Load Specifications
Bullet:.308 | 150gr | Hornady GMX
Bullet Manufacturer:Hornady
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:1:11.5
Load data in caliber .300 RCM with .308 | 150gr | Hornady GMX bullet and 96 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.
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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>> | 90% | 57,464 psi | 90% | 2913 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 57,653 psi | 90% | 3018 fps | 99.2% |
| Accurate 2460 | <<locked>> | 86% | 56,072 psi | 88% | 2940 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 54,795 psi | 86% | 2927 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 53,940 psi | 85% | 2946 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 54,375 psi | 85% | 2966 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,876 psi | 73% | 2910 fps | 97.4% |
| Accurate LT-30 | <<locked>> | 84% | 57,101 psi | 89% | 2861 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 57,537 psi | 90% | 2887 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 56,695 psi | 89% | 3009 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 98% | 57,638 psi | 90% | 3002 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 82% | 54,578 psi | 86% | 2936 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 55,941 psi | 88% | 2963 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 90% | 55,956 psi | 88% | 2946 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 53,983 psi | 85% | 3018 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 56,536 psi | 89% | 3127 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 57,014 psi | 89% | 3025 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 86% | 57,290 psi | 90% | 2923 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 54,433 psi | 85% | 2995 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,775 psi | 73% | 2923 fps | 97.6% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 54,273 psi | 85% | 3087 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 56,420 psi | 88% | 2854 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 56,695 psi | 89% | 3025 fps | 99% |
| Bofors RP3 | <<locked>> | 98% | 57,363 psi | 90% | 3035 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 54,505 psi | 85% | 2900 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 54,984 psi | 86% | 2995 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 56,971 psi | 89% | 3094 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 86% | 56,739 psi | 89% | 2966 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 54,302 psi | 85% | 2943 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 55,463 psi | 87% | 2995 fps | 98.4% |
| Hodgdon H4895 | <<locked>> | 92% | 57,232 psi | 90% | 3022 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,728 psi | 67% | 2802 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 56,057 psi | 88% | 3051 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,432 psi | 54% | 1795 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,201 psi | 87% | 2972 fps | 99.7% |
| IMR 3031 | <<locked>> | 92% | 56,681 psi | 89% | 3009 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 57,188 psi | 90% | 2986 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,360 psi | 85% | 2910 fps | 96% |
| IMR 4198 | <<locked>> | 86% | 57,624 psi | 90% | 2881 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 56,971 psi | 89% | 2979 fps | 96.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,788 psi | 70% | 2854 fps | 97% |
| IMR 4895 | <<locked>> | 94% | 55,782 psi | 87% | 3028 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 90% | 55,941 psi | 88% | 2963 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 86% | 55,927 psi | 88% | 2949 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 55,738 psi | 87% | 2982 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 56,753 psi | 89% | 2936 fps | 99.6% |
| Lovex S062 | <<locked>> | 96% | 56,405 psi | 88% | 2982 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,069 psi | 82% | 2913 fps | 97% |
| Norma 200 | <<locked>> | 82% | 56,768 psi | 89% | 2890 fps | 100% |
| Norma 201 | <<locked>> | 92% | 55,114 psi | 86% | 2953 fps | 99.9% |
| Norma 202 | <<locked>> | 92% | 55,724 psi | 87% | 2959 fps | 100% |
| Norma 203B | <<locked>> | 96% | 56,840 psi | 89% | 3031 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 46,992 psi | 74% | 2910 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 94% | 54,085 psi | 85% | 3005 fps | 99.3% |
| Ramshot TAC | <<locked>> | 90% | 56,797 psi | 89% | 2982 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,680 psi | 87% | 2995 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 88% | 57,305 psi | 90% | 2966 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,737 psi | 54% | 1837 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,535 psi | 87% | 2949 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 56,086 psi | 88% | 2976 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 54,491 psi | 85% | 3061 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 53,969 psi | 85% | 3094 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,746 psi | 73% | 2930 fps | 97.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,848 psi | 75% | 2953 fps | 96.5% |
| Rottweil R 901 | <<locked>> | 90% | 56,028 psi | 88% | 2940 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 55,564 psi | 87% | 2946 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 3028 fps | 99.9% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,069 psi | 82% | 2913 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 92% | 55,738 psi | 87% | 2982 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 56,405 psi | 88% | 2982 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,564 psi | 87% | 2920 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 57,000 psi | 89% | 2602 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 54,781 psi | 86% | 2946 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 55,695 psi | 87% | 3038 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 54,998 psi | 86% | 2900 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,665 psi | 86% | 2953 fps | 98.1% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,259 psi | 87% | 2979 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 57,377 psi | 90% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 57,276 psi | 90% | 2894 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 57,493 psi | 90% | 3005 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 56,318 psi | 88% | 2894 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,027 psi | 85% | 2943 fps | 99.3% |
| Somchem S355ᴾ | <<locked>> | 100% | 57,566 psi | 90% | 3022 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,698 psi | 65% | 2851 fps | 99.1% |
| Vihtavuori N130 | <<locked>> | 88% | 57,145 psi | 90% | 2867 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 57,305 psi | 90% | 2884 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 54,911 psi | 86% | 2920 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 56,420 psi | 88% | 2940 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 56,043 psi | 88% | 2956 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,501 psi | 78% | 2913 fps | 97.7% |
| Vihtavuori N530 | <<locked>> | 90% | 56,652 psi | 89% | 2966 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 54,549 psi | 85% | 2933 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,602 psi | 76% | 2913 fps | 97.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,821 psi | 80% | 2900 fps | 99.4% |
