Load Specifications
Load data in caliber .358 Norma Mag. with .358 | 220gr | Atomic 29 HP bullet and 95 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 52 and Hodgdon LEVERevolution.
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>> | 92% | 56,739 psi | 89% | 2723 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 57,537 psi | 90% | 2825 fps | 99% |
| Accurate 2230 | <<locked>> | 82% | 54,737 psi | 86% | 2782 fps | 98.9% |
| Accurate 2460 | <<locked>> | 88% | 55,390 psi | 87% | 2753 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 56,898 psi | 89% | 2779 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 56,985 psi | 89% | 2808 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 56,521 psi | 89% | 2818 fps | 100% |
| Accurate LT-30 | <<locked>> | 86% | 57,377 psi | 90% | 2680 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 54,491 psi | 85% | 2657 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 55,883 psi | 88% | 2812 fps | 99.3% |
| ADI AR 2207 | <<locked>> | 82% | 55,259 psi | 87% | 2651 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 2805 fps | 99% |
| ADI AR 2219 | <<locked>> | 84% | 54,288 psi | 85% | 2753 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 55,332 psi | 87% | 2769 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 92% | 54,679 psi | 86% | 2753 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 56,811 psi | 89% | 2874 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 55,622 psi | 87% | 2917 fps | 98.9% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 55,869 psi | 88% | 2822 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 88% | 56,985 psi | 89% | 2736 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 56,826 psi | 89% | 2844 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,018 psi | 67% | 2667 fps | 96% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 49,472 psi | 78% | 2822 fps | 99% |
| Alliant Reloder-7 | <<locked>> | 82% | 56,260 psi | 88% | 2671 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 56,478 psi | 89% | 2677 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 55,840 psi | 88% | 2825 fps | 98.6% |
| Bofors RP3ᴾ | <<locked>> | 100% | 56,217 psi | 88% | 2838 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 92% | 57,653 psi | 90% | 2759 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 53,911 psi | 84% | 2795 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 90% | 56,014 psi | 88% | 2890 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 88% | 56,362 psi | 88% | 2779 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 57,421 psi | 90% | 2802 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 54,360 psi | 85% | 2795 fps | 97.8% |
| Hodgdon H4198 | <<locked>> | 82% | 55,912 psi | 88% | 2680 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 56,333 psi | 88% | 2822 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,001 psi | 61% | 2552 fps | 96.6% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 54,969 psi | 86% | 2851 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,127 psi | 53% | 1654 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 54,592 psi | 86% | 2776 fps | 99.5% |
| IMR 3031 | <<locked>> | 94% | 55,376 psi | 87% | 2812 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 56,391 psi | 88% | 2789 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 96% | 57,682 psi | 90% | 2769 fps | 96.1% |
| IMR 4198 | <<locked>> | 88% | 57,551 psi | 90% | 2700 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 54,621 psi | 86% | 2825 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 92% | 55,332 psi | 87% | 2769 fps | 99.8% |
| Lovex D073.4 | <<locked>> | 82% | 55,245 psi | 87% | 2759 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 55,390 psi | 87% | 2759 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 54,650 psi | 86% | 2789 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 56,347 psi | 88% | 2743 fps | 99.3% |
| Lovex S062 | <<locked>> | 98% | 55,564 psi | 87% | 2785 fps | 99.9% |
| Norma 200 | <<locked>> | 84% | 56,724 psi | 89% | 2710 fps | 100% |
| Norma 201 | <<locked>> | 94% | 54,447 psi | 85% | 2759 fps | 99.8% |
| Norma 202 | <<locked>> | 94% | 54,984 psi | 86% | 2769 fps | 100% |
| Norma 203B | <<locked>> | 98% | 55,898 psi | 88% | 2831 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 98% | 56,681 psi | 89% | 2861 fps | 99.3% |
| Ramshot TAC | <<locked>> | 92% | 56,333 psi | 88% | 2785 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 92% | 55,042 psi | 86% | 2802 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 90% | 57,145 psi | 90% | 2776 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,418 psi | 54% | 1696 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 55,172 psi | 86% | 2762 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 55,376 psi | 87% | 2779 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 56,869 psi | 89% | 2913 fps | 99.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 52,953 psi | 83% | 2890 fps | 100% |
| Rottweil R 901 | <<locked>> | 92% | 55,245 psi | 87% | 2746 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 54,636 psi | 86% | 2753 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2769 fps | 99.3% |
