Load Specifications
Bullet Manufacturer:SAKO
Bullet Weight:200 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 | 200gr | Sako Hammerhead bullet and 107 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, 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>> | 82% | 57,130 psi | 90% | 2510 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,637 psi | 89% | 2543 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,013 psi | 86% | 2562 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,268 psi | 74% | 2539 fps | 98.8% |
| Accurate 4064 | <<locked>> | 88% | 56,811 psi | 89% | 2592 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 57,043 psi | 89% | 2690 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 56,217 psi | 88% | 2618 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 57,261 psi | 90% | 2621 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,476 psi | 85% | 2677 fps | 97.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,042 psi | 86% | 2566 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,536 psi | 89% | 2536 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,492 psi | 89% | 2743 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,491 psi | 85% | 2674 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,725 psi | 90% | 2641 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,708 psi | 86% | 2618 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,537 psi | 90% | 2736 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,434 psi | 87% | 2720 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 2667 fps | 97.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 47,094 psi | 74% | 2608 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,570 psi | 70% | 2562 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,986 psi | 61% | 2477 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,198 psi | 79% | 2730 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,057 psi | 88% | 2638 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 55,085 psi | 86% | 2615 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 47,094 psi | 74% | 2608 fps | 96.7% |
| Bofors RP7 | <<locked>> | 92% | 54,781 psi | 86% | 2598 fps | 98.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,565 psi | 89% | 2549 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,708 psi | 86% | 2598 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,825 psi | 87% | 2631 fps | 100% |
| Hodgdon H414 | <<locked>> | 94% | 55,608 psi | 87% | 2687 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 92% | 56,028 psi | 88% | 2651 fps | 98.4% |
| Hodgdon H4895 | <<locked>> | 84% | 56,869 psi | 89% | 2628 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,331 psi | 85% | 2621 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,811 psi | 89% | 2664 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,043 psi | 88% | 2730 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,143 psi | 57% | 1581 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,621 psi | 86% | 2585 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 57,290 psi | 90% | 2598 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,971 psi | 89% | 2608 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,333 psi | 88% | 2592 fps | 99.2% |
| IMR 4350 | <<locked>> | 96% | 55,347 psi | 87% | 2628 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,347 psi | 88% | 2621 fps | 99.2% |
| IMR 4831 | <<locked>> | 98% | 57,334 psi | 90% | 2680 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 56,101 psi | 88% | 2644 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 54,143 psi | 85% | 2608 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 82% | 55,042 psi | 86% | 2566 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,652 psi | 89% | 2595 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,535 psi | 87% | 2549 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,956 psi | 89% | 2598 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,318 psi | 88% | 2618 fps | 99.8% |
| Lovex S070 | <<locked>> | 96% | 57,450 psi | 90% | 2657 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,160 psi | 61% | 2402 fps | 97.2% |
| Norma 201 | <<locked>> | 84% | 54,955 psi | 86% | 2566 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,666 psi | 87% | 2562 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,464 psi | 90% | 2651 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,738 psi | 87% | 2674 fps | 98% |
| Norma MRPᴾ | <<locked>> | 100% | 49,922 psi | 78% | 2690 fps | 98.6% |
| Norma URP | <<locked>> | 96% | 55,840 psi | 88% | 2677 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 54,679 psi | 86% | 2631 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,288 psi | 85% | 2677 fps | 99.6% |
| Ramshot TAC | <<locked>> | 82% | 55,274 psi | 87% | 2598 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,143 psi | 86% | 2612 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,767 psi | 58% | 1621 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,695 psi | 87% | 2615 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,608 psi | 87% | 2684 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,969 psi | 86% | 2710 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,550 psi | 89% | 2713 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,492 psi | 87% | 2740 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 56,072 psi | 88% | 2543 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,738 psi | 87% | 2566 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,969 psi | 86% | 2608 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,318 psi | 88% | 2648 fps | 97.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,547 psi | 82% | 2651 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 92% | 54,781 psi | 86% | 2598 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,318 psi | 88% | 2618 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,652 psi | 89% | 2595 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,956 psi | 89% | 2598 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,450 psi | 90% | 2657 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,739 psi | 89% | 2667 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,711 psi | 90% | 2628 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,839 psi | 86% | 2595 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,217 psi | 88% | 2500 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,768 psi | 89% | 2503 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,202 psi | 88% | 2575 fps | 99.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,054 psi | 82% | 2644 fps | 97.7% |
| Somchem S335 | <<locked>> | 84% | 55,622 psi | 87% | 2497 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 57,130 psi | 90% | 2612 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 55,027 psi | 86% | 2602 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 54,708 psi | 86% | 2595 fps | 95.9% |
| Somchem S365 | <<locked>> | 98% | 54,360 psi | 85% | 2677 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,287 psi | 84% | 2631 fps | 98.6% |
| Vihtavuori N133 | <<locked>> | 84% | 56,637 psi | 89% | 2484 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,651 psi | 87% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,318 psi | 88% | 2546 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,507 psi | 89% | 2582 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,549 psi | 85% | 2625 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,021 psi | 72% | 2507 fps | 96.8% |
| Vihtavuori N530 | <<locked>> | 82% | 55,651 psi | 87% | 2569 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,230 psi | 85% | 2543 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,985 psi | 89% | 2677 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,588 psi | 78% | 2631 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,041 psi | 85% | 2595 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,883 psi | 88% | 2612 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,927 psi | 88% | 2690 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,885 psi | 63% | 2598 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,853 psi | 86% | 2605 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,893 psi | 78% | 2572 fps | 97% |
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% | 53,867 psi | 84% | 2467 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,731 psi | 73% | 2415 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,107 psi | 71% | 2408 fps | 96.8% |