| Winchester 748 | <<locked>> | 90% | 56,057 psi | 88% | 3015 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 92% | 54,737 psi | 86% | 2986 fps | 99.7% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 41,930 psi | 66% | 2674 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 53,853 psi | 84% | 2959 fps | 98.8% |
| Accurate 2460 | <<locked>> | 80% | 45,658 psi | 72% | 2779 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 33,968 psi | 53% | 2569 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,857 psi | 64% | 2726 fps | 99.5% |
| Accurate 4064 | <<locked>> | 80% | 32,140 psi | 50% | 2546 fps | 98.6% |
| Accurate 4350 | <<locked>> | 96% | 40,480 psi | 63% | 2789 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 50,647 psi | 79% | 2766 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,039 psi | 80% | 2792 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,479 psi | 60% | 2674 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 37,202 psi | 58% | 2625 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 50,995 psi | 80% | 2884 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,567 psi | 64% | 2694 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 80% | 39,769 psi | 62% | 2700 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,050 psi | 74% | 2900 fps | 98.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 39,900 psi | 63% | 2802 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,879 psi | 50% | 2536 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,630 psi | 75% | 2782 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 36,753 psi | 58% | 2654 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 94% | 38,667 psi | 61% | 2746 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 88% | 36,056 psi | 56% | 2717 fps | 96.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,661 psi | 78% | 2759 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 40,292 psi | 63% | 2730 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 30,879 psi | 48% | 2523 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,670 psi | 67% | 2694 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,740 psi | 61% | 2703 fps | 98.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,786 psi | 67% | 2844 fps | 97.2% |
| Hodgdon H322 | <<locked>> | 80% | 46,543 psi | 73% | 2812 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,137 psi | 74% | 2828 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 42,380 psi | 66% | 2766 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 38,740 psi | 61% | 2687 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 35,273 psi | 55% | 2635 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,708 psi | 54% | 2641 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,614 psi | 40% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,507 psi | 59% | 2641 fps | 96.7% |
| IMR 3031 | <<locked>> | 80% | 37,739 psi | 59% | 2694 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,709 psi | 58% | 2608 fps | 95.4% |
| IMR 4166 Enduron | <<locked>> | 90% | 50,966 psi | 80% | 2854 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 48,399 psi | 76% | 2749 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 50,401 psi | 79% | 2874 fps | 95% |
| IMR 4831 | <<locked>> | 96% | 39,204 psi | 61% | 2743 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 35,128 psi | 55% | 2628 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 40,567 psi | 64% | 2694 fps | 98.2% |
| Lovex D073.5 | <<locked>> | 80% | 45,542 psi | 71% | 2782 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 36,912 psi | 58% | 2654 fps | 98.8% |
| Lovex S060 | <<locked>> | 80% | 39,189 psi | 61% | 2621 fps | 96.7% |
| Lovex S062 | <<locked>> | 80% | 33,852 psi | 53% | 2556 fps | 96.5% |
| Lovex S065 | <<locked>> | 96% | 45,919 psi | 72% | 2802 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 53,432 psi | 84% | 2844 fps | 100% |
| Norma 201 | <<locked>> | 80% | 37,594 psi | 59% | 2628 fps | 97.6% |
| Norma 202 | <<locked>> | 80% | 37,884 psi | 59% | 2651 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 36,100 psi | 57% | 2641 fps | 95.8% |
| Norma URP | <<locked>> | 96% | 41,031 psi | 64% | 2792 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 82% | 35,578 psi | 56% | 2648 fps | 95.3% |
| Ramshot TAC | <<locked>> | 82% | 43,424 psi | 68% | 2746 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,552 psi | 62% | 2703 fps | 96.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,063 psi | 69% | 2743 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,773 psi | 40% | 1647 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,585 psi | 71% | 2789 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 49,269 psi | 77% | 2861 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 38,174 psi | 60% | 2753 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,283 psi | 46% | 2536 fps | 95.6% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 40,524 psi | 64% | 2808 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 44,759 psi | 70% | 2890 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 41,292 psi | 65% | 2687 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 35,650 psi | 56% | 2579 fps | 97.1% |
| Rottweil R 903 | <<locked>> | 84% | 33,257 psi | 52% | 2575 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 45,919 psi | 72% | 2802 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,912 psi | 58% | 2654 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 33,852 psi | 53% | 2556 fps | 96.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,356 psi | 76% | 2805 fps | 99.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 54,302 psi | 85% | 2566 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,111 psi | 80% | 2887 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 34,882 psi | 55% | 2635 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,530 psi | 76% | 2805 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 41,162 psi | 65% | 2710 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,202 psi | 58% | 2641 fps | 96.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,494 psi | 62% | 2605 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,387 psi | 51% | 2461 fps | 99.1% |
| Somchem S321 | <<locked>> | 80% | 43,598 psi | 68% | 2772 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 38,841 psi | 61% | 2605 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 38,203 psi | 60% | 2654 fps | 96.3% |
| Somchem S355 | <<locked>> | 84% | 34,505 psi | 54% | 2592 fps | 95.8% |
| Somchem S365 | <<locked>> | 90% | 29,950 psi | 47% | 2556 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 44,860 psi | 70% | 2687 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,697 psi | 62% | 2608 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,809 psi | 55% | 2579 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,708 psi | 56% | 2582 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 28,660 psi | 45% | 2421 fps | 95% |
| Vihtavuori N160 | <<locked>> | 94% | 40,611 psi | 64% | 2743 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 40,437 psi | 63% | 2687 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 80% | 34,243 psi | 54% | 2559 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 94% | 39,740 psi | 62% | 2743 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,852 psi | 53% | 2556 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 39,523 psi | 62% | 2726 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,318 psi | 57% | 2641 fps | 96.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 96 powders for .300 RCM loaded with the .308 | 150gr | Hornady GMX. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,127 fps; across all powders the maximum-charge window runs from 1,795 fps to 3,127 fps. Accurate 4350 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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.