Load Specifications
Bullet Manufacturer:Berger
Bullet Weight:175 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 | 175gr | Berger LRBT Target bullet and 99 powders. The key underlying parameters are shown in the table above.
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% | 54,984 psi | 86% | 2661 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,855 psi | 89% | 2733 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 57,276 psi | 90% | 2730 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,419 psi | 87% | 2749 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,246 psi | 88% | 2733 fps | 97.4% |
| Accurate 4064 | <<locked>> | 92% | 56,971 psi | 89% | 2776 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 56,768 psi | 89% | 2864 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 88% | 57,363 psi | 90% | 2808 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 54,984 psi | 86% | 2759 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,637 psi | 89% | 2762 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 57,435 psi | 90% | 2733 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 57,290 psi | 90% | 2930 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,940 psi | 86% | 2782 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,506 psi | 87% | 2802 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,418 psi | 85% | 2864 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,550 psi | 87% | 2900 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,812 psi | 61% | 2608 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,439 psi | 68% | 2762 fps | 98.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 57,435 psi | 90% | 2828 fps | 99.9% |
| Bofors RP3 | <<locked>> | 92% | 55,608 psi | 87% | 2799 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,666 psi | 87% | 2766 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,752 psi | 86% | 2694 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,941 psi | 88% | 2792 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,244 psi | 85% | 2838 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 57,043 psi | 89% | 2749 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,681 psi | 89% | 2812 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 98% | 56,159 psi | 88% | 2861 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 96% | 56,840 psi | 89% | 2825 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 86% | 54,708 psi | 86% | 2772 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,633 psi | 79% | 2743 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 57,580 psi | 90% | 2854 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 56,753 psi | 89% | 2897 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,447 psi | 56% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,869 psi | 88% | 2772 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,418 psi | 85% | 2749 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,636 psi | 86% | 2746 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,418 psi | 85% | 2720 fps | 97.8% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,825 psi | 87% | 2792 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 96% | 57,653 psi | 90% | 2799 fps | 98.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,490 psi | 84% | 2799 fps | 99.6% |
| IMR 4895 | <<locked>> | 90% | 56,927 psi | 89% | 2831 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,637 psi | 89% | 2762 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,739 psi | 89% | 2746 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 57,348 psi | 90% | 2785 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 56,869 psi | 89% | 2736 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 57,696 psi | 90% | 2785 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 56,927 psi | 89% | 2792 fps | 99.2% |
| Lovex S070 | <<locked>> | 98% | 54,302 psi | 85% | 2776 fps | 98.1% |
| Norma 201 | <<locked>> | 88% | 56,202 psi | 88% | 2756 fps | 100% |
| Norma 202 | <<locked>> | 88% | 56,811 psi | 89% | 2756 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,737 psi | 86% | 2789 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 56,739 psi | 89% | 2844 fps | 96.5% |
| Norma URPᴾ | <<locked>> | 100% | 55,753 psi | 87% | 2848 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 90% | 55,361 psi | 87% | 2818 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,650 psi | 86% | 2848 fps | 98.7% |
| Ramshot TAC | <<locked>> | 86% | 56,739 psi | 89% | 2782 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,304 psi | 88% | 2799 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 57,363 psi | 90% | 2762 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,955 psi | 56% | 1719 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,825 psi | 87% | 2740 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 56,942 psi | 89% | 2795 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,956 psi | 88% | 2867 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,477 psi | 87% | 2900 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 56,565 psi | 89% | 2887 fps | 99.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 56,202 psi | 88% | 2913 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 86% | 57,159 psi | 90% | 2733 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,637 psi | 89% | 2753 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,477 psi | 87% | 2789 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,666 psi | 87% | 2766 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 98% | 56,927 psi | 89% | 2792 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 57,348 psi | 90% | 2785 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 57,696 psi | 90% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,302 psi | 85% | 2776 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 57,217 psi | 90% | 2851 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,376 psi | 87% | 2762 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,796 psi | 87% | 2782 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,404 psi | 85% | 2648 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,389 psi | 85% | 2644 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 57,450 psi | 90% | 2749 fps | 98.2% |
| Somchem S321 | <<locked>> | 84% | 57,725 psi | 90% | 2792 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 57,058 psi | 89% | 2690 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,737 psi | 86% | 2753 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 55,767 psi | 87% | 2785 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,009 psi | 78% | 2799 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 57,580 psi | 90% | 2654 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,636 psi | 86% | 2635 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,333 psi | 88% | 2713 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 57,174 psi | 90% | 2733 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 57,116 psi | 90% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,636 psi | 86% | 2792 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 86% | 57,058 psi | 89% | 2762 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,463 psi | 87% | 2733 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 57,319 psi | 90% | 2851 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,598 psi | 67% | 2684 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,230 psi | 87% | 2776 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 56,913 psi | 89% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 56,159 psi | 88% | 2861 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,882 psi | 55% | 2608 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 55,869 psi | 88% | 2792 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 48,472 psi | 76% | 