Load Specifications
Bullet:.284 | 140gr | Frontier BTSP
Bullet Manufacturer:Frontier Bullets
Bullet Weight:140 gr
Bullet Diameter:0.284"
Bullet Length:<<locked>>
Case Length (l3):2.026"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:72.6 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:9.0
Load data in caliber 7 mm Rem. SA Ultra Mag. with .284 | 140gr | Frontier BTSP bullet and 101 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.
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>> | 82% | 55,724 psi | 86% | 2818 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 58,610 psi | 90% | 2890 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 56,260 psi | 87% | 2910 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 57,290 psi | 88% | 2907 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,774 psi | 70% | 2812 fps | 97.6% |
| Accurate 4064 | <<locked>> | 88% | 55,114 psi | 85% | 2897 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,419 psi | 85% | 2992 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 58,494 psi | 90% | 2979 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,086 psi | 86% | 2930 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,330 psi | 82% | 2966 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 57,188 psi | 88% | 2923 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 58,595 psi | 90% | 2890 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,723 psi | 84% | 3051 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,492 psi | 87% | 2953 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,695 psi | 87% | 2972 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,333 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 57,783 psi | 89% | 3084 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,272 psi | 80% | 2953 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,163 psi | 66% | 2835 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,805 psi | 75% | 3015 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 58,639 psi | 90% | 2999 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 57,290 psi | 88% | 2969 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,826 psi | 87% | 2943 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 58,740 psi | 90% | 2904 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 57,058 psi | 88% | 2959 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 57,870 psi | 89% | 2982 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 96% | 57,914 psi | 89% | 3041 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 94% | 58,160 psi | 89% | 3002 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 84% | 55,463 psi | 85% | 2936 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,246 psi | 87% | 2969 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,288 psi | 85% | 2972 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 58,682 psi | 90% | 3084 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 55% | 1804 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,594 psi | 87% | 2936 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,869 psi | 86% | 2917 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,361 psi | 85% | 2907 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 58,552 psi | 90% | 2943 fps | 98.8% |
| IMR 4350 | <<locked>> | 98% | 57,319 psi | 88% | 2969 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 94% | 58,769 psi | 90% | 2976 fps | 98.8% |
| IMR 4831 | <<locked>> | 98% | 55,869 psi | 86% | 2982 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 58,175 psi | 89% | 3002 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 57,188 psi | 88% | 2923 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 58,798 psi | 90% | 2953 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 57,450 psi | 88% | 2900 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,593 psi | 86% | 2910 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 58,421 psi | 90% | 2969 fps | 99.5% |
| Lovex S070 | <<locked>> | 96% | 56,014 psi | 86% | 2953 fps | 98.7% |
| Norma 201 | <<locked>> | 86% | 57,145 psi | 88% | 2920 fps | 100% |
| Norma 202 | <<locked>> | 86% | 57,827 psi | 89% | 2920 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,898 psi | 86% | 2959 fps | 100% |
| Norma 204 | <<locked>> | 98% | 58,392 psi | 90% | 3028 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 48,486 psi | 75% | 2969 fps | 97.2% |
| Norma URP | <<locked>> | 98% | 57,711 psi | 89% | 3028 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 56,927 psi | 88% | 2989 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 56,666 psi | 87% | 3031 fps | 99.3% |
| Ramshot TAC | <<locked>> | 84% | 57,464 psi | 88% | 2949 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 57,537 psi | 89% | 2969 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 58,088 psi | 89% | 2927 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,448 psi | 56% | 1850 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 58,102 psi | 89% | 2966 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 57,609 psi | 89% | 3045 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 57,450 psi | 88% | 3081 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,969 psi | 85% | 3012 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 57,943 psi | 89% | 3100 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 84% | 58,015 psi | 89% | 2900 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,638 psi | 89% | 2920 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 57,159 psi | 88% | 2963 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,981 psi | 78% | 2933 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 94% | 56,826 psi | 87% | 2943 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 96% | 58,421 psi | 90% | 2969 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 58,798 psi | 90% | 2953 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,593 psi | 86% | 2910 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 56,014 psi | 86% | 2953 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,143 psi | 85% | 2969 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,318 psi | 87% | 2930 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,855 psi | 87% | 2949 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 58,450 psi | 90% | 2854 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,477 psi | 85% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 58,610 psi | 90% | 2920 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,502 psi | 78% | 2927 fps | 96.2% |
| Somchem S321 | <<locked>> | 82% | 58,755 psi | 90% | 2959 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 57,798 psi | 89% | 2848 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,695 psi | 86% | 2917 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 57,159 psi | 88% | 2956 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,318 psi | 87% | 3031 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,866 psi | 80% | 2913 fps | 97.4% |
| Vihtavuori N130 | <<locked>> | 82% | 57,943 psi | 89% | 2808 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 58,755 psi | 90% | 2835 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 57,769 psi | 89% | 2877 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 58,407 psi | 90% | 2897 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 58,668 psi | 90% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,724 psi | 87% | 2972 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 57,957 psi | 89% | 2927 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,637 psi | 87% | 2897 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,680 psi | 86% | 2976 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,124 psi | 74% | 2920 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,695 psi | 87% | 2943 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 58,218 psi | 90% | 2976 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 58,189 psi | 90% | 3048 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,856 psi | 60% | 2864 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,971 psi | 88% | 2959 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% | 52,431 psi | 81% | 2772 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,281 psi | 70% | 2700 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,663 psi | 81% | 2858 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,918 psi | 68% | 2677 fps | 95.1% |
