Load Specifications
Load data in caliber .308 Norma Mag. with .308 | 125gr | Sierra SPT Pro-Hunter bullet and 96 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>> | 84% | 55,042 psi | 86% | 3215 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 57,334 psi | 90% | 3294 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,143 psi | 85% | 3238 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,912 psi | 88% | 3307 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 57,711 psi | 90% | 3340 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,056 psi | 85% | 3353 fps | 98.6% |
| ADI AR 2206H | <<locked>> | 86% | 54,433 psi | 85% | 3314 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 92% | 55,463 psi | 87% | 3310 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,855 psi | 89% | 3320 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 57,653 psi | 90% | 3304 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,259 psi | 85% | 3435 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,129 psi | 86% | 3330 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,666 psi | 87% | 3337 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,173 psi | 88% | 3360 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,317 psi | 87% | 3419 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,840 psi | 89% | 3465 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,610 psi | 62% | 3094 fps | 97.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,744 psi | 70% | 3271 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,288 psi | 85% | 3320 fps | 98.7% |
| Bofors RP3 | <<locked>> | 92% | 56,391 psi | 88% | 3353 fps | 99.9% |
| Bofors RP7 | <<locked>> | 96% | 56,347 psi | 88% | 3307 fps | 95.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,085 psi | 86% | 3251 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,550 psi | 89% | 3350 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,592 psi | 86% | 3392 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 82% | 57,261 psi | 90% | 3320 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 57,493 psi | 90% | 3366 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 98% | 57,087 psi | 89% | 3409 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 86% | 54,969 psi | 86% | 3327 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,576 psi | 81% | 3281 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,592 psi | 86% | 3360 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,375 psi | 55% | 2103 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,188 psi | 88% | 3327 fps | 99.7% |
| IMR 3031 | <<locked>> | 86% | 54,882 psi | 86% | 3320 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,824 psi | 86% | 3291 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,998 psi | 86% | 3264 fps | 96.2% |
| IMR 4198 | <<locked>> | 82% | 57,653 psi | 90% | 3235 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,869 psi | 89% | 3333 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,839 psi | 86% | 3287 fps | 96.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,752 psi | 86% | 3343 fps | 98.8% |
| IMR 4895 | <<locked>> | 90% | 57,624 psi | 90% | 3399 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 86% | 56,855 psi | 89% | 3320 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 57,246 psi | 90% | 3304 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,201 psi | 85% | 3291 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,305 psi | 90% | 3294 fps | 99.6% |
| Lovex S062 | <<locked>> | 90% | 54,824 psi | 86% | 3291 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 57,711 psi | 90% | 3337 fps | 98% |
| Lovex S070 | <<locked>> | 98% | 55,187 psi | 86% | 3310 fps | 96.5% |
| Norma 201 | <<locked>> | 88% | 56,681 psi | 89% | 3317 fps | 100% |
| Norma 202 | <<locked>> | 88% | 57,116 psi | 90% | 3317 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,390 psi | 87% | 3343 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 56,666 psi | 89% | 3399 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 90% | 56,173 psi | 88% | 3369 fps | 99.5% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,782 psi | 87% | 3389 fps | 97.4% |
| Ramshot TAC | <<locked>> | 86% | 57,522 psi | 90% | 3333 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,985 psi | 89% | 3356 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,346 psi | 85% | 3258 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,795 psi | 56% | 2152 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,086 psi | 88% | 3301 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,085 psi | 85% | 3278 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,536 psi | 89% | 3432 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,507 psi | 89% | 3471 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,070 psi | 85% | 3376 fps | 98.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 57,609 psi | 90% | 3471 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 86% | 57,406 psi | 90% | 3304 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 57,130 psi | 90% | 3310 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 56,246 psi | 88% | 3343 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 96% | 56,347 psi | 88% | 3307 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 98% | 57,711 psi | 90% | 3337 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,201 psi | 85% | 3291 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,824 psi | 86% | 3291 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 98% | 55,187 psi | 86% | 3310 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,360 psi | 85% | 3343 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,854 psi | 88% | 3307 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,362 psi | 88% | 3337 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,563 psi | 86% | 3199 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,027 psi | 86% | 3196 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,723 psi | 86% | 3225 fps | 96.2% |
| Somchem S321 | <<locked>> | 82% | 54,607 psi | 86% | 3294 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 57,551 psi | 90% | 3248 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,347 psi | 87% | 3297 fps | 99.4% |
| Somchem S355 | <<locked>> | 94% | 56,463 psi | 88% | 3340 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,213 psi | 80% | 3343 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 57,479 psi | 90% | 3215 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,781 psi | 86% | 3186 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,753 psi | 89% | 3281 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,244 psi | 85% | 3238 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,520 psi | 85% | 3261 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,622 psi | 87% | 3340 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 86% | 57,464 psi | 90% | 3320 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,101 psi | 88% | 3284 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,882 psi | 86% | 3340 fps | 98.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,482 psi | 68% | 3186 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,434 psi | 88% | 3317 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 57,609 psi | 90% | 3376 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 57,319 psi | 90% | 3412 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,463 psi | 88% | 3346 fps | 99.8% |
