Load Specifications
Bullet:.308 | 150gr | Swift A-Frame
Bullet Manufacturer:Swift
Bullet Weight:150 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:1:16.0
Load data in caliber .300 RCM with .308 | 150gr | Swift A-Frame bullet and 104 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.
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% | 55,608 psi | 87% | 2907 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,230 psi | 85% | 2933 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 57,566 psi | 90% | 2972 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,231 psi | 88% | 2999 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 57,290 psi | 90% | 2966 fps | 96.3% |
| Accurate 4064 | <<locked>> | 94% | 57,522 psi | 90% | 3022 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,548 psi | 84% | 3045 fps | 98.9% |
| Accurate LT-30 | <<locked>> | 82% | 57,682 psi | 90% | 2890 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 54,926 psi | 86% | 3005 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 94% | 55,753 psi | 87% | 2999 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,464 psi | 90% | 3009 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,273 psi | 85% | 2936 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,738 psi | 87% | 3068 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,462 psi | 85% | 3120 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,579 psi | 87% | 3025 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,245 psi | 87% | 2910 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,275 psi | 88% | 3045 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,605 psi | 81% | 3041 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,333 psi | 88% | 3143 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,796 psi | 58% | 2753 fps | 96.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,246 psi | 90% | 2887 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,578 psi | 86% | 3015 fps | 99.1% |
| Bofors RP3 | <<locked>> | 94% | 56,217 psi | 88% | 3038 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,652 psi | 89% | 3002 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,825 psi | 87% | 2943 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,753 psi | 89% | 3038 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,839 psi | 86% | 3081 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 82% | 54,447 psi | 85% | 2953 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,521 psi | 87% | 2979 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 57,580 psi | 90% | 3051 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 3091 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 98% | 57,580 psi | 90% | 3058 fps | 96% |
| Hodgdon H4895 | <<locked>> | 88% | 55,434 psi | 87% | 3015 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,776 psi | 75% | 2917 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,592 psi | 86% | 3045 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,157 psi | 85% | 3071 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,273 psi | 55% | 1837 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,811 psi | 89% | 3022 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 55,056 psi | 86% | 3002 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,288 psi | 87% | 2982 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,608 psi | 87% | 2959 fps | 96.9% |
| IMR 4198 | <<locked>> | 82% | 55,317 psi | 87% | 2871 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,040 psi | 83% | 2966 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,998 psi | 86% | 2979 fps | 96.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,705 psi | 79% | 2976 fps | 98.6% |
| IMR 4895 | <<locked>> | 92% | 57,696 psi | 90% | 3077 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 57,464 psi | 90% | 3009 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,157 psi | 85% | 2943 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,462 psi | 85% | 2982 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,723 psi | 86% | 2930 fps | 99.7% |
| Lovex S062 | <<locked>> | 92% | 54,940 psi | 86% | 2979 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 57,638 psi | 90% | 3025 fps | 98.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,013 psi | 86% | 3005 fps | 97.1% |
| Norma 201 | <<locked>> | 90% | 56,971 psi | 89% | 2999 fps | 100% |
| Norma 202 | <<locked>> | 90% | 57,479 psi | 90% | 3002 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,434 psi | 87% | 3031 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 52,692 psi | 83% | 3028 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 92% | 56,086 psi | 88% | 3058 fps | 99.7% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,561 psi | 81% | 3015 fps | 97.1% |
| Ramshot TAC | <<locked>> | 86% | 54,375 psi | 85% | 2969 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,435 psi | 90% | 3045 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,868 psi | 86% | 2956 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,665 psi | 56% | 1880 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 57,000 psi | 89% | 2992 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,346 psi | 85% | 2976 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,695 psi | 89% | 3114 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 56,202 psi | 88% | 3150 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,069 psi | 83% | 3061 fps | 98.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,345 psi | 84% | 3087 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 86% | 54,650 psi | 86% | 2936 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 57,421 psi | 90% | 2995 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 56,057 psi | 88% | 3028 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 98% | 56,652 psi | 89% | 3002 fps | 96.5% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 57,638 psi | 90% | 3025 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,462 psi | 85% | 2982 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,940 psi | 86% | 2979 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,013 psi | 86% | 3005 fps | 97.1% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,768 psi | 89% | 2963 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,157 psi | 85% | 3035 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,101 psi | 88% | 2933 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,231 psi | 88% | 3002 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,768 psi | 89% | 3025 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,230 psi | 87% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,216 psi | 87% | 2887 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,578 psi | 86% | 2920 fps | 96.6% |
| Somchem S321 | <<locked>> | 84% | 55,187 psi | 86% | 2992 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,650 psi | 86% | 2890 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,724 psi | 87% | 2992 fps | 99.7% |
| Somchem S355 | <<locked>> | 96% | 56,304 psi | 88% | 3025 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,021 psi | 74% | 2976 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 54,955 psi | 86% | 2854 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,332 psi | 87% | 2877 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,855 psi | 89% | 2959 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,520 psi | 85% | 2930 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,462 psi | 85% | 2956 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,390 psi | 87% | 3028 fps | 99% |
| Vihtavuori N530 | <<locked>> | 86% | 54,462 psi | 85% | 2956 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,347 psi | 88% | 2976 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,462 psi | 85% | 3035 fps | 98.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,639 psi | 62% | 2835 fps | 96.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,202 psi | 88% | 3009 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,215 psi | 85% | 3005 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 56,869 psi | 89% | 3097 fps | 97.3% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,550 psi | 89% | 3031 fps | 99.9% |
