Load Specifications
Bullet:.375 | 250gr | Hornady CX
Bullet Manufacturer:Hornady
Bullet Weight:250 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:.375 Swiss P load data
Case Length (l3):2.75"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:125 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:25.6"
Max. allowed Pressure:60,916 psi
Recommended Twist Rate:1:6.0
Load data in caliber .375 Swiss P with .375 | 250gr | Hornady CX bullet and 99 powders. The key underlying parameters are shown in the table above.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 54,128 psi | 89% | 2772 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 52,852 psi | 87% | 2795 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,549 psi | 90% | 2864 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 51,982 psi | 85% | 2802 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,758 psi | 72% | 2759 fps | 97.5% |
| Accurate 4064 | <<locked>> | 88% | 53,098 psi | 87% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 53,345 psi | 88% | 2943 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 53,359 psi | 88% | 2881 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 54,578 psi | 90% | 2884 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 51,663 psi | 85% | 2920 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 52,475 psi | 86% | 2831 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 53,519 psi | 88% | 2802 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,330 psi | 88% | 3005 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 51,488 psi | 85% | 2920 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,824 psi | 90% | 2907 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 51,822 psi | 85% | 2877 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 54,578 psi | 90% | 3002 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 52,228 psi | 86% | 2979 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 50,720 psi | 83% | 2910 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,669 psi | 68% | 2792 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,963 psi | 77% | 2966 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,301 psi | 88% | 2900 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 51,750 psi | 85% | 2867 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 51,909 psi | 85% | 2841 fps | 97.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,056 psi | 89% | 2812 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 51,706 psi | 85% | 2858 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 52,576 psi | 86% | 2881 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 94% | 52,576 psi | 86% | 2940 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 92% | 53,098 psi | 87% | 2900 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 84% | 53,954 psi | 89% | 2890 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,563 psi | 90% | 2923 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 53,650 psi | 88% | 2927 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 52,910 psi | 87% | 2976 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,549 psi | 58% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 51,924 psi | 85% | 2844 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,259 psi | 89% | 2871 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,012 psi | 89% | 2867 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 53,780 psi | 88% | 2848 fps | 98.4% |
| IMR 4350 | <<locked>> | 96% | 52,533 psi | 86% | 2874 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 53,882 psi | 88% | 2877 fps | 98.3% |
| IMR 4831 | <<locked>> | 98% | 53,925 psi | 89% | 2933 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 53,113 psi | 87% | 2904 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 52,475 psi | 86% | 2831 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,142 psi | 87% | 2854 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 52,939 psi | 87% | 2808 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 53,867 psi | 88% | 2861 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,214 psi | 87% | 2867 fps | 99.2% |
| Lovex S070 | <<locked>> | 96% | 54,114 psi | 89% | 2904 fps | 98.7% |
| Norma 201 | <<locked>> | 84% | 52,156 psi | 86% | 2825 fps | 100% |
| Norma 202 | <<locked>> | 84% | 52,750 psi | 87% | 2825 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,346 psi | 89% | 2913 fps | 100% |
| Norma 204 | <<locked>> | 96% | 52,852 psi | 87% | 2920 fps | 96.7% |
| Norma MRPᴾ | <<locked>> | 100% | 46,673 psi | 77% | 2920 fps | 97.2% |
| Norma URP | <<locked>> | 96% | 52,388 psi | 86% | 2930 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 51,547 psi | 85% | 2887 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 54,998 psi | 90% | 2982 fps | 99.3% |
| Ramshot TAC | <<locked>> | 82% | 52,576 psi | 86% | 2851 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 82% | 52,286 psi | 86% | 2867 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,143 psi | 59% | 1821 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 52,895 psi | 87% | 2867 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 52,214 psi | 86% | 2940 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 51,895 psi | 85% | 2976 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,229 psi | 87% | 2966 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 52,547 psi | 86% | 2992 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 52,924 psi | 87% | 2802 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 52,678 psi | 86% | 2825 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 51,605 psi | 85% | 2861 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 49,327 psi | 81% | 2887 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 92% | 51,909 psi | 85% | 2841 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,214 psi | 87% | 2867 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,142 psi | 87% | 2854 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 53,867 psi | 88% | 2861 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,114 psi | 89% | 2904 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 53,621 psi | 88% | 2927 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 54,520 psi | 90% | 2884 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 51,909 psi | 85% | 2851 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 53,577 psi | 88% | 2762 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 53,954 psi | 89% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,301 psi | 88% | 2822 fps | 98.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 48,863 psi | 80% | 2881 fps | 96.2% |
| Somchem S335 | <<locked>> | 84% | 53,040 psi | 87% | 2759 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,317 psi | 89% | 2871 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 52,112 psi | 86% | 2861 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,259 psi | 89% | 2982 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,038 psi | 82% | 2867 fps | 97.3% |
| Vihtavuori N133 | <<locked>> | 84% | 53,998 psi | 89% | 2746 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 52,576 psi | 86% | 2785 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,388 psi | 88% | 2805 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 53,505 psi | 88% | 2838 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 54,998 psi | 90% | 2927 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 82% | 52,808 psi | 87% | 2828 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,897 psi | 90% | 2848 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 53,867 psi | 88% | 2930 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,122 psi | 76% | 2867 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,071 psi | 90% | 2900 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 52,866 psi | 87% | 2874 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 52,779 psi | 87% | 2943 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,260 psi | 61% | 2812 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 51,779 psi | 85% | 2861 fps | 100% |