| Accurate 3100 | <<locked>> | 90% | 33,620 psi | 53% | 2290 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 44,208 psi | 69% | 2418 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,924 psi | 52% | 2283 fps | 97.1% |
| ADI AR 2206H | <<locked>> | 80% | 49,617 psi | 78% | 2523 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,409 psi | 66% | 2395 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 42,264 psi | 66% | 2467 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,677 psi | 81% | 2523 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 53,156 psi | 83% | 2493 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,934 psi | 72% | 2582 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 42,177 psi | 66% | 2467 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,438 psi | 67% | 2418 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,252 psi | 71% | 2474 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,909 psi | 52% | 2297 fps | 97.2% |
| Alliant Reloder-17 | 50 gr | 80% | 36,825 psi | 58% | 2411 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 41,669 psi | 65% | 2464 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 96% | 41,394 psi | 65% | 2503 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,498 psi | 40% | 2123 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 94% | 32,503 psi | 51% | 2323 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 86% | 30,821 psi | 48% | 2326 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,255 psi | 77% | 2539 fps | 99.9% |
| Bofors RP3 | <<locked>> | 80% | 42,438 psi | 67% | 2425 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 41,394 psi | 65% | 2503 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 37,855 psi | 59% | 2306 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,171 psi | 83% | 2503 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,372 psi | 81% | 2552 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,946 psi | 67% | 2431 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 37,521 psi | 59% | 2379 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 82% | 40,857 psi | 64% | 2402 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 50,125 psi | 79% | 2533 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,385 psi | 48% | 2201 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,630 psi | 73% | 2520 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 39,334 psi | 62% | 2444 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,021 psi | 42% | 1411 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,109 psi | 75% | 2490 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,459 psi | 79% | 2513 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,585 psi | 70% | 2425 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,746 psi | 73% | 2444 fps | 97.9% |
| IMR 4350 | <<locked>> | 84% | 38,145 psi | 60% | 2336 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,204 psi | 61% | 2336 fps | 95.9% |
| IMR 4831 | <<locked>> | 80% | 31,937 psi | 50% | 2244 fps | 96.8% |
| IMR 4895 | <<locked>> | 80% | 46,354 psi | 73% | 2500 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 51,111 psi | 80% | 2562 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 51,677 psi | 81% | 2523 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,559 psi | 78% | 2503 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,284 psi | 77% | 2461 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,686 psi | 70% | 2425 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,680 psi | 57% | 2290 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 37,159 psi | 58% | 2316 fps | 95.7% |
| Lovex S071 | <<locked>> | 96% | 34,577 psi | 54% | 2310 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 48,704 psi | 76% | 2477 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,269 psi | 77% | 2477 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,599 psi | 70% | 2461 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 42,699 psi | 67% | 2461 fps | 95.1% |
| Norma MRP | <<locked>> | 92% | 38,058 psi | 60% | 2467 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 33,127 psi | 52% | 2283 fps | 97% |
| Ramshot Big Game | <<locked>> | 80% | 44,643 psi | 70% | 2484 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 34,345 psi | 54% | 2320 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 51,735 psi | 81% | 2546 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,590 psi | 81% | 2559 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,441 psi | 43% | 1447 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,178 psi | 68% | 2418 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,457 psi | 76% | 2579 fps | 100% |
| ReloadSwiss RS 60 | 50 gr | 80% | 39,175 psi | 61% | 2464 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,619 psi | 51% | 2297 fps | 96.6% |
| ReloadSwiss RS 70 | 50.8 gr | 80% | 32,387 psi | 51% | 2303 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 52,939 psi | 83% | 2500 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,340 psi | 73% | 2431 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,827 psi | 62% | 2372 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 46,688 psi | 73% | 2500 fps | 95% |
| Rottweil R 905 | <<locked>> | 94% | 43,250 psi | 68% | 2497 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 37,855 psi | 59% | 2306 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,680 psi | 57% | 2290 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,559 psi | 78% | 2503 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,686 psi | 70% | 2425 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 37,159 psi | 58% | 2316 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,814 psi | 64% | 2421 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,270 psi | 79% | 2526 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,182 psi | 76% | 2500 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,893 psi | 78% | 2418 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,901 psi | 66% | 2303 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 35,969 psi | 56% | 2241 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,830 psi | 67% | 2493 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 49,414 psi | 77% | 2418 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,140 psi | 79% | 2516 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,466 psi | 63% | 2375 fps | 99.7% |
| Somchem S361 | <<locked>> | 96% | 51,140 psi | 80% | 2543 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 29,820 psi | 47% | 2244 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 38,551 psi | 60% | 2382 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 50,357 psi | 79% | 2405 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,427 psi | 73% | 2405 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,572 psi | 73% | 2415 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,464 psi | 60% | 2313 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 34,447 psi | 54% | 2280 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 96% | 40,408 psi | 63% | 2405 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 52,185 psi | 82% | 2523 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,962 psi | 70% | 2411 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,084 psi | 53% | 2287 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 27,514 psi | 43% | 2192 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,997 psi | 53% | 2260 fps | 99% |
| Winchester 748 | <<locked>> | 80% | 52,431 psi | 82% | 2569 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 37,739 psi | 59% | 2382 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,440 psi | 40% | 2195 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,819 psi | 75% | 2503 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 43,584 psi | 68% | 2467 fps | 95.5% |
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 107 powders for .300 RCM loaded with the .308 | 200gr | Sako Hammerhead. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,743 fps; across all powders the maximum-charge window runs from 1,581 fps to 2,743 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 200.0 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 Power Pro Varmint 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 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .300 RCM with the .308 | 200gr | Sako Hammerhead 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.