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% | 46,282 psi | 73% | 2762 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,546 psi | 79% | 2877 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,914 psi | 61% | 2677 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,847 psi | 72% | 2831 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,751 psi | 84% | 2910 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 36,796 psi | 58% | 2661 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 37,579 psi | 59% | 2736 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 54,331 psi | 85% | 2844 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 42,569 psi | 67% | 2779 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 36,201 psi | 57% | 2618 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,643 psi | 70% | 2792 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 44,396 psi | 70% | 2789 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,069 psi | 82% | 3009 fps | 99.7% |
| Alliant Power Pro 2000-MR | 54 gr | 80% | 38,537 psi | 60% | 2792 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,708 psi | 56% | 2644 fps | 97.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,924 psi | 81% | 2864 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,363 psi | 60% | 2707 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 90% | 37,797 psi | 59% | 2749 fps | 95.4% |
| Alliant Reloder-17 | 54.5 gr | 82% | 32,895 psi | 52% | 2651 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 34,693 psi | 54% | 2697 fps | 96% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,838 psi | 84% | 2841 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,771 psi | 65% | 2779 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 35,244 psi | 55% | 2644 fps | 97.1% |
| Bofors RP7 | <<locked>> | 94% | 49,966 psi | 78% | 2887 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,383 psi | 73% | 2785 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,236 psi | 68% | 2808 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,703 psi | 75% | 2959 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 50,908 psi | 80% | 2897 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,054 psi | 82% | 2927 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 38,609 psi | 61% | 2700 fps | 95% |
| Hodgdon H414 | <<locked>> | 96% | 49,516 psi | 78% | 2972 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 96% | 53,983 psi | 85% | 2999 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 42,946 psi | 67% | 2792 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 32,706 psi | 51% | 2589 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,928 psi | 61% | 2756 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 96% | 50,386 psi | 79% | 3002 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 41% | 1644 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,176 psi | 65% | 2740 fps | 98.1% |
| IMR 3031 | <<locked>> | 80% | 42,366 psi | 66% | 2795 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,985 psi | 60% | 2657 fps | 96.4% |
| IMR 4166 Enduron | <<locked>> | 86% | 48,921 psi | 77% | 2844 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 52,272 psi | 82% | 2825 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 49,951 psi | 78% | 2910 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,704 psi | 76% | 2867 fps | 95.2% |
| IMR 4831 | <<locked>> | 90% | 36,463 psi | 57% | 2694 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 39,276 psi | 62% | 2740 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 80% | 44,643 psi | 70% | 2792 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 50,517 psi | 79% | 2884 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,394 psi | 65% | 2759 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 42,772 psi | 67% | 2717 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 37,811 psi | 59% | 2664 fps | 98.1% |
| Lovex S065 | <<locked>> | 90% | 42,424 psi | 66% | 2756 fps | 95.2% |
| Lovex S070 | <<locked>> | 96% | 48,544 psi | 76% | 2894 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 41,727 psi | 65% | 2733 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 41,989 psi | 66% | 2749 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 37,739 psi | 59% | 2694 fps | 96.8% |
| Norma URP | <<locked>> | 90% | 37,942 psi | 59% | 2740 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 37,202 psi | 58% | 2700 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 96% | 45,252 psi | 71% | 2897 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 44,628 psi | 70% | 2792 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,019 psi | 69% | 2815 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,182 psi | 76% | 2841 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,426 psi | 41% | 1680 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,053 psi | 78% | 2884 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 44,614 psi | 70% | 2799 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,074 psi | 63% | 2808 fps | 96.9% |
| ReloadSwiss RS 60 | 53.2 gr | 80% | 32,808 psi | 51% | 2664 fps | 97.9% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 40,176 psi | 63% | 2818 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,540 psi | 68% | 2894 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 45,716 psi | 72% | 2785 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,784 psi | 62% | 2684 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 33,011 psi | 52% | 2579 fps | 96% |
| Rottweil R 907 | <<locked>> | 94% | 49,966 psi | 78% | 2887 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,424 psi | 66% | 2756 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,394 psi | 65% | 2759 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 37,811 psi | 59% | 2664 fps | 98.1% |
| Shooters World SW4350 | <<locked>> | 96% | 48,544 psi | 76% | 2894 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,895 psi | 83% | 2904 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,171 psi | 54% | 2631 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,692 psi | 83% | 2884 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,786 psi | 67% | 2759 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,191 psi | 65% | 2746 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,047 psi | 67% | 2694 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,694 psi | 56% | 2552 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,921 psi | 75% | 2808 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 48,327 psi | 76% | 2877 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 42,786 psi | 67% | 2697 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,525 psi | 67% | 2762 fps | 97.9% |
| Somchem S355 | <<locked>> | 80% | 34,040 psi | 53% | 2592 fps | 96.1% |
| Somchem S365 | <<locked>> | 86% | 29,849 psi | 47% | 2569 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 48,675 psi | 76% | 2766 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,308 psi | 68% | 2690 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,885 psi | 61% | 2674 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,581 psi | 62% | 2677 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 32,242 psi | 51% | 2526 fps | 97% |
| Vihtavuori N160 | <<locked>> | 88% | 37,333 psi | 59% | 2690 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 44,788 psi | 70% | 2789 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 38,247 psi | 60% | 2664 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 39,218 psi | 61% | 2746 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 96% | 34,751 psi | 54% | 2717 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 32,909 psi | 52% | 2552 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 44,208 psi | 69% | 2835 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 49,777 psi | 78% | 2976 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,567 psi | 64% | 2749 fps | 98.1% |
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 104 powders for .300 RCM loaded with the .308 | 150gr | Swift A-Frame. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,150 fps; across all powders the maximum-charge window runs from 1,837 fps to 3,150 fps. Accurate 4350 gives the best case fill at 100 %, and 104 of the 104 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 150.0 gr projectile in 0.308" calls for a 1:16.0 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. Alliant Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .300 RCM with the .308 | 150gr | 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.