Load Specifications
Load data in caliber .308 Norma Mag. with .308 | 125gr | Sierra MatchKing bullet and 94 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, ReloadSwiss RS 60 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>> | 86% | 55,085 psi | 86% | 3202 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 57,348 psi | 90% | 3281 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 57,188 psi | 90% | 3271 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,434 psi | 87% | 3284 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 56,942 psi | 89% | 3317 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,084 psi | 83% | 3317 fps | 98% |
| Accurate LT-30 | <<locked>> | 82% | 57,145 psi | 90% | 3192 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 57,551 psi | 90% | 3222 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 54,201 psi | 85% | 3291 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 94% | 55,158 psi | 86% | 3281 fps | 98.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,768 psi | 89% | 3301 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 88% | 57,116 psi | 90% | 3287 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,824 psi | 86% | 3366 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 57,682 psi | 90% | 3474 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,868 psi | 86% | 3307 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,955 psi | 86% | 3307 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,433 psi | 85% | 3209 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,738 psi | 87% | 3333 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,227 psi | 80% | 3320 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,130 psi | 88% | 3435 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 56,826 psi | 89% | 3179 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,041 psi | 85% | 3294 fps | 98.3% |
| Bofors RP3 | <<locked>> | 94% | 55,796 psi | 87% | 3327 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,100 psi | 86% | 3228 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,159 psi | 88% | 3330 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,317 psi | 85% | 3369 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 84% | 57,493 psi | 90% | 3307 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,897 psi | 86% | 3271 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,956 psi | 89% | 3337 fps | 98.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3369 fps | 96% |
| Hodgdon H4895 | <<locked>> | 88% | 54,694 psi | 86% | 3304 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,311 psi | 74% | 3186 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 57,653 psi | 90% | 3392 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,027 psi | 55% | 2067 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,014 psi | 88% | 3307 fps | 99.5% |
| IMR 3031 | <<locked>> | 88% | 54,346 psi | 85% | 3301 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,578 psi | 86% | 3264 fps | 98.8% |
| IMR 4198 | <<locked>> | 82% | 54,578 psi | 86% | 3173 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,169 psi | 79% | 3248 fps | 97.6% |
| IMR 4895 | <<locked>> | 92% | 57,159 psi | 90% | 3373 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 88% | 56,768 psi | 89% | 3301 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 84% | 57,130 psi | 90% | 3284 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 57,479 psi | 90% | 3327 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 57,435 psi | 90% | 3274 fps | 99.4% |
| Lovex S062 | <<locked>> | 92% | 54,433 psi | 85% | 3268 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 57,217 psi | 90% | 3307 fps | 97.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,636 psi | 86% | 3281 fps | 95.9% |
| Norma 201 | <<locked>> | 90% | 56,275 psi | 88% | 3291 fps | 99.8% |
| Norma 202 | <<locked>> | 90% | 56,913 psi | 89% | 3297 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,911 psi | 86% | 3320 fps | 99.2% |
| Norma URPᴾ | <<locked>> | 100% | 52,257 psi | 82% | 3307 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 92% | 55,564 psi | 87% | 3343 fps | 99.2% |
| Ramshot TAC | <<locked>> | 88% | 57,624 psi | 90% | 3310 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,000 psi | 89% | 3337 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,389 psi | 85% | 3238 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,462 psi | 56% | 2116 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,260 psi | 88% | 3284 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 57,566 psi | 90% | 3314 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,130 psi | 88% | 3406 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,956 psi | 88% | 3448 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,707 psi | 83% | 3337 fps | 97.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,185 psi | 83% | 3363 fps | 97.3% |
| Rottweil R 901 | <<locked>> | 88% | 57,130 psi | 90% | 3281 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,826 psi | 89% | 3287 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 55,361 psi | 87% | 3310 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 57,217 psi | 90% | 3307 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 90% | 57,479 psi | 90% | 3327 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,433 psi | 85% | 3268 fps | 99.8% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,636 psi | 86% | 3281 fps | 95.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,941 psi | 88% | 3245 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 57,392 psi | 90% | 3383 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,434 psi | 87% | 3238 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,738 psi | 87% | 3284 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,347 psi | 88% | 3317 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,766 psi | 86% | 3186 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,839 psi | 86% | 3176 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 54,534 psi | 85% | 3274 fps | 99.8% |
| Somchem S335 | <<locked>> | 90% | 57,261 psi | 90% | 3228 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,201 psi | 87% | 3274 fps | 99.2% |
| Somchem S355 | <<locked>> | 96% | 55,912 psi | 88% | 3314 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,702 psi | 73% | 3245 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 86% | 57,711 psi | 90% | 3202 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,839 psi | 86% | 3173 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,289 psi | 88% | 3258 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 57,609 psi | 90% | 3274 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 57,711 psi | 90% | 3297 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,984 psi | 86% | 3310 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 88% | 57,464 psi | 90% | 3304 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 55,695 psi | 87% | 3264 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,940 psi | 85% | 3307 fps | 97.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,869 psi | 88% | 3287 fps | 99.7% |
| Winchester 748 | <<locked>> | 88% | 57,290 psi | 90% | 3356 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 3379 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,231 psi | 88% | 3323 fps | 99.6% |
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% | 45,484 psi | 71% | 3041 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,879 psi | 78% | 3156 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,247 psi | 60% | 2933 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,092 psi | 71% | 3100 fps | 99.6% |
