi | 89% | 2999 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,130 psi | 58% | 2635 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,118 psi | 64% | 2779 fps | 96.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,969 psi | 86% | 2871 fps | 99.5% |
| Bofors RP3 | <<locked>> | 94% | 56,623 psi | 89% | 2894 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,898 psi | 89% | 2861 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,246 psi | 88% | 2795 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 57,087 psi | 89% | 2890 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,521 psi | 87% | 2940 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 54,882 psi | 86% | 2802 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,985 psi | 88% | 2831 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,186 psi | 85% | 2854 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 57,029 psi | 89% | 2949 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 96% | 54,346 psi | 85% | 2861 fps | 96% |
| Hodgdon H4895 | <<locked>> | 88% | 55,695 psi | 87% | 2867 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,124 psi | 75% | 2779 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,998 psi | 86% | 2900 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,331 psi | 85% | 2930 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,273 psi | 55% | 1726 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 57,246 psi | 90% | 2874 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,637 psi | 87% | 2851 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,709 psi | 87% | 2838 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,840 psi | 88% | 2815 fps | 97.5% |
| IMR 4198 | <<locked>> | 82% | 55,970 psi | 88% | 2723 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,359 psi | 84% | 2828 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,390 psi | 87% | 2838 fps | 97.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,082 psi | 80% | 2841 fps | 99.1% |
| IMR 4895 | <<locked>> | 90% | 54,505 psi | 85% | 2877 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 57,725 psi | 90% | 2858 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,404 psi | 85% | 2795 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,766 psi | 86% | 2835 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,911 psi | 86% | 2785 fps | 99.9% |
| Lovex S062 | <<locked>> | 92% | 55,332 psi | 87% | 2835 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,520 psi | 85% | 2831 fps | 98.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,303 psi | 87% | 2864 fps | 97.7% |
| Norma 201 | <<locked>> | 90% | 57,537 psi | 90% | 2854 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,549 psi | 85% | 2808 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,825 psi | 87% | 2884 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 52,997 psi | 83% | 2887 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 92% | 56,565 psi | 89% | 2913 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,982 psi | 81% | 2881 fps | 97.8% |
| Ramshot TAC | <<locked>> | 86% | 54,549 psi | 85% | 2825 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,998 psi | 85% | 2844 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,245 psi | 87% | 2812 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,723 psi | 56% | 1768 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 57,290 psi | 90% | 2841 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,592 psi | 86% | 2835 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 57,276 psi | 90% | 2969 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 56,724 psi | 89% | 3002 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,476 psi | 84% | 2923 fps | 99.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,534 psi | 84% | 2946 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 86% | 55,085 psi | 86% | 2789 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,433 psi | 85% | 2802 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 56,478 psi | 89% | 2884 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 56,898 psi | 89% | 2861 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,520 psi | 85% | 2831 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,766 psi | 86% | 2835 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,332 psi | 87% | 2835 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,303 psi | 87% | 2864 fps | 97.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 57,232 psi | 90% | 2815 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,549 psi | 85% | 2890 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,666 psi | 89% | 2782 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,579 psi | 89% | 2858 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 57,305 psi | 90% | 2884 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,738 psi | 87% | 2746 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,782 psi | 87% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,056 psi | 86% | 2785 fps | 97.3% |
| Somchem S321 | <<locked>> | 84% | 55,724 psi | 87% | 2848 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,984 psi | 86% | 2743 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,115 psi | 88% | 2848 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 56,608 psi | 89% | 2877 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,355 psi | 74% | 2838 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 55,593 psi | 87% | 2710 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,869 psi | 88% | 2730 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 57,290 psi | 90% | 2812 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,868 psi | 86% | 2782 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,911 psi | 86% | 2812 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,854 psi | 88% | 2887 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 86% | 54,853 psi | 86% | 2808 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,652 psi | 89% | 2831 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,839 psi | 86% | 2894 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,074 psi | 63% | 2710 fps | 97.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,550 psi | 89% | 2871 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,433 psi | 85% | 2858 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 57,363 psi | 90% | 2956 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,112 psi | 52% | 2612 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,985 psi | 89% | 2887 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% | 46,644 psi | 73% | 2621 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,184 psi | 80% | 2736 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,450 psi | 62% | 2546 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,238 psi | 72% | 2694 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 50,720 psi | 79% | 2720 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 37,304 psi | 58% | 2539 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,462 psi | 56% | 2562 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 43,004 psi | 67% | 2648 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 36,608 psi | 57% | 2500 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,034 psi | 71% | 2657 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 44,933 psi | 70% | 2648 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,634 psi | 82% | 2864 fps | 99.9% |