| Shooters World AR Plus | <<locked>> | 82% | 55,245 psi | 87% | 2759 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 94% | 54,650 psi | 86% | 2789 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 55,564 psi | 87% | 2785 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 55,579 psi | 87% | 2733 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 57,508 psi | 90% | 2434 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 54,621 psi | 86% | 2759 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 54,447 psi | 85% | 2835 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 54,694 psi | 86% | 2713 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 53,911 psi | 84% | 2756 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 54,462 psi | 85% | 2785 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 57,261 psi | 90% | 2713 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 56,463 psi | 88% | 2703 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 56,782 psi | 89% | 2808 fps | 99.9% |
| Somchem S335 | <<locked>> | 94% | 55,782 psi | 87% | 2710 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 57,159 psi | 90% | 2805 fps | 99.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 52,953 psi | 83% | 2772 fps | 99.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,840 psi | 59% | 2598 fps | 97.9% |
| Vihtavuori N120 | <<locked>> | 82% | 55,143 psi | 86% | 2602 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 56,855 psi | 89% | 2684 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 57,043 psi | 89% | 2700 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 57,203 psi | 90% | 2772 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 55,463 psi | 87% | 2746 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 51,082 psi | 80% | 2710 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 45,150 psi | 71% | 2661 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 92% | 56,028 psi | 88% | 2772 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 98% | 57,203 psi | 90% | 2789 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 44,019 psi | 69% | 2661 fps | 95.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,644 psi | 73% | 2654 fps | 98.5% |
| Winchester 748 | <<locked>> | 92% | 54,955 psi | 86% | 2818 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 53,969 psi | 85% | 2792 fps | 99.5% |
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% | 38,856 psi | 61% | 2454 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,430 psi | 79% | 2713 fps | 98% |
| Accurate 2230 | <<locked>> | 80% | 50,952 psi | 80% | 2723 fps | 98.4% |
| Accurate 2460 | <<locked>> | 80% | 42,061 psi | 66% | 2546 fps | 99.6% |
| Accurate 2495 | <<locked>> | 80% | 30,850 psi | 48% | 2346 fps | 99.7% |
| Accurate 2520 | <<locked>> | 80% | 37,449 psi | 59% | 2493 fps | 98.8% |
| Accurate 4064 | <<locked>> | 80% | 29,240 psi | 46% | 2326 fps | 97.6% |
| Accurate LT-30 | <<locked>> | 80% | 47,776 psi | 75% | 2546 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,153 psi | 75% | 2566 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 35,650 psi | 56% | 2444 fps | 95.2% |
| ADI AR 2207 | <<locked>> | 80% | 51,953 psi | 81% | 2612 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 39,204 psi | 61% | 2503 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 47,282 psi | 74% | 2648 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,710 psi | 59% | 2467 fps | 97.2% |
| Alliant AR-Comp | <<locked>> | 80% | 36,332 psi | 57% | 2477 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,453 psi | 68% | 2654 fps | 98.1% |
| Alliant Power Pro 2000-MR | 64 gr | 86% | 39,595 psi | 62% | 2618 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 33,330 psi | 52% | 2418 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,353 psi | 70% | 2556 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 38,580 psi | 60% | 2530 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 98% | 40,379 psi | 63% | 2608 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 90% | 35,375 psi | 55% | 2530 fps | 95.2% |
| Alliant Reloder-7 | <<locked>> | 80% | 52,765 psi | 83% | 2625 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,514 psi | 73% | 2539 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 39,755 psi | 62% | 2549 fps | 95.2% |
| Bofors RP3 | <<locked>> | 84% | 32,460 psi | 51% | 2411 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,001 psi | 63% | 2470 fps | 98.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,578 psi | 56% | 2474 fps | 97.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 39,320 psi | 62% | 2598 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 43,178 psi | 68% | 2579 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 43,816 psi | 69% | 2598 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 92% | 44,396 psi | 70% | 2631 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 52,649 psi | 83% | 2635 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 35,897 psi | 56% | 2457 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 36,724 psi | 58% | 2503 fps | 95.9% |
