Load Specifications
Load data in caliber 7 mm Rem. SA Ultra Mag. with .284 | 127gr | Hasler Hunting bullet and 99 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, 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.
A valid access license is required to use the Personalized Load Calculator.
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% | 56,159 psi | 86% | 2979 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 58,102 psi | 89% | 3054 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 58,450 psi | 90% | 3045 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 56,855 psi | 87% | 3071 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 58,204 psi | 90% | 3061 fps | 97.4% |
| Accurate 4064 | <<locked>> | 92% | 58,581 psi | 90% | 3100 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,347 psi | 85% | 3136 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 86% | 55,535 psi | 85% | 3087 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 56,768 psi | 87% | 3087 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 58,073 psi | 89% | 3091 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,303 psi | 85% | 3005 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,405 psi | 85% | 3212 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,768 psi | 87% | 3107 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,348 psi | 88% | 3133 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,507 psi | 87% | 3199 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 96% | 58,189 psi | 90% | 3241 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,335 psi | 62% | 2907 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,455 psi | 70% | 3084 fps | 98.2% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,463 psi | 85% | 3100 fps | 99.6% |
| Bofors RP3 | <<locked>> | 92% | 57,479 psi | 88% | 3123 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 57,319 psi | 88% | 3094 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,043 psi | 86% | 3015 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 57,841 psi | 89% | 3120 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,956 psi | 86% | 3169 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 58,653 psi | 90% | 3077 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 58,508 psi | 90% | 3140 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 98% | 58,668 psi | 90% | 3199 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 96% | 58,798 psi | 90% | 3156 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 86% | 56,101 psi | 86% | 3097 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,011 psi | 82% | 3068 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,028 psi | 86% | 3133 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,477 psi | 85% | 3176 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,447 psi | 55% | 1906 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 57,406 psi | 88% | 3100 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 56,043 psi | 86% | 3077 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,101 psi | 86% | 3068 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,985 psi | 86% | 3048 fps | 97.8% |
| IMR 4350ᴾ | <<locked>> | 100% | 58,059 psi | 89% | 3123 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,869 psi | 86% | 3071 fps | 97.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,898 psi | 86% | 3127 fps | 99.7% |
| IMR 4895 | <<locked>> | 88% | 55,143 psi | 85% | 3107 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 58,073 psi | 89% | 3091 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 58,363 psi | 90% | 3071 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,405 psi | 85% | 3058 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 58,566 psi | 90% | 3068 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 55,753 psi | 86% | 3061 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 58,682 psi | 90% | 3117 fps | 99.2% |
| Lovex S070 | <<locked>> | 98% | 56,333 psi | 87% | 3100 fps | 98.1% |
| Norma 201 | <<locked>> | 88% | 57,450 psi | 88% | 3077 fps | 100% |
| Norma 202 | <<locked>> | 88% | 58,262 psi | 90% | 3077 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,521 psi | 87% | 3117 fps | 100% |
| Norma 204 | <<locked>> | 98% | 55,100 psi | 85% | 3114 fps | 95.9% |
| Norma URPᴾ | <<locked>> | 100% | 58,276 psi | 90% | 3186 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 90% | 57,406 psi | 88% | 3146 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 57,145 psi | 88% | 3179 fps | 98.8% |
| Ramshot TAC | <<locked>> | 86% | 58,436 psi | 90% | 3110 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 58,189 psi | 90% | 3130 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,245 psi | 85% | 3031 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,897 psi | 55% | 1952 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,217 psi | 88% | 3064 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 58,755 psi | 90% | 3120 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 58,175 psi | 89% | 3205 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 58,059 psi | 89% | 3245 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,201 psi | 85% | 3159 fps | 99.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 58,769 psi | 90% | 3258 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 86% | 58,175 psi | 89% | 3058 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 58,218 psi | 90% | 3081 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,334 psi | 88% | 3114 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 57,319 psi | 88% | 3094 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 98% | 58,682 psi | 90% | 3117 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,405 psi | 85% | 3058 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,753 psi | 86% | 3061 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,333 psi | 87% | 3100 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,651 psi | 86% | 3123 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 57,101 psi | 88% | 3087 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 57,609 psi | 89% | 3110 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,680 psi | 86% | 2966 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,101 psi | 86% | 2963 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,477 psi | 85% | 3012 fps | 97.7% |
| Somchem S321 | <<locked>> | 82% | 55,608 psi | 86% | 3064 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 58,320 psi | 90% | 3005 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,565 psi | 87% | 3074 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 57,580 psi | 89% | 3114 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,576 psi | 81% | 3130 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 58,595 psi | 90% | 2972 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,028 psi | 86% | 2949 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 57,856 psi | 89% | 3035 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,347 psi | 85% | 3005 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,579 psi | 86% | 3035 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 57,043 psi | 88% | 3123 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 86% | 58,537 psi | 90% | 3087 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 57,217 psi | 88% | 3054 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,057 psi | 86% | 3127 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,396 psi | 68% | 2989 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 57,551 psi | 89% | 3100 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,911 psi | 84% | 3081 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 58,668 psi | 90% | 3199 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,129 psi | 56% | 2907 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 57,827 psi | 89% | 3120 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% | 49,516 psi | 76% | 2881 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 54,476 psi | 84% | 3002 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,727 psi | 64% | 2785 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,516 psi | 76% | 2959 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 47,529 psi | 73% | 2877 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 39,494 psi | 61% | 2779 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 36,056 psi | 55% | 2762 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 45,774 psi | 70% | 2913 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 80% | 38,928 psi | 60% | 2749 fps | 97.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,935 psi | 74% | 2923 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 48,399 psi | 74% | 2907 fps | 100% |