| Alliant Power Pro 2000-MR | 50.6 gr | 80% | 38,928 psi | 61% | 2667 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,042 psi | 56% | 2520 fps | 97.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,489 psi | 82% | 2717 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,798 psi | 61% | 2582 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 36,042 psi | 56% | 2575 fps | 95.6% |
| Alliant Reloder-17 | 49.8 gr | 80% | 31,067 psi | 49% | 2474 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,893 psi | 48% | 2470 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 38,261 psi | 60% | 2713 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,047 psi | 66% | 2648 fps | 97.5% |
| Bofors RP3 | <<locked>> | 80% | 35,534 psi | 56% | 2520 fps | 97.9% |
| Bofors RP7 | <<locked>> | 92% | 47,239 psi | 74% | 2700 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,949 psi | 74% | 2651 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,714 psi | 69% | 2677 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,182 psi | 76% | 2822 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 80% | 51,401 psi | 81% | 2753 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,257 psi | 82% | 2779 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,448 psi | 57% | 2520 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 94% | 46,891 psi | 73% | 2785 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 94% | 50,995 psi | 80% | 2805 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 43,381 psi | 68% | 2661 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,980 psi | 49% | 2421 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,204 psi | 61% | 2628 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 94% | 47,181 psi | 74% | 2805 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,252 psi | 41% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,553 psi | 65% | 2608 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 42,859 psi | 67% | 2657 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,363 psi | 60% | 2533 fps | 97.2% |
| IMR 4166 Enduron | <<locked>> | 84% | 46,528 psi | 73% | 2661 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 52,678 psi | 83% | 2677 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 47,253 psi | 74% | 2723 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 46,209 psi | 72% | 2684 fps | 95.3% |
| IMR 4831 | <<locked>> | 88% | 34,447 psi | 54% | 2520 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 39,711 psi | 62% | 2612 fps | 98% |
| IMR 8208 XBR | <<locked>> | 80% | 45,034 psi | 71% | 2657 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 50,749 psi | 80% | 2740 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,843 psi | 66% | 2628 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 43,192 psi | 68% | 2589 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 38,276 psi | 60% | 2539 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 40,205 psi | 63% | 2575 fps | 95.3% |
| Lovex S070 | <<locked>> | 94% | 45,934 psi | 72% | 2707 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 42,250 psi | 66% | 2605 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 42,322 psi | 66% | 2615 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,159 psi | 60% | 2569 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 36,013 psi | 56% | 2566 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 37,594 psi | 59% | 2579 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 94% | 42,757 psi | 67% | 2713 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 44,918 psi | 70% | 2661 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,222 psi | 69% | 2677 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,646 psi | 76% | 2707 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,527 psi | 42% | 1578 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,444 psi | 79% | 2740 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,206 psi | 66% | 2615 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,335 psi | 63% | 2677 fps | 97.6% |
| ReloadSwiss RS 60 | 49.8 gr | 80% | 33,054 psi | 52% | 2543 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 37,884 psi | 59% | 2638 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,944 psi | 64% | 2707 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 46,035 psi | 72% | 2648 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,161 psi | 63% | 2556 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 33,533 psi | 53% | 2467 fps | 97% |
| Rottweil R 907 | <<locked>> | 92% | 47,239 psi | 74% | 2700 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 88% | 40,205 psi | 63% | 2575 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,843 psi | 66% | 2628 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 38,276 psi | 60% | 2539 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 94% | 45,934 psi | 72% | 2707 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,388 psi | 84% | 2762 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,374 psi | 54% | 2510 fps | 96.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 53,301 psi | 84% | 2740 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,033 psi | 67% | 2631 fps | 96.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,408 psi | 65% | 2615 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,540 psi | 68% | 2559 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,129 psi | 57% | 2428 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 45,121 psi | 71% | 2625 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 48,588 psi | 76% | 2736 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 43,236 psi | 68% | 2562 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,859 psi | 67% | 2631 fps | 98.5% |
| Somchem S355 | <<locked>> | 80% | 34,519 psi | 54% | 2474 fps | 97% |
| Somchem S365 | <<locked>> | 84% | 28,282 psi | 44% | 2402 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 49,211 psi | 77% | 2625 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,787 psi | 69% | 2556 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,392 psi | 62% | 2543 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,147 psi | 63% | 2549 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,706 psi | 51% | 2411 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 86% | 35,375 psi | 55% | 2516 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 45,063 psi | 71% | 2654 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 38,566 psi | 60% | 2536 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 37,072 psi | 58% | 2572 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 32,996 psi | 52% | 2546 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 31,111 psi | 49% | 2385 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 44,541 psi | 70% | 2697 fps | 99.9% |
| Winchester 760 | <<locked>> | 94% | 46,891 psi | 73% | 2785 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 31,111 psi | 49% | 2549 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,915 psi | 64% | 2621 fps | 98.7% |
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 .308 | 165gr | Frontier PH HPBT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,002 fps; across all powders the maximum-charge window runs from 1,726 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 52–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:12.0 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. Alliant Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .300 RCM with the .308 | 165gr | Frontier PH HPBT 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.