Load Specifications
Bullet:.308 | 168gr | Barnes TAC-X
Bullet Manufacturer:Barnes
Bullet Weight:168 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 | 168gr | Barnes TAC-X bullet and 106 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 Alliant Reloder-17.
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% | 55,143 psi | 86% | 2723 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 57,203 psi | 90% | 2799 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 56,710 psi | 89% | 2789 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,666 psi | 87% | 2815 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 56,913 psi | 89% | 2795 fps | 97% |
| Accurate 4064 | <<locked>> | 94% | 56,420 psi | 88% | 2831 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,562 psi | 82% | 2861 fps | 99.3% |
| Accurate LT-30 | <<locked>> | 82% | 57,711 psi | 90% | 2713 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 54,404 psi | 85% | 2822 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 55,448 psi | 87% | 2822 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,058 psi | 89% | 2828 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 57,638 psi | 90% | 2799 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,361 psi | 87% | 2884 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,911 psi | 84% | 2936 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,013 psi | 86% | 2841 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,781 psi | 86% | 2726 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,680 psi | 87% | 2864 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,184 psi | 80% | 2867 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,956 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,187 psi | 57% | 2595 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,190 psi | 63% | 2743 fps | 96.5% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 56,927 psi | 89% | 2710 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,143 psi | 85% | 2838 fps | 99.5% |
| Bofors RP3 | <<locked>> | 94% | 55,477 psi | 87% | 2854 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,941 psi | 88% | 2822 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,303 psi | 87% | 2759 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,347 psi | 88% | 2858 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,621 psi | 86% | 2900 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 54,128 psi | 85% | 2769 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,303 psi | 87% | 2799 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,797 psi | 89% | 2871 fps | 99.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,217 psi | 88% | 2917 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 98% | 57,174 psi | 90% | 2881 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 88% | 54,911 psi | 86% | 2835 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,210 psi | 74% | 2743 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,056 psi | 85% | 2864 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 57,406 psi | 90% | 2956 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,998 psi | 55% | 1706 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,347 psi | 88% | 2838 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,534 psi | 85% | 2815 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,042 psi | 86% | 2808 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,259 psi | 87% | 2785 fps | 97.5% |
| IMR 4198 | <<locked>> | 82% | 55,274 psi | 87% | 2690 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,620 psi | 82% | 2795 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,592 psi | 86% | 2805 fps | 97.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,082 psi | 78% | 2805 fps | 99% |
| IMR 4895 | <<locked>> | 92% | 57,087 psi | 89% | 2894 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 57,058 psi | 89% | 2828 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 57,072 psi | 89% | 2808 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 57,580 psi | 90% | 2848 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 57,566 psi | 90% | 2802 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 54,520 psi | 85% | 2802 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 57,101 psi | 89% | 2848 fps | 98.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,346 psi | 85% | 2828 fps | 97.6% |
| Norma 201 | <<locked>> | 90% | 56,318 psi | 88% | 2815 fps | 100% |
| Norma 202 | <<locked>> | 90% | 57,058 psi | 89% | 2818 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,839 psi | 86% | 2851 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 52,083 psi | 82% | 2851 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 92% | 55,738 psi | 87% | 2881 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,198 psi | 80% | 2848 fps | 97.8% |
| Ramshot TAC | <<locked>> | 88% | 57,435 psi | 90% | 2848 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 88% | 56,898 psi | 89% | 2864 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,636 psi | 86% | 2779 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,404 psi | 55% | 1745 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,565 psi | 89% | 2808 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 57,232 psi | 90% | 2851 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,318 psi | 88% | 2933 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,898 psi | 88% | 2966 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,591 psi | 82% | 2887 fps | 99.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 2913 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 88% | 57,159 psi | 90% | 2795 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,811 psi | 89% | 2815 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,332 psi | 87% | 2844 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,941 psi | 88% | 2822 fps | 97.1% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 57,101 psi | 89% | 2848 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 57,580 psi | 90% | 2848 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,520 psi | 85% | 2802 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,346 psi | 85% | 2828 fps | 97.6% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,231 psi | 88% | 2779 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 57,363 psi | 90% | 2910 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,898 psi | 88% | 2749 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,840 psi | 88% | 2825 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,376 psi | 88% | 2848 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,940 psi | 86% | 2713 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,868 psi | 86% | 2710 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,085 psi | 85% | 2749 fps | 97.3% |
| Somchem S321 | <<locked>> | 84% | 54,679 psi | 86% | 2808 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 57,392 psi | 90% | 2753 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,259 psi | 87% | 2815 fps | 99.9% |
| Somchem S355 | <<locked>> | 96% | 55,869 psi | 88% | 2844 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,441 psi | 73% | 2799 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,520 psi | 85% | 2677 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,158 psi | 86% | 2700 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,478 psi | 89% | 2779 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,172 psi | 85% | 2753 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 57,363 psi | 90% | 2822 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 2848 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 88% | 57,508 psi | 90% | 2825 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,695 psi | 87% | 2795 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 2854 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,001 psi | 61% | 2671 fps | 97.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,593 psi | 87% | 2835 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 57,435 psi | 90% | 2874 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 56,217 psi | 88% | 2917 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,184 psi | 50% | 2569 fps | 96.6% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,101 psi | 88% | 2854 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% | 45,571 psi | 71% | 2585 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,821 psi | 78% | 2697 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,942 psi | 59% | 2503 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,947 psi | 70% | 2654 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,719 psi | 78% | 2684 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 35,882 psi | 56% | 2493 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 34,403 psi | 54% | 2520 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 54,070 psi | 85% | 2667 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 42,134 psi | 66% | 2615 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 35,781 psi | 56% | 2461 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,251 psi | 69% | 2625 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 43,976 psi | 69% | 2612 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,721 psi | 81% | 2825 fps | 99.9% |