2569 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,330 psi | 84% | 2687 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,394 psi | 65% | 2503 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,356 psi | 76% | 2651 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 46,253 psi | 72% | 2575 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 39,131 psi | 61% | 2500 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,808 psi | 51% | 2428 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 44,773 psi | 70% | 2608 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 80% | 38,043 psi | 60% | 2461 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,833 psi | 73% | 2615 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 47,297 psi | 74% | 2598 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,683 psi | 64% | 2638 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,652 psi | 59% | 2484 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,480 psi | 63% | 2546 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 84% | 33,257 psi | 52% | 2441 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,518 psi | 51% | 2451 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,443 psi | 48% | 2398 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 35,288 psi | 55% | 2579 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,918 psi | 69% | 2612 fps | 98.4% |
| Bofors RP3 | <<locked>> | 80% | 37,333 psi | 59% | 2487 fps | 98.8% |
| Bofors RP7 | <<locked>> | 90% | 46,166 psi | 72% | 2612 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,588 psi | 76% | 2602 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,701 psi | 72% | 2638 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,546 psi | 79% | 2779 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 80% | 53,693 psi | 84% | 2703 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,116 psi | 60% | 2490 fps | 96.4% |
| Hodgdon H414 | <<locked>> | 90% | 43,004 psi | 67% | 2641 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 92% | 50,024 psi | 78% | 2717 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 45,165 psi | 71% | 2618 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,601 psi | 45% | 2290 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,104 psi | 64% | 2592 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 92% | 45,890 psi | 72% | 2717 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,368 psi | 41% | 1496 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,236 psi | 68% | 2569 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 44,860 psi | 70% | 2612 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,958 psi | 63% | 2493 fps | 98.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,511 psi | 67% | 2516 fps | 95.2% |
| IMR 4350 | <<locked>> | 94% | 46,369 psi | 73% | 2638 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,395 psi | 66% | 2543 fps | 95% |
| IMR 4831 | <<locked>> | 86% | 33,968 psi | 53% | 2441 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 41,452 psi | 65% | 2575 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 80% | 46,833 psi | 73% | 2615 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 52,910 psi | 83% | 2694 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,816 psi | 69% | 2585 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,730 psi | 70% | 2546 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 39,885 psi | 63% | 2500 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 37,130 psi | 58% | 2441 fps | 95.1% |
| Lovex S070 | <<locked>> | 90% | 42,322 psi | 66% | 2569 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 43,932 psi | 69% | 2562 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 44,092 psi | 69% | 2566 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,842 psi | 62% | 2533 fps | 98.5% |
| Norma 204 | <<locked>> | 98% | 52,794 psi | 83% | 2782 fps | 95.7% |
| Norma URP | <<locked>> | 84% | 33,156 psi | 52% | 2428 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 39,392 psi | 62% | 2546 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 39,479 psi | 62% | 2575 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 46,702 psi | 73% | 2621 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,122 psi | 72% | 2638 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,502 psi | 79% | 2661 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,687 psi | 42% | 1532 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,373 psi | 82% | 2690 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,118 psi | 64% | 2526 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,496 psi | 67% | 2644 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,606 psi | 54% | 2516 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,853 psi | 55% | 2497 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 37,405 psi | 59% | 2559 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 47,805 psi | 75% | 2598 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,771 psi | 65% | 2513 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 35,172 psi | 55% | 2434 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 46,166 psi | 72% | 2612 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 84% | 37,130 psi | 58% | 2441 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,816 psi | 69% | 2585 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,885 psi | 63% | 2500 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 42,322 psi | 66% | 2569 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,969 psi | 56% | 2480 fps | 97.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,918 psi | 70% | 2595 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,134 psi | 68% | 2575 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,121 psi | 71% | 2513 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,550 psi | 59% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,164 psi | 69% | 2539 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 50,618 psi | 79% | 2694 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,875 psi | 70% | 2516 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,759 psi | 70% | 2592 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 36,056 psi | 56% | 2441 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 26,063 psi | 41% | 2270 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 50,908 psi | 80% | 2569 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,469 psi | 71% | 2507 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,205 psi | 65% | 2497 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,858 psi | 66% | 2507 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,229 psi | 54% | 2379 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 34,737 psi | 54% | 2434 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 46,876 psi | 73% | 2608 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 40,205 psi | 63% | 2493 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 34,011 psi | 53% | 2431 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 90% | 30,748 psi | 48% | 2421 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,327 psi | 48% | 2303 fps | 96.2% |
| Winchester 748 | <<locked>> | 80% | 46,572 psi | 73% | 2654 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 43,207 psi | 68% | 2644 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,761 psi | 45% | 2418 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,772 psi | 67% | 2582 fps | 99.4% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 99 powders for .300 RCM loaded with the .308 | 175gr | Berger LRBT Target. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,930 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,930 fps. Accurate 4350 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 175.0 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.