Load Specifications
Load data in caliber 7 mm Rem. SA Ultra Mag. with .284 | 120gr | Sierra Pro-Hunter bullet and 97 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% | 55,535 psi | 85% | 3061 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 58,465 psi | 90% | 3136 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 56,376 psi | 87% | 3156 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 57,246 psi | 88% | 3140 fps | 97.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,788 psi | 70% | 3022 fps | 96.6% |
| Accurate 4064 | <<locked>> | 90% | 58,624 psi | 90% | 3189 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,535 psi | 85% | 3232 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 58,378 psi | 90% | 3225 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,014 psi | 86% | 3169 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 57,145 psi | 88% | 3169 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 58,465 psi | 90% | 3140 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,766 psi | 84% | 3294 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,231 psi | 87% | 3192 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,782 psi | 87% | 3219 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,246 psi | 87% | 3291 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 57,696 psi | 89% | 3327 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,250 psi | 67% | 3051 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,182 psi | 76% | 3241 fps | 98.8% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 58,523 psi | 90% | 3241 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 57,130 psi | 88% | 3209 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,797 psi | 87% | 3176 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 84% | 58,682 psi | 90% | 3150 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,942 psi | 88% | 3199 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 57,856 psi | 89% | 3222 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 96% | 58,160 psi | 89% | 3281 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 94% | 58,189 psi | 90% | 3238 fps | 97% |
| Hodgdon H4895 | <<locked>> | 84% | 55,419 psi | 85% | 3179 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,260 psi | 87% | 3205 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,317 psi | 85% | 3215 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,897 psi | 84% | 3255 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,723 psi | 55% | 1991 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,521 psi | 87% | 3182 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,709 psi | 86% | 3166 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,361 psi | 85% | 3150 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 58,537 psi | 90% | 3182 fps | 98.1% |
| IMR 4350 | <<locked>> | 98% | 57,479 psi | 88% | 3205 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 94% | 58,595 psi | 90% | 3209 fps | 98.1% |
| IMR 4831 | <<locked>> | 98% | 55,738 psi | 86% | 3215 fps | 99.6% |
| IMR 4895 | <<locked>> | 88% | 58,276 psi | 90% | 3251 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 57,145 psi | 88% | 3169 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 58,740 psi | 90% | 3199 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 57,493 psi | 88% | 3146 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,274 psi | 85% | 3146 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 58,349 psi | 90% | 3202 fps | 99.1% |
| Lovex S070 | <<locked>> | 96% | 55,999 psi | 86% | 3186 fps | 98% |
| Norma 201 | <<locked>> | 86% | 57,072 psi | 88% | 3166 fps | 100% |
| Norma 202 | <<locked>> | 86% | 57,682 psi | 89% | 3166 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,999 psi | 86% | 3202 fps | 99.9% |
| Norma 204 | <<locked>> | 98% | 58,479 psi | 90% | 3261 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 48,791 psi | 75% | 3192 fps | 96.3% |
| Norma URP | <<locked>> | 98% | 58,001 psi | 89% | 3271 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 88% | 56,811 psi | 87% | 3228 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 98% | 56,681 psi | 87% | 3264 fps | 98.7% |
| Ramshot TAC | <<locked>> | 84% | 57,406 psi | 88% | 3189 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 57,363 psi | 88% | 3209 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 57,986 psi | 89% | 3173 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,201 psi | 56% | 2037 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 58,044 psi | 89% | 3202 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 57,551 psi | 89% | 3291 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 57,479 psi | 88% | 3330 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,158 psi | 85% | 3248 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 58,349 psi | 90% | 3346 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 84% | 57,870 psi | 89% | 3146 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,479 psi | 88% | 3163 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,985 psi | 88% | 3202 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 56,797 psi | 87% | 3176 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 96% | 58,349 psi | 90% | 3202 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 86% | 58,740 psi | 90% | 3199 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,274 psi | 85% | 3146 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,999 psi | 86% | 3186 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,259 psi | 85% | 3212 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,028 psi | 86% | 3163 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,840 psi | 87% | 3192 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 58,320 psi | 90% | 3100 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 58,711 psi | 90% | 3091 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 58,740 psi | 90% | 3153 fps | 98.2% |
| Somchem S321 | <<locked>> | 82% | 58,552 psi | 90% | 3202 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 57,754 psi | 89% | 3094 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,666 psi | 86% | 3153 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 57,203 psi | 88% | 3199 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,420 psi | 87% | 3271 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,953 psi | 80% | 3136 fps | 96.4% |
| Vihtavuori N130 | <<locked>> | 82% | 57,638 psi | 89% | 3054 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 58,624 psi | 90% | 3081 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 57,624 psi | 89% | 3123 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 58,378 psi | 90% | 3140 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 58,755 psi | 90% | 3173 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,768 psi | 87% | 3212 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 84% | 57,754 psi | 89% | 3169 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,449 psi | 87% | 3133 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,767 psi | 86% | 3212 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,182 psi | 74% | 3143 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,927 psi | 88% | 3182 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 58,030 psi | 89% | 3219 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 58,160 psi | 89% | 3281 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,073 psi | 60% | 3068 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,942 psi | 88% | 3199 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% | 52,025 psi | 80% | 3009 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,179 psi | 70% | 2930 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,533 psi | 81% | 3094 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 49,908 psi | 77% | 3012 fps | 95.7% |