| Hodgdon LEVERevolution | 59.8 gr | 82% | 34,272 psi | 54% | 2470 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,237 psi | 40% | 1476 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,824 psi | 55% | 2418 fps | 95.5% |
| IMR 3031 | <<locked>> | 80% | 34,722 psi | 54% | 2470 fps | 99.7% |
| IMR 4064 | <<locked>> | 86% | 38,711 psi | 61% | 2487 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 94% | 54,143 psi | 85% | 2717 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 45,411 psi | 71% | 2530 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 36,956 psi | 58% | 2507 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 37,710 psi | 59% | 2467 fps | 97.2% |
| Lovex D073.4 | <<locked>> | 80% | 51,648 psi | 81% | 2710 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 41,901 psi | 66% | 2546 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 80% | 33,591 psi | 53% | 2421 fps | 97.8% |
| Lovex S060 | <<locked>> | 80% | 36,724 psi | 58% | 2402 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 31,328 psi | 49% | 2336 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 49,835 psi | 78% | 2618 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,838 psi | 55% | 2405 fps | 96.5% |
| Norma 202 | <<locked>> | 80% | 34,882 psi | 55% | 2425 fps | 98.7% |
| Norma 203B | <<locked>> | 84% | 35,447 psi | 56% | 2464 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 86% | 37,724 psi | 59% | 2533 fps | 95.6% |
| Ramshot TAC | <<locked>> | 86% | 46,006 psi | 72% | 2618 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,680 psi | 57% | 2477 fps | 95.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,046 psi | 64% | 2513 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,425 psi | 40% | 1512 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,467 psi | 67% | 2556 fps | 99.3% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 51,735 psi | 81% | 2723 fps | 95.6% |
| ReloadSwiss RS 52 | 60.6 gr | 84% | 37,507 psi | 59% | 2572 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 30,980 psi | 49% | 2425 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 38,479 psi | 60% | 2464 fps | 99.1% |
| Rottweil R 902 | <<locked>> | 80% | 33,069 psi | 52% | 2356 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 86% | 32,532 psi | 51% | 2405 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 51,648 psi | 81% | 2710 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,591 psi | 53% | 2421 fps | 97.8% |
| Shooters World Precision | <<locked>> | 80% | 31,328 psi | 49% | 2336 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,034 psi | 71% | 2572 fps | 98.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,793 psi | 81% | 2365 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,659 psi | 75% | 2657 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 36,550 psi | 57% | 2513 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,136 psi | 71% | 2575 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 43,642 psi | 68% | 2589 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 36,709 psi | 58% | 2467 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,782 psi | 58% | 2388 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,965 psi | 47% | 2251 fps | 98.3% |
| Somchem S321 | <<locked>> | 80% | 40,335 psi | 63% | 2543 fps | 98.2% |
| Somchem S335 | <<locked>> | 80% | 36,114 psi | 57% | 2388 fps | 99.4% |
| Somchem S341 | <<locked>> | 82% | 37,782 psi | 59% | 2480 fps | 95.8% |
| Somchem S355 | <<locked>> | 86% | 33,779 psi | 53% | 2418 fps | 95.1% |
| Somchem S365 | <<locked>> | 94% | 31,285 psi | 49% | 2438 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 51,895 psi | 81% | 2562 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 41,887 psi | 66% | 2470 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,883 psi | 58% | 2395 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 31,908 psi | 50% | 2359 fps | 99.7% |
| Vihtavuori N140 | <<locked>> | 80% | 32,953 psi | 52% | 2362 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 84% | 30,139 psi | 47% | 2310 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 98% | 42,308 psi | 66% | 2608 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 37,681 psi | 59% | 2464 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 80% | 31,734 psi | 50% | 2349 fps | 97.7% |
| Vihtavuori N550 | <<locked>> | 98% | 41,234 psi | 65% | 2608 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 35,665 psi | 56% | 2438 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 36,448 psi | 57% | 2497 fps | 97.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,402 psi | 52% | 2415 fps | 95.1% |
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 95 powders for .358 Norma Mag. loaded with the .358 | 220gr | Atomic 29 HP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,917 fps; across all powders the maximum-charge window runs from 1,654 fps to 2,917 fps. Accurate 4064 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.358" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, ADI AR 2208, Alliant Reloder- TS 15.5 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 52, Hodgdon LEVERevolution rank at the top here: for .358 Norma Mag. with the .358 | 220gr | Atomic 29 HP 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.