Load Specifications
Load data in caliber .308 Norma Mag. with .308 | 150gr | Alaska Bullet Works Kodiak SP PSPBC bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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>> | 82% | 55,550 psi | 87% | 2953 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,824 psi | 86% | 2976 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 56,202 psi | 88% | 3041 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,956 psi | 89% | 3028 fps | 97.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,774 psi | 72% | 2923 fps | 96.9% |
| Accurate 4064 | <<locked>> | 88% | 54,853 psi | 86% | 3025 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,085 psi | 86% | 3114 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 84% | 54,679 psi | 86% | 3054 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 90% | 55,927 psi | 88% | 3058 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,971 psi | 89% | 3058 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,708 psi | 86% | 2979 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,505 psi | 85% | 3176 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 55,405 psi | 87% | 3068 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,159 psi | 88% | 3081 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,536 psi | 89% | 3104 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,912 psi | 88% | 3176 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 57,479 psi | 90% | 3212 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,192 psi | 68% | 2949 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,907 psi | 77% | 3133 fps | 98.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,679 psi | 86% | 3071 fps | 99.6% |
| Bofors RP3 | <<locked>> | 90% | 57,029 psi | 89% | 3097 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,637 psi | 89% | 3064 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,926 psi | 86% | 2986 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,884 psi | 89% | 3087 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,056 psi | 85% | 3054 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 94% | 54,201 psi | 85% | 3110 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 92% | 54,563 psi | 86% | 3071 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 84% | 55,245 psi | 87% | 3068 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3097 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,201 psi | 87% | 3104 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,491 psi | 85% | 3140 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,752 psi | 56% | 1909 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,550 psi | 89% | 3071 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,637 psi | 87% | 3051 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,201 psi | 87% | 3038 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,984 psi | 86% | 3018 fps | 97.7% |
| IMR 4350 | <<locked>> | 98% | 57,276 psi | 90% | 3097 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,969 psi | 86% | 3045 fps | 97.7% |
| IMR 4831 | <<locked>> | 98% | 55,564 psi | 87% | 3107 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 54,563 psi | 86% | 3081 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 56,971 psi | 89% | 3058 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,810 psi | 86% | 3031 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 57,421 psi | 90% | 3035 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,317 psi | 87% | 3038 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,694 psi | 86% | 3038 fps | 98.7% |
| Lovex S070 | <<locked>> | 96% | 55,840 psi | 88% | 3077 fps | 98.1% |
| Norma 201 | <<locked>> | 86% | 56,913 psi | 89% | 3051 fps | 100% |
| Norma 202 | <<locked>> | 86% | 57,421 psi | 90% | 3051 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,782 psi | 87% | 3087 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,360 psi | 85% | 3087 fps | 95.8% |
| Norma MRPᴾ | <<locked>> | 100% | 48,428 psi | 76% | 3081 fps | 96.4% |
| Norma URP | <<locked>> | 98% | 57,653 psi | 90% | 3159 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 88% | 56,623 psi | 89% | 3114 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 56,463 psi | 88% | 3153 fps | 98.8% |
| Ramshot TAC | <<locked>> | 84% | 57,392 psi | 90% | 3077 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 84% | 57,217 psi | 90% | 3094 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,361 psi | 57% | 1955 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,259 psi | 85% | 3031 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 57,392 psi | 90% | 3176 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 57,159 psi | 90% | 3212 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,013 psi | 86% | 3136 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,099 psi | 85% | 3166 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 82% | 54,418 psi | 85% | 2982 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,421 psi | 90% | 3051 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,898 psi | 89% | 3091 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 56,637 psi | 89% | 3064 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,694 psi | 86% | 3038 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,810 psi | 86% | 3031 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,317 psi | 87% | 3038 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,840 psi | 88% | 3077 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,984 psi | 86% | 3097 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,130 psi | 88% | 3058 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,681 psi | 89% | 3081 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,665 psi | 86% | 2936 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,172 psi | 86% | 2933 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,708 psi | 86% | 2986 fps | 97.7% |
| Somchem S335 | <<locked>> | 86% | 57,566 psi | 90% | 2982 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,724 psi | 87% | 3045 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 57,029 psi | 89% | 3087 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,246 psi | 88% | 3163 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,721 psi | 81% | 3031 fps | 96.6% |
| Vihtavuori N130 | <<locked>> | 82% | 57,638 psi | 90% | 2943 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 55,027 psi | 86% | 2920 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 57,334 psi | 90% | 3012 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,665 psi | 86% | 2979 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,926 psi | 86% | 3012 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,347 psi | 88% | 3097 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 84% | 57,653 psi | 90% | 3058 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,318 psi | 88% | 3025 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,637 psi | 87% | 3104 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,877 psi | 75% | 3035 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,753 psi | 89% | 3074 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,085 psi | 85% | 3051 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,201 psi | 85% | 3110 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,754 psi | 61% | 2963 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,869 psi | 89% | 3091 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% | 52,185 psi | 82% | 2900 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,962 psi | 70% | 2822 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,576 psi | 82% | 2989 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 46,905 psi | 74% | 2851 fps | 95.1% |