| Accurate 3100 | <<locked>> | 98% | 42,685 psi | 66% | 2959 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 42,699 psi | 66% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 36,434 psi | 56% | 2844 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 48,240 psi | 74% | 3048 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 41,002 psi | 63% | 2881 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,328 psi | 77% | 3054 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 51,213 psi | 79% | 3038 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,396 psi | 68% | 3087 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,814 psi | 63% | 2904 fps | 98.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,874 psi | 67% | 2976 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 84% | 36,100 psi | 56% | 2854 fps | 95.6% |
| Alliant Reloder-17 | 54.3 gr | 80% | 35,505 psi | 55% | 2867 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 90% | 31,517 psi | 48% | 2743 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 92% | 36,753 psi | 57% | 2946 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,688 psi | 73% | 3051 fps | 98.7% |
| Bofors RP3 | <<locked>> | 80% | 40,959 psi | 63% | 2913 fps | 99% |
| Bofors RP7 | <<locked>> | 88% | 47,036 psi | 72% | 2995 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,779 psi | 80% | 3041 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,792 psi | 77% | 3081 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,466 psi | 64% | 2910 fps | 96.6% |
| Hodgdon H414 | <<locked>> | 88% | 44,498 psi | 68% | 3028 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 90% | 51,155 psi | 79% | 3114 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 48,733 psi | 75% | 3061 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 31,227 psi | 48% | 2684 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,976 psi | 69% | 3028 fps | 99.5% |
| Hodgdon Superformance | 64.6 gr | 90% | 47,384 psi | 73% | 3110 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,731 psi | 41% | 1785 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,601 psi | 72% | 3005 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 48,617 psi | 75% | 3051 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,076 psi | 66% | 2920 fps | 98.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,469 psi | 70% | 2940 fps | 95.4% |
| IMR 4350 | <<locked>> | 92% | 47,427 psi | 73% | 3025 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 45,788 psi | 70% | 2972 fps | 95.4% |
| IMR 4831 | <<locked>> | 84% | 35,085 psi | 54% | 2792 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 44,962 psi | 69% | 3009 fps | 99% |
| IMR 8208 XBR | <<locked>> | 80% | 50,328 psi | 77% | 3054 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 47,979 psi | 74% | 3028 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,819 psi | 74% | 2976 fps | 99.4% |
| Lovex S062 | <<locked>> | 80% | 43,105 psi | 66% | 2923 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 40,190 psi | 62% | 2854 fps | 95.3% |
| Lovex S070 | <<locked>> | 88% | 43,584 psi | 67% | 2946 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 47,282 psi | 73% | 2999 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 47,514 psi | 73% | 2999 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,236 psi | 67% | 2963 fps | 98.7% |
| Norma 204 | <<locked>> | 96% | 54,679 psi | 84% | 3196 fps | 95.7% |
| Norma MRP | <<locked>> | 98% | 45,382 psi | 70% | 3120 fps | 95.2% |
| Norma URP | <<locked>> | 84% | 36,477 psi | 56% | 2844 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 43,192 psi | 66% | 2979 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 43,497 psi | 67% | 3012 fps | 95.9% |
| Ramshot TAC | <<locked>> | 80% | 50,241 psi | 77% | 3061 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,038 psi | 77% | 3084 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 54,302 psi | 84% | 3110 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,035 psi | 42% | 1827 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,814 psi | 64% | 2894 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,760 psi | 72% | 3097 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,782 psi | 58% | 2943 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 36,172 psi | 56% | 2858 fps | 95.1% |
| ReloadSwiss RS 70 | 59.3 gr | 86% | 38,392 psi | 59% | 2927 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 51,213 psi | 79% | 3041 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,817 psi | 69% | 2940 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 38,348 psi | 59% | 2848 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 47,036 psi | 72% | 2995 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 40,190 psi | 62% | 2854 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,979 psi | 74% | 3028 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,105 psi | 66% | 2923 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 88% | 43,584 psi | 67% | 2946 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,450 psi | 61% | 2900 fps | 97.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,994 psi | 75% | 3038 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,775 psi | 72% | 3012 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,370 psi | 74% | 2943 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,495 psi | 62% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 45,194 psi | 70% | 2913 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 54,723 psi | 84% | 3143 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 48,080 psi | 74% | 2940 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,501 psi | 75% | 3031 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 39,131 psi | 60% | 2854 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 28,587 psi | 44% | 2661 fps | 95.8% |
| Somchem S385 | <<locked>> | 98% | 48,631 psi | 75% | 3074 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 54,346 psi | 84% | 3005 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,762 psi | 75% | 2933 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,715 psi | 69% | 2920 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,092 psi | 69% | 2927 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,144 psi | 57% | 2779 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 82% | 35,578 psi | 55% | 2785 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 50,676 psi | 78% | 3054 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,555 psi | 67% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 37,565 psi | 58% | 2848 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 90% | 34,360 psi | 53% | 2831 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,924 psi | 51% | 2694 fps | 96.5% |
| Winchester 748 | <<locked>> | 80% | 50,676 psi | 78% | 3104 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 44,498 psi | 68% | 3028 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 94% | 31,807 psi | 49% | 2838 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,427 psi | 71% | 3015 fps | 99.5% |
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 97 powders for 7 mm Rem. SA Ultra Mag. loaded with the .284 | 120gr | Sierra Pro-Hunter. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,346 fps; across all powders the maximum-charge window runs from 1,991 fps to 3,346 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.284" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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 7 mm Rem. SA Ultra Mag. with the .284 | 120gr | Sierra Pro-Hunter 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.