| Alliant Power Pro 2000-MR | 50.1 gr | 80% | 37,985 psi | 60% | 2628 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,099 psi | 55% | 2480 fps | 97.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,517 psi | 81% | 2680 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,855 psi | 59% | 2546 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,114 psi | 55% | 2536 fps | 95.4% |
| Alliant Reloder-17 | 49.4 gr | 80% | 30,240 psi | 47% | 2434 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,937 psi | 50% | 2487 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,333 psi | 59% | 2674 fps | 95.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,563 psi | 84% | 2667 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,336 psi | 65% | 2615 fps | 97.5% |
| Bofors RP3 | <<locked>> | 80% | 34,476 psi | 54% | 2480 fps | 97.7% |
| Bofors RP7 | <<locked>> | 94% | 49,342 psi | 77% | 2717 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,166 psi | 72% | 2618 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,583 psi | 67% | 2638 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,152 psi | 74% | 2782 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 80% | 50,604 psi | 79% | 2720 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,547 psi | 81% | 2746 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 37,971 psi | 60% | 2539 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 94% | 45,963 psi | 72% | 2749 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 94% | 50,198 psi | 79% | 2769 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 42,496 psi | 67% | 2625 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,124 psi | 47% | 2382 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,421 psi | 60% | 2592 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 94% | 46,166 psi | 72% | 2766 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,107 psi | 41% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,799 psi | 64% | 2575 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 41,945 psi | 66% | 2621 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,550 psi | 59% | 2497 fps | 97.1% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,600 psi | 71% | 2625 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 51,953 psi | 81% | 2644 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 46,441 psi | 73% | 2690 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,295 psi | 71% | 2648 fps | 95.2% |
| IMR 4831 | <<locked>> | 90% | 35,737 psi | 56% | 2533 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 38,783 psi | 61% | 2575 fps | 98% |
| IMR 8208 XBR | <<locked>> | 80% | 44,251 psi | 69% | 2625 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 49,705 psi | 78% | 2703 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,770 psi | 64% | 2589 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 42,438 psi | 67% | 2556 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 37,246 psi | 58% | 2500 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 39,320 psi | 62% | 2539 fps | 95.2% |
| Lovex S070 | <<locked>> | 94% | 44,875 psi | 70% | 2671 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 41,191 psi | 65% | 2566 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 41,394 psi | 65% | 2579 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,202 psi | 58% | 2533 fps | 97.5% |
| Norma URP | <<locked>> | 88% | 34,998 psi | 55% | 2526 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 36,593 psi | 57% | 2539 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 94% | 41,858 psi | 66% | 2677 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 44,208 psi | 69% | 2628 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,453 psi | 68% | 2644 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,674 psi | 75% | 2671 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,339 psi | 41% | 1562 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,632 psi | 78% | 2707 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,990 psi | 69% | 2631 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,479 psi | 62% | 2641 fps | 97.6% |
| ReloadSwiss RS 60 | 49.4 gr | 80% | 32,285 psi | 51% | 2507 fps | 98.6% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,854 psi | 58% | 2595 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,103 psi | 63% | 2667 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 44,759 psi | 70% | 2608 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,059 psi | 61% | 2516 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 32,416 psi | 51% | 2425 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 94% | 49,342 psi | 77% | 2717 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,320 psi | 62% | 2539 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,770 psi | 64% | 2589 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,246 psi | 58% | 2500 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 94% | 44,875 psi | 70% | 2671 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,373 psi | 82% | 2723 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,533 psi | 53% | 2474 fps | 96.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,475 psi | 82% | 2703 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,119 psi | 66% | 2595 fps | 96.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,611 psi | 64% | 2579 fps | 98.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,641 psi | 67% | 2526 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,244 psi | 55% | 2392 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,353 psi | 70% | 2592 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 47,790 psi | 75% | 2703 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 42,293 psi | 66% | 2530 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,061 psi | 66% | 2598 fps | 98.5% |
| Somchem S355 | <<locked>> | 80% | 33,475 psi | 52% | 2434 fps | 96.8% |
| Somchem S365 | <<locked>> | 84% | 27,398 psi | 43% | 2362 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 48,312 psi | 76% | 2589 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,960 psi | 67% | 2523 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,348 psi | 60% | 2503 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,262 psi | 62% | 2516 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,778 psi | 50% | 2375 fps | 97.7% |
| Vihtavuori N160 | <<locked>> | 88% | 36,753 psi | 58% | 2530 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 44,208 psi | 69% | 2618 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 37,681 psi | 59% | 2500 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 36,013 psi | 56% | 2530 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 96% | 34,127 psi | 53% | 2559 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,182 psi | 47% | 2346 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 43,700 psi | 68% | 2664 fps | 99.9% |
| Winchester 760 | <<locked>> | 94% | 45,963 psi | 72% | 2749 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,182 psi | 47% | 2507 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,885 psi | 63% | 2582 fps | 98.6% |
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 RCM loaded with the .308 | 168gr | Barnes TAC-X. Alliant Reloder-17 delivers the highest muzzle velocity at 2,966 fps; across all powders the maximum-charge window runs from 1,706 fps to 2,966 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 (440 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 168.0 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, Alliant Reloder-17 rank at the top here: for .300 RCM with the .308 | 168gr | Barnes TAC-X 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.