| Accurate 3100 | <<locked>> | 96% | 39,668 psi | 62% | 2799 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 42,511 psi | 67% | 2818 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 36,347 psi | 57% | 2746 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 48,167 psi | 75% | 2940 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 40,973 psi | 64% | 2779 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,270 psi | 79% | 2949 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,198 psi | 80% | 2930 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,266 psi | 69% | 2979 fps | 98.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 48,820 psi | 77% | 2953 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,988 psi | 64% | 2805 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,816 psi | 69% | 2874 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 84% | 35,969 psi | 56% | 2756 fps | 95.9% |
| Alliant Reloder-17 | 61 gr | 80% | 35,404 psi | 55% | 2769 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 31,517 psi | 49% | 2654 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 92% | 36,738 psi | 58% | 2851 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,630 psi | 75% | 2946 fps | 98.8% |
| Bofors RP3 | <<locked>> | 80% | 40,741 psi | 64% | 2808 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 46,920 psi | 74% | 2894 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,735 psi | 81% | 2933 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,647 psi | 78% | 2972 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,539 psi | 65% | 2815 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 88% | 44,280 psi | 69% | 2920 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 90% | 51,097 psi | 80% | 3009 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 48,675 psi | 76% | 2953 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 31,125 psi | 49% | 2589 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,947 psi | 70% | 2923 fps | 99.6% |
| Hodgdon Superformance | 72.6 gr | 90% | 47,210 psi | 74% | 3005 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,643 psi | 42% | 1709 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,615 psi | 73% | 2900 fps | 99.5% |
| IMR 3031 | <<locked>> | 80% | 48,646 psi | 76% | 2943 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,004 psi | 67% | 2815 fps | 98.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,513 psi | 71% | 2841 fps | 95.6% |
| IMR 4350 | <<locked>> | 92% | 47,514 psi | 74% | 2923 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 45,716 psi | 72% | 2871 fps | 95.6% |
| IMR 4831 | <<locked>> | 84% | 35,070 psi | 55% | 2697 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 44,904 psi | 70% | 2904 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 80% | 50,270 psi | 79% | 2949 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,906 psi | 75% | 2920 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,718 psi | 75% | 2871 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 43,033 psi | 67% | 2818 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 40,205 psi | 63% | 2759 fps | 95.6% |
| Lovex S070 | <<locked>> | 88% | 43,352 psi | 68% | 2844 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 47,108 psi | 74% | 2887 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 47,718 psi | 75% | 2897 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,178 psi | 68% | 2861 fps | 98.8% |
| Norma 204 | <<locked>> | 94% | 50,778 psi | 80% | 3025 fps | 95% |
| Norma MRP | <<locked>> | 98% | 45,194 psi | 71% | 3015 fps | 95.4% |
| Norma URP | <<locked>> | 84% | 36,332 psi | 57% | 2743 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 43,033 psi | 67% | 2874 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 88% | 40,509 psi | 63% | 2848 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 50,372 psi | 79% | 2956 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,082 psi | 78% | 2979 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,079 psi | 42% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,655 psi | 65% | 2792 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,659 psi | 73% | 2989 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,681 psi | 59% | 2841 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 35,998 psi | 56% | 2759 fps | 95.3% |
| ReloadSwiss RS 70 | 66.6 gr | 86% | 38,232 psi | 60% | 2828 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 51,242 psi | 80% | 2933 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,889 psi | 70% | 2838 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 38,450 psi | 60% | 2749 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 46,920 psi | 74% | 2894 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 84% | 40,205 psi | 63% | 2759 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,906 psi | 75% | 2920 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,033 psi | 67% | 2818 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 88% | 43,352 psi | 68% | 2844 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,378 psi | 62% | 2802 fps | 97.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,762 psi | 76% | 2930 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,717 psi | 73% | 2907 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,182 psi | 76% | 2835 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,364 psi | 63% | 2690 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 45,165 psi | 71% | 2815 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 47,921 psi | 75% | 2835 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,457 psi | 76% | 2927 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 38,972 psi | 61% | 2753 fps | 98.3% |
| Somchem S365 | <<locked>> | 80% | 28,616 psi | 45% | 2572 fps | 96.2% |
| Somchem S385 | <<locked>> | 98% | 48,573 psi | 76% | 2972 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 54,186 psi | 85% | 2897 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,617 psi | 76% | 2825 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,599 psi | 70% | 2815 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,179 psi | 71% | 2825 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,231 psi | 58% | 2687 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 35,578 psi | 56% | 2690 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 50,444 psi | 79% | 2943 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,613 psi | 68% | 2812 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 37,391 psi | 59% | 2746 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 90% | 34,301 psi | 54% | 2736 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,880 psi | 52% | 2602 fps | 96.8% |
| Winchester 748 | <<locked>> | 80% | 50,604 psi | 79% | 2992 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 44,483 psi | 70% | 2927 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,762 psi | 47% | 2674 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,470 psi | 73% | 2913 fps | 99.6% |
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 116 powders for .308 Norma Mag. loaded with the .308 | 150gr | Alaska Bullet Works Kodiak SP PSPBC. Alliant Reloder-17 delivers the highest muzzle velocity at 3,212 fps; across all powders the maximum-charge window runs from 1,909 fps to 3,212 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 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 150.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2209 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .308 Norma Mag. with the .308 | 150gr | Alaska Bullet Works Kodiak SP PSPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate High Country, ADI AR 2213, Alliant Reloder-22 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.