| Accurate 4064 | <<locked>> | 80% | 36,143 psi | 57% | 2910 fps | 98.9% |
| Accurate 4350 | <<locked>> | 94% | 42,743 psi | 67% | 3117 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 53,708 psi | 84% | 3136 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 54,099 psi | 85% | 3166 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,901 psi | 66% | 3038 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 40,553 psi | 64% | 2986 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,918 psi | 69% | 3058 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 80% | 43,743 psi | 69% | 3071 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,155 psi | 80% | 3294 fps | 99.1% |
| Alliant Power Pro 2000-MR | 62.9 gr | 82% | 40,712 psi | 64% | 3110 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,380 psi | 66% | 3054 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,085 psi | 55% | 2884 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,300 psi | 80% | 3159 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 40,350 psi | 63% | 3018 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,482 psi | 67% | 3127 fps | 95.6% |
| Alliant Reloder-17 | 65 gr | 86% | 37,173 psi | 58% | 3018 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,156 psi | 83% | 3123 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,089 psi | 64% | 3031 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 34,621 psi | 54% | 2881 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,934 psi | 72% | 3061 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,670 psi | 67% | 3074 fps | 98.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,833 psi | 73% | 3225 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 80% | 50,314 psi | 79% | 3192 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,358 psi | 80% | 3212 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 43,511 psi | 68% | 3074 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 98% | 52,663 psi | 83% | 3310 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 42,235 psi | 66% | 3054 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 36,477 psi | 57% | 2936 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,218 psi | 60% | 3005 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,933 psi | 41% | 1850 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,727 psi | 64% | 3002 fps | 96.9% |
| IMR 3031 | <<locked>> | 80% | 41,582 psi | 65% | 3064 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 39,958 psi | 63% | 2966 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 51,387 psi | 81% | 3120 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 41,046 psi | 64% | 3054 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 38,580 psi | 60% | 2989 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 43,918 psi | 69% | 3058 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 80% | 49,719 psi | 78% | 3159 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 40,857 psi | 64% | 3018 fps | 99% |
| Lovex S060 | <<locked>> | 80% | 42,293 psi | 66% | 2982 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 37,275 psi | 58% | 2913 fps | 96.8% |
| Lovex S065 | <<locked>> | 94% | 47,529 psi | 74% | 3130 fps | 95.4% |
| Lovex S070 | <<locked>> | 98% | 51,300 psi | 80% | 3219 fps | 95% |
| Norma 201 | <<locked>> | 80% | 41,118 psi | 64% | 2995 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 41,292 psi | 65% | 3012 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 37,057 psi | 58% | 2940 fps | 95.2% |
| Norma URP | <<locked>> | 94% | 42,786 psi | 67% | 3114 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 82% | 39,247 psi | 62% | 3012 fps | 95.7% |
| Ramshot TAC | <<locked>> | 82% | 47,108 psi | 74% | 3114 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,381 psi | 68% | 3074 fps | 97.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,659 psi | 75% | 3114 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,252 psi | 41% | 1893 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,458 psi | 78% | 3166 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 50,415 psi | 79% | 3186 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,233 psi | 61% | 3061 fps | 95.2% |
| ReloadSwiss RS 60 | 60.5 gr | 80% | 32,358 psi | 51% | 2894 fps | 96.1% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 42,670 psi | 67% | 3133 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 46,238 psi | 72% | 3219 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 45,020 psi | 71% | 3061 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 39,160 psi | 61% | 2936 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 34,708 psi | 54% | 2874 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 47,529 psi | 74% | 3130 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,857 psi | 64% | 3018 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 37,275 psi | 58% | 2913 fps | 96.8% |
| Shooters World SW4350 | <<locked>> | 98% | 51,300 psi | 80% | 3219 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,272 psi | 82% | 3186 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 38,406 psi | 60% | 2995 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,967 psi | 81% | 3182 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 45,266 psi | 71% | 3084 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,495 psi | 63% | 2999 fps | 96.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,496 psi | 67% | 2963 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,186 psi | 55% | 2799 fps | 99.2% |
| Somchem S321 | <<locked>> | 80% | 47,587 psi | 75% | 3146 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 42,192 psi | 66% | 2963 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 41,829 psi | 66% | 3015 fps | 96.6% |
| Somchem S355 | <<locked>> | 82% | 35,694 psi | 56% | 2887 fps | 95.3% |
| Somchem S365 | <<locked>> | 90% | 33,489 psi | 52% | 2920 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 48,080 psi | 75% | 3051 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,757 psi | 67% | 2963 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,232 psi | 60% | 2933 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,073 psi | 61% | 2933 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 80% | 31,763 psi | 50% | 2759 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 92% | 42,003 psi | 66% | 3054 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 44,092 psi | 69% | 3054 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 80% | 37,724 psi | 59% | 2913 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 94% | 44,179 psi | 69% | 3117 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 37,144 psi | 58% | 2904 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 43,366 psi | 68% | 3097 fps | 99% |
| Winchester 760 | <<locked>> | 98% | 52,663 psi | 83% | 3310 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,943 psi | 63% | 3002 fps | 96.8% |
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 110 powders for .308 Norma Mag. loaded with the .308 | 125gr | Sierra MatchKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,474 fps; across all powders the maximum-charge window runs from 2,067 fps to 3,474 fps. Accurate 4350 gives the best case fill at 100 %, and 110 of the 110 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 125.0 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .308 Norma Mag. with the .308 | 125gr | Sierra MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-26, Hodgdon H4350, Hodgdon Superformance 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.