| Alliant Power Pro 2000-MR | 51.3 gr | 80% | 41,771 psi | 64% | 2943 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,508 psi | 59% | 2769 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,423 psi | 64% | 2841 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 86% | 36,085 psi | 56% | 2779 fps | 95.8% |
| Alliant Reloder-17 | 50.5 gr | 80% | 33,199 psi | 51% | 2726 fps | 96.6% |
| Alliant Reloder-23 | <<locked>> | 92% | 31,198 psi | 48% | 2667 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 94% | 36,419 psi | 56% | 2864 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,107 psi | 69% | 2913 fps | 98.3% |
| Bofors RP3 | <<locked>> | 80% | 38,116 psi | 59% | 2769 fps | 98.5% |
| Bofors RP7 | <<locked>> | 90% | 47,456 psi | 73% | 2917 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,429 psi | 76% | 2910 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,862 psi | 72% | 2940 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,098 psi | 80% | 3104 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 80% | 54,911 psi | 84% | 3025 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,928 psi | 60% | 2772 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 90% | 44,556 psi | 69% | 2946 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 92% | 51,735 psi | 80% | 3035 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 46,253 psi | 71% | 2927 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,966 psi | 48% | 2605 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,293 psi | 65% | 2890 fps | 99.3% |
| Hodgdon Superformance | 61.4 gr | 92% | 47,776 psi | 74% | 3031 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,237 psi | 40% | 1703 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,324 psi | 68% | 2871 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 45,847 psi | 71% | 2917 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,872 psi | 63% | 2789 fps | 97.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 46,311 psi | 71% | 2871 fps | 95.7% |
| IMR 4350 | <<locked>> | 94% | 47,906 psi | 74% | 2946 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,456 psi | 71% | 2900 fps | 95.7% |
| IMR 4831 | <<locked>> | 86% | 34,809 psi | 54% | 2713 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 42,467 psi | 65% | 2874 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 47,935 psi | 74% | 2923 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 54,404 psi | 84% | 3015 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,846 psi | 69% | 2884 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,730 psi | 70% | 2848 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 40,698 psi | 63% | 2792 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 40,379 psi | 62% | 2779 fps | 95.6% |
| Lovex S070 | <<locked>> | 90% | 43,511 psi | 67% | 2867 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 44,541 psi | 69% | 2858 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 45,136 psi | 69% | 2871 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,770 psi | 63% | 2828 fps | 98.3% |
| Norma 204 | <<locked>> | 96% | 51,488 psi | 79% | 3051 fps | 95% |
| Norma URP | <<locked>> | 86% | 36,347 psi | 56% | 2766 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 40,480 psi | 62% | 2841 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 40,785 psi | 63% | 2871 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 47,790 psi | 74% | 2927 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,572 psi | 73% | 2949 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,663 psi | 79% | 2972 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,527 psi | 41% | 1742 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,650 psi | 83% | 3009 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,279 psi | 65% | 2822 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,772 psi | 67% | 2949 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,389 psi | 54% | 2802 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 36,013 psi | 55% | 2782 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 38,479 psi | 59% | 2851 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 48,530 psi | 75% | 2904 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,293 psi | 65% | 2805 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 35,665 psi | 55% | 2707 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 47,456 psi | 73% | 2917 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 40,379 psi | 62% | 2779 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,846 psi | 69% | 2884 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,698 psi | 63% | 2792 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 90% | 43,511 psi | 67% | 2867 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,869 psi | 57% | 2762 fps | 97.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,209 psi | 71% | 2900 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,164 psi | 68% | 2877 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,122 psi | 71% | 2815 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,421 psi | 59% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,455 psi | 70% | 2835 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 51,895 psi | 80% | 3005 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,527 psi | 70% | 2808 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,876 psi | 71% | 2894 fps | 99.1% |
| Somchem S355 | <<locked>> | 80% | 36,550 psi | 56% | 2717 fps | 97.7% |
| Somchem S365 | <<locked>> | 82% | 28,311 psi | 44% | 2585 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 52,069 psi | 80% | 2881 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,557 psi | 72% | 2808 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,148 psi | 65% | 2792 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,583 psi | 66% | 2799 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,751 psi | 53% | 2648 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 84% | 35,563 psi | 55% | 2710 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 48,051 psi | 74% | 2920 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 41,118 psi | 63% | 2782 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 37,420 psi | 58% | 2766 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 92% | 33,736 psi | 52% | 2746 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,864 psi | 47% | 2566 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 47,892 psi | 74% | 2966 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 44,773 psi | 69% | 2949 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 96% | 31,546 psi | 49% | 2759 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,874 psi | 67% | 2881 fps | 99.3% |
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 99 powders for 7 mm Rem. SA Ultra Mag. loaded with the .284 | 127gr | Hasler Hunting. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,258 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,258 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 99 of the 99 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 127.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, 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. Alliant Power Pro 2000-MR, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for 7 mm Rem. SA Ultra Mag. with the .284 | 127gr | Hasler Hunting 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.