Load Specifications
Bullet:.308 | 180gr | Swift A-Frame
Bullet Manufacturer:Swift
Bullet Weight:180 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:1:14.0
Load data in caliber .300 RCM with .308 | 180gr | Swift A-Frame bullet and 100 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.
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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>> | 84% | 57,145 psi | 90% | 2654 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,912 psi | 88% | 2680 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 57,653 psi | 90% | 2746 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,882 psi | 86% | 2690 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,859 psi | 67% | 2595 fps | 97% |
| Accurate 4064 | <<locked>> | 90% | 55,999 psi | 88% | 2730 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,869 psi | 88% | 2818 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 56,231 psi | 88% | 2762 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 57,232 psi | 90% | 2762 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 50,662 psi | 79% | 2743 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,158 psi | 86% | 2710 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 56,159 psi | 88% | 2680 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 56,057 psi | 88% | 2884 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 57,348 psi | 90% | 2782 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 54,418 psi | 85% | 2756 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 57,014 psi | 89% | 2874 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,636 psi | 86% | 2854 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 49,545 psi | 78% | 2730 fps | 95.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,814 psi | 64% | 2625 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,890 psi | 72% | 2789 fps | 99% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,898 psi | 88% | 2779 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 54,491 psi | 85% | 2753 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 54,578 psi | 86% | 2726 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,666 psi | 89% | 2690 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,592 psi | 86% | 2743 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 56,521 psi | 89% | 2838 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,419 psi | 87% | 2766 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 96% | 54,926 psi | 86% | 2815 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 94% | 55,521 psi | 87% | 2779 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 86% | 56,797 psi | 89% | 2772 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,345 psi | 84% | 2749 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,449 psi | 88% | 2805 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,506 psi | 87% | 2854 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,650 psi | 56% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,404 psi | 85% | 2723 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 56,826 psi | 89% | 2746 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,666 psi | 89% | 2746 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,492 psi | 89% | 2730 fps | 98.5% |
| IMR 4350 | <<locked>> | 98% | 54,752 psi | 86% | 2749 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,202 psi | 88% | 2753 fps | 98.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,202 psi | 88% | 2808 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 55,825 psi | 87% | 2785 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 55,158 psi | 86% | 2710 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 56,217 psi | 88% | 2736 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,608 psi | 87% | 2690 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 56,492 psi | 89% | 2740 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,883 psi | 88% | 2749 fps | 99.3% |
| Lovex S070 | <<locked>> | 98% | 56,811 psi | 89% | 2785 fps | 98.8% |
| Norma 201 | <<locked>> | 86% | 55,042 psi | 86% | 2710 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,332 psi | 87% | 2703 fps | 100% |
| Norma 203B | <<locked>> | 90% | 57,072 psi | 89% | 2792 fps | 100% |
| Norma 204 | <<locked>> | 98% | 55,521 psi | 87% | 2802 fps | 96.8% |
| Norma MRPᴾ | <<locked>> | 100% | 45,774 psi | 72% | 2743 fps | 96.6% |
| Norma URP | <<locked>> | 98% | 54,868 psi | 86% | 2805 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 90% | 57,725 psi | 90% | 2818 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 57,203 psi | 90% | 2858 fps | 99.3% |
| Ramshot TAC | <<locked>> | 84% | 55,434 psi | 87% | 2736 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,129 psi | 86% | 2753 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,811 psi | 87% | 2713 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,172 psi | 57% | 1706 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,651 psi | 87% | 2749 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,984 psi | 86% | 2822 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,317 psi | 85% | 2851 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,724 psi | 87% | 2844 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,027 psi | 86% | 2871 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 84% | 56,057 psi | 88% | 2687 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,492 psi | 87% | 2707 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,375 psi | 85% | 2743 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 54,578 psi | 86% | 2726 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,883 psi | 88% | 2749 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,217 psi | 88% | 2736 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,492 psi | 89% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,811 psi | 89% | 2785 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 56,057 psi | 88% | 2802 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 57,682 psi | 90% | 2766 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,607 psi | 86% | 2733 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,420 psi | 88% | 2644 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,608 psi | 89% | 2644 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 56,173 psi | 88% | 2707 fps | 98.4% |
| Somchem S321 | <<locked>> | 82% | 56,231 psi | 88% | 2740 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,825 psi | 87% | 2644 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 57,000 psi | 89% | 2753 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 54,636 psi | 86% | 2740 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 2805 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,066 psi | 77% | 2694 fps | 96.8% |
| Vihtavuori N130 | <<locked>> | 82% | 56,043 psi | 88% | 2605 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,710 psi | 89% | 2628 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,303 psi | 87% | 2667 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,956 psi | 88% | 2684 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 56,057 psi | 88% | 2717 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 57,305 psi | 90% | 2802 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 55,506 psi | 87% | 2710 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 57,682 psi | 90% | 2730 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,318 psi | 88% | 2808 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,223 psi | 71% | 2700 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 57,537 psi | 90% | 2779 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,811 psi | 87% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,230 psi | 87% | 2818 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,579 psi | 57% | 2638 fps | 99.6% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,462 psi | 85% | 2743 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% | 50,575 psi | 79% | 2569 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,250 psi | 68% | 2500 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,473 psi | 79% | 2651 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 45,078 psi | 71% | 2530 fps | 95.5% |