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 50,792 psi | 83% | 2726 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,134 psi | 71% | 2651 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,024 psi | 84% | 2815 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,569 psi | 70% | 2635 fps | 95.1% |
| Accurate 3100 | <<locked>> | 94% | 35,360 psi | 58% | 2585 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 40,872 psi | 67% | 2651 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 32,430 psi | 53% | 2533 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 46,978 psi | 77% | 2772 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 39,900 psi | 66% | 2621 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 98% | 48,428 psi | 80% | 2861 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,124 psi | 81% | 2779 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,038 psi | 82% | 2756 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,062 psi | 71% | 2818 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 45,194 psi | 74% | 2805 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,624 psi | 65% | 2644 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,569 psi | 70% | 2710 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,734 psi | 50% | 2493 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,374 psi | 56% | 2625 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 98% | 47,456 psi | 78% | 2848 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,369 psi | 47% | 2454 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 90% | 32,663 psi | 54% | 2635 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,528 psi | 76% | 2785 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 39,378 psi | 65% | 2651 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 42,844 psi | 70% | 2677 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,691 psi | 83% | 2762 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,225 psi | 79% | 2802 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,147 psi | 66% | 2654 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 40,103 psi | 66% | 2707 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 86% | 43,743 psi | 72% | 2730 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 47,427 psi | 78% | 2785 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,152 psi | 46% | 2392 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,685 psi | 72% | 2759 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 42,540 psi | 70% | 2782 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,542 psi | 44% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,614 psi | 75% | 2736 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 47,529 psi | 78% | 2772 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,887 psi | 69% | 2657 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,440 psi | 73% | 2684 fps | 96.6% |
| IMR 4350 | <<locked>> | 90% | 43,323 psi | 71% | 2710 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,018 psi | 69% | 2661 fps | 95.8% |
| IMR 4831 | <<locked>> | 82% | 31,604 psi | 52% | 2497 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 43,627 psi | 72% | 2740 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 49,124 psi | 81% | 2779 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,369 psi | 76% | 2749 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,789 psi | 77% | 2707 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 41,814 psi | 69% | 2657 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 36,477 psi | 60% | 2549 fps | 95.7% |
| Lovex S070 | <<locked>> | 86% | 39,465 psi | 65% | 2635 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 45,832 psi | 75% | 2723 fps | 100% |
| Norma 202 | <<locked>> | 80% | 46,296 psi | 76% | 2726 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,945 psi | 69% | 2700 fps | 99.3% |
| Norma 204 | <<locked>> | 92% | 46,122 psi | 76% | 2802 fps | 95% |
| Norma MRP | <<locked>> | 96% | 40,741 psi | 67% | 2795 fps | 95.4% |
| Norma URP | <<locked>> | 82% | 32,837 psi | 54% | 2536 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 41,771 psi | 69% | 2717 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 36,637 psi | 60% | 2635 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 49,023 psi | 80% | 2792 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,863 psi | 80% | 2812 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,876 psi | 44% | 1627 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,611 psi | 67% | 2641 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,382 psi | 75% | 2825 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,637 psi | 60% | 2687 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 32,271 psi | 53% | 2549 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 34,606 psi | 57% | 2618 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 49,748 psi | 82% | 2756 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,555 psi | 72% | 2671 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 37,043 psi | 61% | 2595 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 46,180 psi | 76% | 2831 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 86% | 42,844 psi | 70% | 2677 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 82% | 36,477 psi | 60% | 2549 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,369 psi | 76% | 2749 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,814 psi | 69% | 2657 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 39,465 psi | 65% | 2635 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,232 psi | 63% | 2648 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,427 psi | 78% | 2766 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,585 psi | 75% | 2746 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,239 psi | 78% | 2667 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,421 psi | 65% | 2533 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,002 psi | 67% | 2605 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 45,730 psi | 75% | 2825 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 46,746 psi | 77% | 2667 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,355 psi | 78% | 2762 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 37,739 psi | 62% | 2598 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 27,412 psi | 45% | 2431 fps | 97.2% |
| Somchem S385 | <<locked>> | 94% | 40,930 psi | 67% | 2697 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 47,718 psi | 78% | 2657 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,453 psi | 71% | 2648 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,034 psi | 72% | 2661 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,998 psi | 59% | 2533 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 32,053 psi | 53% | 2484 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 49,371 psi | 81% | 2776 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,308 psi | 69% | 2651 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,502 psi | 52% | 2484 fps | 95% |
| Vihtavuori N555 | <<locked>> | 88% | 30,676 psi | 50% | 2533 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,836 psi | 52% | 2461 fps | 97.7% |
| Winchester 748 | <<locked>> | 80% | 49,443 psi | 81% | 2825 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,277 psi | 66% | 2710 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,672 psi | 44% | 2470 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,194 psi | 74% | 2749 fps | 99.9% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 99 powders for .375 Swiss P loaded with the .375 | 250gr | Hornady CX. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,005 fps; across all powders the maximum-charge window runs from 1,778 fps to 3,005 fps. Accurate 3100 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 (420 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.