| Accurate 3100 | <<locked>> | 94% | 37,188 psi | 57% | 2638 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 42,844 psi | 66% | 2700 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,807 psi | 49% | 2526 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 48,399 psi | 74% | 2818 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 41,263 psi | 63% | 2667 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 98% | 49,835 psi | 77% | 2904 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,473 psi | 78% | 2822 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,517 psi | 79% | 2799 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,411 psi | 68% | 2864 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,249 psi | 63% | 2694 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,019 psi | 68% | 2756 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,908 psi | 49% | 2536 fps | 95.1% |
| Alliant Reloder-17 | 48.6 gr | 80% | 35,708 psi | 55% | 2671 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,921 psi | 75% | 2894 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,646 psi | 46% | 2503 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,214 psi | 53% | 2684 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,790 psi | 74% | 2825 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 41,017 psi | 63% | 2697 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 44,440 psi | 68% | 2726 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,982 psi | 80% | 2805 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,777 psi | 77% | 2848 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,640 psi | 64% | 2700 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 41,611 psi | 64% | 2753 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 88% | 48,080 psi | 74% | 2831 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 48,863 psi | 75% | 2828 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,399 psi | 45% | 2438 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,223 psi | 70% | 2805 fps | 99.9% |
| Hodgdon Superformance | 56.5 gr | 88% | 44,048 psi | 68% | 2828 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,731 psi | 41% | 1614 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,949 psi | 72% | 2782 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 49,153 psi | 76% | 2818 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,366 psi | 67% | 2703 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,716 psi | 70% | 2726 fps | 96.5% |
| IMR 4350 | <<locked>> | 90% | 44,672 psi | 69% | 2753 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,062 psi | 66% | 2700 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 33,112 psi | 51% | 2543 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 45,107 psi | 69% | 2785 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 50,473 psi | 78% | 2822 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,022 psi | 74% | 2795 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,095 psi | 74% | 2753 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 43,439 psi | 67% | 2707 fps | 99.9% |
| Lovex S065 | <<locked>> | 82% | 37,869 psi | 58% | 2595 fps | 95.8% |
| Lovex S070 | <<locked>> | 86% | 40,843 psi | 63% | 2677 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 47,384 psi | 73% | 2769 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,964 psi | 74% | 2772 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,424 psi | 67% | 2743 fps | 99.3% |
| Norma 204 | <<locked>> | 92% | 47,630 psi | 73% | 2848 fps | 95% |
| Norma MRP | <<locked>> | 96% | 42,293 psi | 65% | 2841 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 32,053 psi | 49% | 2526 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 43,149 psi | 66% | 2759 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 38,043 psi | 59% | 2680 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 50,372 psi | 77% | 2835 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,314 psi | 77% | 2858 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 54,302 psi | 84% | 2871 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,122 psi | 42% | 1654 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,989 psi | 65% | 2684 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,862 psi | 72% | 2867 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,000 psi | 58% | 2733 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,707 psi | 52% | 2595 fps | 95.4% |
| ReloadSwiss RS 70 | 51.8 gr | 84% | 35,911 psi | 55% | 2664 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 51,503 psi | 79% | 2802 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,266 psi | 70% | 2723 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,580 psi | 59% | 2638 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 47,819 psi | 74% | 2877 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 86% | 44,440 psi | 68% | 2726 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,869 psi | 58% | 2595 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,022 psi | 74% | 2795 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,439 psi | 67% | 2707 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 40,843 psi | 63% | 2677 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,566 psi | 61% | 2690 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,066 psi | 75% | 2812 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,847 psi | 72% | 2785 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,544 psi | 75% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,654 psi | 63% | 2575 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,438 psi | 65% | 2648 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,355 psi | 73% | 2871 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 54,824 psi | 84% | 2904 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 48,211 psi | 74% | 2710 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,617 psi | 75% | 2805 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 39,233 psi | 60% | 2644 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 28,848 psi | 44% | 2480 fps | 97.3% |
| Somchem S385 | <<locked>> | 94% | 42,598 psi | 66% | 2746 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 54,549 psi | 84% | 2762 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,965 psi | 75% | 2700 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,947 psi | 69% | 2694 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,324 psi | 70% | 2703 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,391 psi | 58% | 2579 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 33,402 psi | 51% | 2530 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 50,705 psi | 78% | 2818 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,700 psi | 67% | 2694 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,924 psi | 51% | 2530 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 86% | 30,182 psi | 46% | 2523 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,982 psi | 51% | 2503 fps | 97.7% |
| Winchester 748 | <<locked>> | 80% | 50,981 psi | 78% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,611 psi | 64% | 2753 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,036 psi | 43% | 2526 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,543 psi | 72% | 2792 fps | 99.9% |
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 101 powders for 7 mm Rem. SA Ultra Mag. loaded with the .284 | 140gr | Frontier BTSP. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,100 fps; across all powders the maximum-charge window runs from 1,804 fps to 3,100 fps. Accurate 3100 gives the best case fill at 100 %, and 101 of the 101 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 140.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 | 140gr | Frontier BTSP 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.