Load Specifications
Bullet Manufacturer:Speer
Bullet Weight:250 gr
Bullet Diameter:0.358"
Bullet Length:<<locked>>
Caliber:.358 STA load data
Case Length (l3):2.847"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:105 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:26"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:6.0
Load data in caliber .358 STA with .358 | 250gr | Speer Grand Slam bullet and 112 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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 56,710 psi | 87% | 2651 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,086 psi | 86% | 2680 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,319 psi | 88% | 2743 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 58,030 psi | 89% | 2749 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,630 psi | 72% | 2671 fps | 98.7% |
| Accurate 4064 | <<locked>> | 88% | 56,086 psi | 86% | 2730 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,376 psi | 87% | 2831 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 50,821 psi | 78% | 2858 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 84% | 55,883 psi | 86% | 2762 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,797 psi | 87% | 2766 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,983 psi | 83% | 2815 fps | 97.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 58,175 psi | 89% | 2759 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,043 psi | 86% | 2677 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,753 psi | 86% | 2887 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 53,853 psi | 83% | 2812 fps | 97.7% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 53,853 psi | 83% | 2812 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,276 psi | 88% | 2785 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 57,653 psi | 89% | 2808 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,014 psi | 88% | 2884 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 58,668 psi | 90% | 2917 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,055 psi | 82% | 2805 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,644 psi | 72% | 2746 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,903 psi | 68% | 2694 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,609 psi | 59% | 2605 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,719 psi | 76% | 2871 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,680 psi | 86% | 2782 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 58,218 psi | 90% | 2805 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,644 psi | 72% | 2746 fps | 96.5% |
| Bofors RP7 | <<locked>> | 94% | 57,638 psi | 89% | 2785 fps | 99% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,999 psi | 86% | 2687 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 57,986 psi | 89% | 2792 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,201 psi | 85% | 2772 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 55,172 psi | 85% | 2831 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 92% | 55,550 psi | 85% | 2792 fps | 98.3% |
| Hodgdon H4895 | <<locked>> | 84% | 56,463 psi | 87% | 2772 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 57,145 psi | 88% | 2805 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,275 psi | 87% | 2805 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,361 psi | 85% | 2867 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,056 psi | 55% | 1680 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 57,493 psi | 88% | 2772 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,855 psi | 87% | 2746 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,449 psi | 87% | 2749 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,985 psi | 86% | 2733 fps | 99.1% |
| IMR 4350 | <<locked>> | 98% | 58,131 psi | 89% | 2812 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,999 psi | 86% | 2762 fps | 99.1% |
| IMR 4831 | <<locked>> | 98% | 56,565 psi | 87% | 2818 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 55,709 psi | 86% | 2789 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 53,751 psi | 83% | 2746 fps | 95.9% |
| IMR 8208 XBR | <<locked>> | 84% | 58,175 psi | 89% | 2759 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,869 psi | 86% | 2733 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 58,378 psi | 90% | 2733 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,318 psi | 87% | 2740 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,724 psi | 86% | 2759 fps | 99.7% |
| Lovex S070 | <<locked>> | 96% | 56,695 psi | 87% | 2795 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,740 psi | 60% | 2530 fps | 97% |
| Norma 201 | <<locked>> | 86% | 58,059 psi | 89% | 2753 fps | 100% |
| Norma 202 | <<locked>> | 86% | 58,769 psi | 90% | 2749 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,826 psi | 87% | 2795 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,230 psi | 85% | 2812 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 49,327 psi | 76% | 2828 fps | 98.4% |
| Norma URP | <<locked>> | 98% | 58,755 psi | 90% | 2867 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 57,711 psi | 89% | 2822 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 57,493 psi | 88% | 2871 fps | 99.8% |
