Load Specifications
Bullet Manufacturer:MAKER
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:1:12.0
Load data in caliber .300 RCM with .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets bullet and 105 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and ReloadSwiss RS 70.
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>> | 84% | 57,319 psi | 90% | 2503 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,695 psi | 87% | 2526 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 53,969 psi | 85% | 2546 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,071 psi | 86% | 2546 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,018 psi | 67% | 2464 fps | 97.9% |
| Accurate 4064 | <<locked>> | 90% | 56,086 psi | 88% | 2575 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 56,173 psi | 88% | 2671 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 56,492 psi | 89% | 2612 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 57,653 psi | 90% | 2615 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 51,140 psi | 80% | 2608 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,274 psi | 87% | 2559 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 56,695 psi | 89% | 2530 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 56,492 psi | 89% | 2733 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,114 psi | 85% | 2585 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 54,592 psi | 86% | 2605 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 57,508 psi | 90% | 2723 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 55,187 psi | 86% | 2707 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 50,009 psi | 78% | 2595 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,886 psi | 64% | 2490 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,100 psi | 57% | 2402 fps | 96.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,876 psi | 72% | 2648 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 56,333 psi | 88% | 2631 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 54,578 psi | 86% | 2598 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 54,853 psi | 86% | 2582 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,956 psi | 89% | 2539 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,882 psi | 86% | 2592 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 57,058 psi | 89% | 2687 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,622 psi | 87% | 2618 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 96% | 55,405 psi | 87% | 2674 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 94% | 55,941 psi | 88% | 2635 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 86% | 57,072 psi | 89% | 2618 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,708 psi | 84% | 2602 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,942 psi | 89% | 2654 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,883 psi | 88% | 2710 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,679 psi | 56% | 1558 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,694 psi | 86% | 2572 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 57,246 psi | 90% | 2592 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,159 psi | 90% | 2598 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,782 psi | 89% | 2582 fps | 99.1% |
| IMR 4350 | <<locked>> | 98% | 55,100 psi | 86% | 2608 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,652 psi | 89% | 2608 fps | 99% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,724 psi | 89% | 2661 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 56,014 psi | 88% | 2631 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 55,274 psi | 87% | 2559 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 56,405 psi | 88% | 2585 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,999 psi | 88% | 2543 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 56,869 psi | 89% | 2589 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,985 psi | 88% | 2602 fps | 99.7% |
| Lovex S070 | <<locked>> | 98% | 56,927 psi | 89% | 2638 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 35,578 psi | 56% | 2326 fps | 95.9% |
| Norma 201 | <<locked>> | 86% | 54,926 psi | 86% | 2552 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,782 psi | 87% | 2556 fps | 100% |
| Norma 203B | <<locked>> | 90% | 57,537 psi | 90% | 2644 fps | 100% |
| Norma 204 | <<locked>> | 98% | 55,709 psi | 87% | 2657 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 45,730 psi | 72% | 2605 fps | 97.5% |
| Norma URP | <<locked>> | 98% | 55,187 psi | 86% | 2657 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 54,520 psi | 85% | 2621 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 57,667 psi | 90% | 2710 fps | 99.7% |
| Ramshot TAC | <<locked>> | 84% | 55,593 psi | 87% | 2589 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,245 psi | 87% | 2598 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 56,260 psi | 88% | 2569 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,245 psi | 57% | 1598 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,753 psi | 87% | 2602 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,419 psi | 87% | 2671 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,955 psi | 86% | 2703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 56,014 psi | 88% | 2694 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,492 psi | 87% | 2726 fps | 100% |
| Rottweil R 901 | <<locked>> | 84% | 55,941 psi | 88% | 2533 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,434 psi | 87% | 2552 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,433 psi | 85% | 2592 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 52,895 psi | 83% | 2582 fps | 96.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 48,515 psi | 76% | 2575 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 94% | 54,853 psi | 86% | 2582 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,985 psi | 88% | 2602 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,405 psi | 88% | 2585 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,869 psi | 89% | 2589 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,927 psi | 89% | 2638 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 56,463 psi | 88% | 2654 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 53,882 psi | 84% | 2566 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,926 psi | 86% | 2585 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,478 psi | 89% | 2493 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 57,116 psi | 90% | 2497 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 56,246 psi | 88% | 2562 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 48,051 psi | 75% | 2572 fps | 96.6% |
| Somchem S321 | <<locked>> | 82% | 56,710 psi | 89% | 2592 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,811 psi | 87% | 2490 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 57,450 psi | 90% | 2605 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 54,969 psi | 86% | 2592 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 53,534 psi | 84% | 2661 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,356 psi | 77% | 2559 fps | 97.7% |
| Vihtavuori N130 | <<locked>> | 82% | 56,362 psi | 88% | 2454 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,855 psi | 89% | 2477 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,593 psi | 87% | 2516 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 56,391 psi | 88% | 2536 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 56,478 psi | 89% | 2572 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 54,244 psi | 85% | 2608 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 55,970 psi | 88% | 2562 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,288 psi | 85% | 2533 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,565 psi | 89% | 2661 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,121 psi | 71% | 2556 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 54,027 psi | 85% | 2585 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,130 psi | 88% | 2608 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,709 psi | 87% | 2677 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,492 psi | 57% | 2510 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,636 psi | 86% | 2592 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% | 50,546 psi | 79% | 2421 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,902 psi | 67% | 2356 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,386 psi | 79% | 2500 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,395 psi | 66% | 2349 fps | 95.7% |