| Accurate 3100 | <<locked>> | 96% | 37,376 psi | 59% | 2487 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 40,901 psi | 64% | 2500 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 32,314 psi | 51% | 2388 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 46,659 psi | 73% | 2612 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 39,711 psi | 62% | 2470 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 98% | 47,529 psi | 74% | 2687 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,704 psi | 76% | 2615 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,356 psi | 77% | 2595 fps | 100% |
| Alliant Power Pro 2000-MR | 51.4 gr | 80% | 42,424 psi | 66% | 2648 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,436 psi | 62% | 2490 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,293 psi | 66% | 2552 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 32,605 psi | 51% | 2402 fps | 95.6% |
| Alliant Reloder-17 | 50.6 gr | 80% | 33,968 psi | 53% | 2464 fps | 98% |
| Alliant Reloder-19 | <<locked>> | 98% | 46,528 psi | 73% | 2677 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,224 psi | 44% | 2310 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 92% | 34,664 psi | 54% | 2539 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,730 psi | 72% | 2615 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 39,160 psi | 61% | 2497 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 42,482 psi | 67% | 2520 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,198 psi | 79% | 2598 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,674 psi | 75% | 2638 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,750 psi | 83% | 2782 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 39,842 psi | 62% | 2500 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 88% | 42,279 psi | 66% | 2598 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 88% | 46,050 psi | 72% | 2621 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 47,094 psi | 74% | 2621 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,079 psi | 44% | 2254 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,076 psi | 68% | 2595 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 41,872 psi | 66% | 2615 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,687 psi | 42% | 1490 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,049 psi | 71% | 2575 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 46,833 psi | 73% | 2608 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,698 psi | 65% | 2503 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,903 psi | 69% | 2520 fps | 96.1% |
| IMR 4350 | <<locked>> | 90% | 42,728 psi | 67% | 2546 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,597 psi | 65% | 2503 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 31,459 psi | 49% | 2352 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 43,352 psi | 68% | 2582 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 48,704 psi | 76% | 2615 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 45,861 psi | 72% | 2589 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,456 psi | 73% | 2549 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 41,684 psi | 65% | 2503 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 36,405 psi | 57% | 2402 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 39,059 psi | 61% | 2477 fps | 95% |
| Norma 201 | <<locked>> | 80% | 45,585 psi | 71% | 2562 fps | 100% |
| Norma 202 | <<locked>> | 80% | 46,006 psi | 72% | 2569 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,684 psi | 65% | 2543 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 48,544 psi | 76% | 2690 fps | 95.3% |
| Norma MRP | <<locked>> | 98% | 42,685 psi | 67% | 2684 fps | 95.6% |
| Norma URP | <<locked>> | 82% | 32,561 psi | 51% | 2388 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 41,191 psi | 65% | 2556 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 38,624 psi | 61% | 2533 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 48,660 psi | 76% | 2631 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,254 psi | 76% | 2648 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,330 psi | 82% | 2661 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,035 psi | 42% | 1526 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,219 psi | 63% | 2484 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,643 psi | 70% | 2654 fps | 99.2% |
| ReloadSwiss RS 60 | 50.6 gr | 80% | 36,158 psi | 57% | 2530 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 34,287 psi | 54% | 2457 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 36,666 psi | 57% | 2520 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 49,792 psi | 78% | 2598 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,381 psi | 68% | 2516 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 36,782 psi | 58% | 2441 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 86% | 42,482 psi | 67% | 2520 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 82% | 36,405 psi | 57% | 2402 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,861 psi | 72% | 2589 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,684 psi | 65% | 2503 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 39,059 psi | 61% | 2477 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,666 psi | 59% | 2490 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,992 psi | 74% | 2605 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,933 psi | 70% | 2582 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,760 psi | 73% | 2510 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,030 psi | 61% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 40,582 psi | 64% | 2448 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 52,591 psi | 82% | 2690 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,470 psi | 73% | 2513 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,601 psi | 73% | 2598 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 37,579 psi | 59% | 2448 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 27,398 psi | 43% | 2290 fps | 96.9% |
| Somchem S385 | <<locked>> | 96% | 43,163 psi | 68% | 2592 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 52,649 psi | 83% | 2559 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,137 psi | 74% | 2500 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,989 psi | 67% | 2493 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,453 psi | 68% | 2503 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,679 psi | 56% | 2382 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 31,923 psi | 50% | 2339 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 48,834 psi | 77% | 2612 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,945 psi | 66% | 2497 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 33,591 psi | 53% | 2395 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 88% | 30,516 psi | 48% | 2388 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,546 psi | 49% | 2316 fps | 97.3% |
| Winchester 748 | <<locked>> | 80% | 48,617 psi | 76% | 2657 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 39,639 psi | 62% | 2546 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 28,297 psi | 44% | 2388 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,614 psi | 70% | 2589 fps | 99.7% |
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 100 powders for .300 RCM loaded with the .308 | 180gr | Swift A-Frame. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,884 fps; across all powders the maximum-charge window runs from 1,663 fps to 2,884 fps. Accurate 3100 gives the best case fill at 100 %, and 100 of the 100 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-16 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 | 180gr | Swift A-Frame 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.