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% | 48,617 psi | 76% | 3110 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,606 psi | 84% | 3235 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,365 psi | 65% | 3009 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,515 psi | 76% | 3179 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 39,073 psi | 61% | 2992 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 40,857 psi | 64% | 3084 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 44,947 psi | 70% | 3123 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 38,174 psi | 60% | 2943 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,978 psi | 74% | 3140 fps | 99.2% |
| Alliant AR-Comp | <<locked>> | 80% | 47,282 psi | 74% | 3143 fps | 100% |
| Alliant Power Pro 2000-MR | 65.7 gr | 80% | 40,930 psi | 64% | 3136 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,484 psi | 71% | 3140 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,826 psi | 59% | 2966 fps | 96.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,611 psi | 64% | 3041 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 90% | 40,321 psi | 63% | 3094 fps | 95.4% |
| Alliant Reloder-17 | 66.3 gr | 82% | 35,027 psi | 55% | 2972 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 34,925 psi | 55% | 2963 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 41,510 psi | 65% | 3189 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,338 psi | 69% | 3120 fps | 96.7% |
| Bofors RP3 | <<locked>> | 80% | 37,420 psi | 59% | 2966 fps | 96.9% |
| Bofors RP7 | <<locked>> | 94% | 52,881 psi | 83% | 3241 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,544 psi | 76% | 3130 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,021 psi | 72% | 3156 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,763 psi | 80% | 3320 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 53,693 psi | 84% | 3264 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 43,961 psi | 69% | 3100 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 94% | 50,024 psi | 78% | 3278 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 45,339 psi | 71% | 3140 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 34,722 psi | 54% | 2904 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,307 psi | 65% | 3094 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,295 psi | 41% | 1883 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,511 psi | 68% | 3081 fps | 98% |
| IMR 3031 | <<locked>> | 80% | 44,889 psi | 70% | 3143 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,074 psi | 63% | 2986 fps | 96.2% |
| IMR 4166 Enduron | <<locked>> | 86% | 51,474 psi | 81% | 3196 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 54,273 psi | 85% | 3186 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 53,214 psi | 83% | 3268 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 51,590 psi | 81% | 3225 fps | 95.3% |
| IMR 4831 | <<locked>> | 90% | 39,131 psi | 61% | 3025 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 41,626 psi | 65% | 3077 fps | 97.2% |
| IMR 8208 XBR | <<locked>> | 80% | 46,978 psi | 74% | 3140 fps | 99.2% |
| Lovex D073.5 | <<locked>> | 80% | 53,534 psi | 84% | 3245 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,048 psi | 69% | 3100 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 44,817 psi | 70% | 3058 fps | 98% |
| Lovex S062 | <<locked>> | 80% | 39,943 psi | 63% | 2992 fps | 97.9% |
| Lovex S065 | <<locked>> | 90% | 45,034 psi | 71% | 3094 fps | 95.2% |
| Lovex S070 | <<locked>> | 96% | 51,822 psi | 81% | 3251 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 43,888 psi | 69% | 3071 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 44,309 psi | 69% | 3091 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 40,001 psi | 63% | 3028 fps | 96.7% |
| Norma URP | <<locked>> | 90% | 40,683 psi | 64% | 3077 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 39,639 psi | 62% | 3035 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 96% | 48,718 psi | 76% | 3255 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 47,050 psi | 74% | 3133 fps | 96% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,557 psi | 73% | 3159 fps | 98.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,705 psi | 79% | 3192 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,614 psi | 42% | 1929 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,692 psi | 83% | 3245 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 47,442 psi | 74% | 3146 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,801 psi | 67% | 3156 fps | 96.7% |
| ReloadSwiss RS 60 | 64.7 gr | 80% | 34,838 psi | 55% | 2989 fps | 97.8% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 40,611 psi | 64% | 3097 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 43,439 psi | 68% | 3176 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 47,906 psi | 75% | 3136 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,858 psi | 66% | 3018 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 80% | 35,215 psi | 55% | 2900 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 94% | 52,881 psi | 83% | 3241 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 90% | 45,034 psi | 71% | 3094 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,048 psi | 69% | 3100 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 39,943 psi | 63% | 2992 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 96% | 51,822 psi | 81% | 3251 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,245 psi | 57% | 2953 fps | 95.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,440 psi | 71% | 3107 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,453 psi | 68% | 3084 fps | 97.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,165 psi | 71% | 3031 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,608 psi | 59% | 2871 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 51,097 psi | 80% | 3159 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 51,097 psi | 80% | 3232 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 44,817 psi | 70% | 3028 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,150 psi | 71% | 3104 fps | 97.9% |
| Somchem S355 | <<locked>> | 80% | 36,013 psi | 56% | 2910 fps | 95.9% |
| Somchem S365 | <<locked>> | 86% | 31,850 psi | 50% | 2884 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 50,952 psi | 80% | 3114 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,484 psi | 71% | 3031 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,162 psi | 65% | 3009 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,901 psi | 66% | 3012 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 34,272 psi | 54% | 2838 fps | 96.8% |
| Vihtavuori N160 | <<locked>> | 90% | 42,714 psi | 67% | 3084 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 47,007 psi | 74% | 3136 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 80% | 40,451 psi | 63% | 2989 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 90% | 42,076 psi | 66% | 3084 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 96% | 37,985 psi | 60% | 3054 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 34,983 psi | 55% | 2867 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 46,934 psi | 74% | 3186 fps | 99.6% |
| Winchester 760 | <<locked>> | 94% | 50,024 psi | 78% | 3278 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,960 psi | 67% | 3084 fps | 98% |
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 109 powders for .308 Norma Mag. loaded with the .308 | 125gr | Sierra SPT Pro-Hunter. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,471 fps; across all powders the maximum-charge window runs from 2,103 fps to 3,471 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 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. Accurate 3100, ADI AR 2209, Alliant Reloder-16 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 SPT Pro-Hunter they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 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.