| Accurate 3100 | <<locked>> | 94% | 34,693 psi | 54% | 2310 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 40,640 psi | 64% | 2359 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 29,921 psi | 47% | 2211 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 46,746 psi | 73% | 2470 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 39,610 psi | 62% | 2336 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 96% | 44,788 psi | 70% | 2503 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,921 psi | 77% | 2470 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,690 psi | 78% | 2444 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,569 psi | 67% | 2510 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,349 psi | 62% | 2356 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,366 psi | 66% | 2415 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,560 psi | 48% | 2228 fps | 95.9% |
| Alliant Reloder-17 | 47.8 gr | 80% | 34,011 psi | 53% | 2339 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 43,990 psi | 69% | 2493 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,310 psi | 41% | 2142 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 98% | 33,794 psi | 53% | 2346 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 90% | 32,126 psi | 50% | 2356 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,963 psi | 72% | 2477 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 39,102 psi | 61% | 2362 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 40,016 psi | 63% | 2339 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,517 psi | 79% | 2454 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,718 psi | 75% | 2493 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 53,301 psi | 84% | 2638 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,929 psi | 63% | 2369 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 84% | 37,057 psi | 58% | 2362 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 86% | 43,279 psi | 68% | 2434 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 47,239 psi | 74% | 2480 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,949 psi | 44% | 2136 fps | 96.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,308 psi | 68% | 2457 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 39,030 psi | 61% | 2425 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,629 psi | 42% | 1391 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,208 psi | 71% | 2434 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 47,079 psi | 74% | 2461 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,611 psi | 65% | 2362 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,077 psi | 69% | 2385 fps | 97% |
| IMR 4350 | <<locked>> | 88% | 40,350 psi | 63% | 2369 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 39,001 psi | 61% | 2320 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 29,225 psi | 46% | 2175 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 43,439 psi | 68% | 2441 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 48,921 psi | 77% | 2470 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,079 psi | 72% | 2448 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,456 psi | 73% | 2405 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 41,481 psi | 65% | 2362 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 34,055 psi | 53% | 2224 fps | 95.6% |
| Lovex S070 | <<locked>> | 84% | 36,550 psi | 57% | 2297 fps | 95.2% |
| Lovex S071 | <<locked>> | 98% | 33,243 psi | 52% | 2277 fps | 95% |
| Norma 201 | <<locked>> | 80% | 45,600 psi | 71% | 2421 fps | 100% |
| Norma 202 | <<locked>> | 80% | 45,992 psi | 72% | 2421 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,713 psi | 65% | 2405 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 45,498 psi | 71% | 2500 fps | 95.5% |
| Norma MRP | <<locked>> | 96% | 40,089 psi | 63% | 2497 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 30,501 psi | 48% | 2215 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 41,292 psi | 65% | 2418 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 86% | 36,274 psi | 57% | 2356 fps | 95.9% |
| Ramshot TAC | <<locked>> | 80% | 48,573 psi | 76% | 2487 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,414 psi | 76% | 2503 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,431 psi | 82% | 2516 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,992 psi | 42% | 1427 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,219 psi | 63% | 2352 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,078 psi | 71% | 2516 fps | 99.7% |
| ReloadSwiss RS 60 | 47.8 gr | 80% | 36,245 psi | 57% | 2395 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 29,646 psi | 46% | 2221 fps | 95% |
| ReloadSwiss RS 70 | 49.8 gr | 82% | 32,024 psi | 50% | 2283 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 49,487 psi | 78% | 2448 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,250 psi | 68% | 2375 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 36,738 psi | 58% | 2310 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 98% | 49,371 psi | 77% | 2530 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 96% | 42,641 psi | 67% | 2477 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 84% | 40,016 psi | 63% | 2339 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,055 psi | 53% | 2224 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,079 psi | 72% | 2448 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,481 psi | 65% | 2362 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 36,550 psi | 57% | 2297 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,942 psi | 59% | 2362 fps | 99% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,065 psi | 74% | 2464 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,281 psi | 71% | 2444 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,992 psi | 74% | 2369 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,218 psi | 61% | 2251 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 38,014 psi | 60% | 2270 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 42,250 psi | 66% | 2470 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 52,794 psi | 83% | 2543 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,543 psi | 73% | 2369 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,760 psi | 73% | 2457 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 37,565 psi | 59% | 2316 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 27,151 psi | 43% | 2169 fps | 97.8% |
| Somchem S385 | <<locked>> | 94% | 40,292 psi | 63% | 2408 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 52,982 psi | 83% | 2415 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,456 psi | 74% | 2359 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,149 psi | 68% | 2352 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,714 psi | 69% | 2365 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,752 psi | 56% | 2257 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 31,865 psi | 50% | 2218 fps | 96.1% |
| Vihtavuori N530 | <<locked>> | 80% | 49,095 psi | 77% | 2467 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,076 psi | 66% | 2359 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,314 psi | 49% | 2218 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 86% | 28,224 psi | 44% | 2208 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,444 psi | 49% | 2195 fps | 98.1% |
| Winchester 748 | <<locked>> | 80% | 48,979 psi | 77% | 2513 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 37,057 psi | 58% | 2362 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,237 psi | 41% | 2215 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,643 psi | 70% | 2448 fps | 100% |
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 105 powders for .300 RCM loaded with the .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,733 fps; across all powders the maximum-charge window runs from 1,558 fps to 2,733 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 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 200.0 gr projectile in 0.308" calls for a 1:12.0 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 Reloder-17, ReloadSwiss RS 60, ReloadSwiss RS 70 rank at the top here: for .300 RCM with the .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets 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.