| Ramshot TAC | <<locked>> | 84% | 58,291 psi | 90% | 2789 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 84% | 58,247 psi | 90% | 2802 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 58,740 psi | 90% | 2759 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,535 psi | 56% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,172 psi | 85% | 2753 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 58,697 psi | 90% | 2877 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 58,218 psi | 90% | 2907 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,057 psi | 86% | 2858 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,013 psi | 85% | 2884 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 55,492 psi | 85% | 2680 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 58,595 psi | 90% | 2753 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 58,088 psi | 89% | 2795 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 55,912 psi | 86% | 2789 fps | 96.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,895 psi | 80% | 2785 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 94% | 57,638 psi | 89% | 2785 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,724 psi | 86% | 2759 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,869 psi | 86% | 2733 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,318 psi | 87% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 56,695 psi | 87% | 2795 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,014 psi | 86% | 2808 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,014 psi | 88% | 2769 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 57,682 psi | 89% | 2785 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,724 psi | 86% | 2638 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,217 psi | 86% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,753 psi | 86% | 2713 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,401 psi | 79% | 2782 fps | 97.5% |
| Somchem S335 | <<locked>> | 86% | 58,711 psi | 90% | 2680 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,753 psi | 87% | 2756 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 58,030 psi | 89% | 2789 fps | 100% |
| Somchem S361ᴾ | <<locked>> | 100% | 57,899 psi | 89% | 2782 fps | 96.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 57,217 psi | 88% | 2864 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,721 psi | 81% | 2766 fps | 98.4% |
| Vihtavuori N130 | <<locked>> | 82% | 58,711 psi | 90% | 2638 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 56,072 psi | 86% | 2621 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 58,682 psi | 90% | 2707 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,796 psi | 86% | 2684 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,970 psi | 86% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 57,522 psi | 88% | 2812 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,440 psi | 70% | 2635 fps | 96.6% |
| Vihtavuori N530 | <<locked>> | 84% | 58,639 psi | 90% | 2756 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,406 psi | 88% | 2730 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,565 psi | 87% | 2822 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,892 psi | 75% | 2766 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 57,508 psi | 88% | 2785 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,361 psi | 85% | 2756 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,405 psi | 85% | 2835 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,436 psi | 61% | 2733 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 57,885 psi | 89% | 2792 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,400 psi | 76% | 2703 fps | 96.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 53,185 psi | 82% | 2605 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,137 psi | 71% | 2546 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,737 psi | 83% | 2697 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,672 psi | 69% | 2536 fps | 96.5% |
| Accurate 3100 | <<locked>> | 90% | 33,127 psi | 51% | 2405 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 43,685 psi | 67% | 2549 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,590 psi | 50% | 2405 fps | 96.8% |
| Accurate High Country | <<locked>> | 98% | 47,355 psi | 73% | 2795 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 49,269 psi | 76% | 2664 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 41,872 psi | 64% | 2523 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 44,585 psi | 69% | 2651 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,314 psi | 79% | 2664 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,576 psi | 81% | 2631 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,310 psi | 70% | 2717 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 44,440 psi | 68% | 2651 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 44,440 psi | 68% | 2651 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,930 psi | 65% | 2546 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,889 psi | 69% | 2612 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,503 psi | 50% | 2415 fps | 96.9% |
| Alliant Reloder-17 | 70.9 gr | 80% | 36,390 psi | 56% | 2539 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 43,874 psi | 67% | 2644 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,714 psi | 67% | 2690 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,716 psi | 41% | 2283 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,185 psi | 53% | 2497 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 86% | 30,385 psi | 47% | 2444 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,646 psi | 75% | 2674 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 41,829 psi | 64% | 2556 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 43,714 psi | 67% | 2690 fps | 95.7% |
| Bofors RP7 | <<locked>> | 82% | 39,784 psi | 61% | 2477 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,866 psi | 81% | 2644 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,720 psi | 78% | 2690 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,496 psi | 65% | 2562 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 37,115 psi | 57% | 2507 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 84% | 42,975 psi | 66% | 2579 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 49,777 psi | 77% | 2674 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,023 psi | 46% | 2320 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,021 psi | 71% | 2654 fps | 100% |
| Hodgdon Superformance | 78.7 gr | 84% | 38,899 psi | 60% | 2569 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 41% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,688 psi | 73% | 2625 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,966 psi | 77% | 2654 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,019 psi | 68% | 2552 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,253 psi | 71% | 2575 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 40,161 psi | 62% | 2510 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,798 psi | 60% | 2457 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 31,517 psi | 48% | 2362 fps | 96.4% |
| IMR 4895 | <<locked>> | 80% | 46,006 psi | 71% | 2638 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 98% | 50,459 psi | 78% | 2694 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 51,314 psi | 79% | 2664 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,907 psi | 75% | 2638 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,617 psi | 75% | 2592 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,005 psi | 68% | 2552 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,289 psi | 56% | 2411 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 36,724 psi | 56% | 2441 fps | 95.4% |
| Lovex S071 | <<locked>> | 96% | 34,084 psi | 52% | 2428 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 48,182 psi | 74% | 2612 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,689 psi | 75% | 2612 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,237 psi | 68% | 2598 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 45,223 psi | 70% | 2648 fps | 95.6% |
| Norma MRP | <<locked>> | 92% | 37,623 psi | 58% | 2592 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 32,677 psi | 50% | 2402 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 80% | 44,063 psi | 68% | 2615 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 33,968 psi | 52% | 2441 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 51,242 psi | 79% | 2684 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,024 psi | 78% | 2697 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 55,114 psi | 85% | 2710 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,267 psi | 42% | 1532 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,656 psi | 66% | 2546 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,892 psi | 74% | 2717 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,696 psi | 60% | 2595 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,184 psi | 50% | 2418 fps | 96.2% |
| ReloadSwiss RS 70 | 72 gr | 80% | 31,981 psi | 49% | 2421 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 52,301 psi | 80% | 2638 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,977 psi | 71% | 2569 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,320 psi | 60% | 2500 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 49,298 psi | 76% | 2684 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 94% | 42,612 psi | 66% | 2625 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 82% | 39,784 psi | 61% | 2477 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,289 psi | 56% | 2411 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,907 psi | 75% | 2638 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,005 psi | 68% | 2552 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,724 psi | 56% | 2441 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,379 psi | 62% | 2552 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,821 psi | 77% | 2661 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,688 psi | 73% | 2638 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,269 psi | 76% | 2549 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,365 psi | 64% | 2428 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,869 psi | 58% | 2408 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,279 psi | 65% | 2621 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 48,950 psi | 75% | 2552 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,487 psi | 76% | 2651 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 39,958 psi | 61% | 2503 fps | 99.6% |
| Somchem S361 | <<locked>> | 98% | 54,172 psi | 83% | 2730 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 29,385 psi | 45% | 2362 fps | 98.7% |
| Somchem S385 | <<locked>> | 92% | 40,698 psi | 63% | 2559 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 55,376 psi | 85% | 2595 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 49,705 psi | 76% | 2536 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,774 psi | 70% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,064 psi | 71% | 2546 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,029 psi | 59% | 2438 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 34,127 psi | 53% | 2405 fps | 97.1% |
| Vihtavuori N165 | <<locked>> | 96% | 39,929 psi | 61% | 2530 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 51,532 psi | 79% | 2657 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,556 psi | 69% | 2546 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,678 psi | 52% | 2408 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 82% | 27,093 psi | 42% | 2303 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,547 psi | 52% | 2379 fps | 98.8% |
| Winchester 748 | <<locked>> | 80% | 51,692 psi | 80% | 2707 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 37,275 psi | 57% | 2507 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,121 psi | 39% | 2303 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,485 psi | 73% | 2641 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 43,178 psi | 66% | 2595 fps | 95.2% |
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 112 powders for .358 STA loaded with the .358 | 250gr | Speer Grand Slam. Alliant Reloder-17 delivers the highest muzzle velocity at 2,917 fps; across all powders the maximum-charge window runs from 1,680 fps to 2,917 fps. Accurate 3100 gives the best case fill at 100 %, and 112 of the 112 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 250.0 gr projectile in 0.358" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2209 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 .358 STA with the .358 | 250gr | Speer Grand Slam 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.