Load Specifications
Load data in caliber .375 Swiss P with .375 | 300gr | Woodleigh FMJ bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Bofors RP5, Vihtavuori N560 and Norma MRP.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 84% | 54,375 psi | 89% | 2638 fps | 99.6% |
| Accurate 3100 | <<locked>> | 96% | 52,069 psi | 85% | 2644 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 54,027 psi | 89% | 2723 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 54,824 psi | 90% | 2831 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 52,765 psi | 87% | 2601 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,766 psi | 90% | 2730 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 52,301 psi | 86% | 2727 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,421 psi | 65% | 2524 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,679 psi | 88% | 2622 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,737 psi | 90% | 2733 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 52,214 psi | 86% | 2699 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,172 psi | 89% | 2719 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 51,837 psi | 85% | 2725 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 53,142 psi | 87% | 2708 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,067 psi | 82% | 2704 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 52,605 psi | 86% | 2789 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,302 psi | 89% | 2805 fps | 99.3% |
| Bofors RP3 | <<locked>> | 82% | 54,578 psi | 90% | 2639 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,498 psi | 75% | 2631 fps | 96.7% |
| Bofors RP5 | <<locked>> | 96% | 51,837 psi | 85% | 2769 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 53,809 psi | 88% | 2633 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 44,860 psi | 74% | 2638 fps | 97.4% |
| Hodgdon H380 | <<locked>> | 82% | 54,679 psi | 90% | 2656 fps | 100% |
| Hodgdon H414 | <<locked>> | 84% | 53,432 psi | 88% | 2697 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 88% | 54,012 psi | 89% | 2713 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 98% | 51,721 psi | 85% | 2661 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,955 psi | 90% | 2710 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,042 psi | 90% | 2660 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,587 psi | 78% | 2799 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 86% | 52,112 psi | 86% | 2711 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,608 psi | 62% | 1653 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,056 psi | 90% | 2661 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 53,795 psi | 88% | 2610 fps | 99.6% |
| IMR 4350 | <<locked>> | 90% | 54,969 psi | 90% | 2710 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,025 psi | 85% | 2648 fps | 99.7% |
| IMR 4831 | <<locked>> | 92% | 52,156 psi | 86% | 2643 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,027 psi | 89% | 2703 fps | 98% |
| IMR 7828 SSC | <<locked>> | 96% | 53,925 psi | 89% | 2766 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 52,359 psi | 86% | 2606 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 53,737 psi | 88% | 2650 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,879 psi | 84% | 2608 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 52,069 psi | 85% | 2665 fps | 98.5% |
| Norma MRP | <<locked>> | 96% | 55,027 psi | 90% | 2802 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 52,736 psi | 87% | 2667 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 53,577 psi | 88% | 2770 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 54,911 psi | 90% | 2722 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 50,256 psi | 83% | 2689 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,942 psi | 62% | 1692 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,476 psi | 89% | 2644 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 51,677 psi | 85% | 2690 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,780 psi | 88% | 2705 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 51,967 psi | 85% | 2728 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,819 psi | 79% | 2747 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 84% | 54,795 psi | 90% | 2638 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,779 psi | 87% | 2649 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 53,635 psi | 88% | 2709 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 53,809 psi | 88% | 2633 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 52,359 psi | 86% | 2606 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 53,737 psi | 88% | 2690 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 52,692 psi | 87% | 2644 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 51,909 psi | 85% | 2479 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,114 psi | 90% | 2613 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,185 psi | 87% | 2746 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 54,563 psi | 90% | 2631 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,186 psi | 89% | 2643 fps | 97.3% |
| Somchem S365 | <<locked>> | 90% | 52,417 psi | 86% | 2671 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,172 psi | 89% | 2685 fps | 99.5% |
| Unknown powder | <<locked>> | 86% | 53,142 psi | 87% | 2670 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 52,924 psi | 87% | 2573 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 53,301 psi | 88% | 2639 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 51,619 psi | 85% | 2636 fps | 99% |
| Vihtavuori N550 | <<locked>> | 86% | 53,824 psi | 88% | 2684 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,071 psi | 90% | 2730 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 52,011 psi | 85% | 2747 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,025 psi | 85% | 2713 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 53,838 psi | 88% | 2626 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 53,432 psi | 88% | 2697 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,547 psi | 86% | 2830 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 51,938 psi | 85% | 2648 fps | 98.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 80% | 47,805 psi | 78% | 2536 fps | 98.8% |
| Accurate 3100 | <<locked>> | 80% | 30,400 psi | 50% | 2232 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 41,133 psi | 68% | 2513 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 94% | 47,630 psi | 78% | 2713 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 49,676 psi | 82% | 2555 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,508 psi | 65% | 2458 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 42,888 psi | 70% | 2554 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 96% | 34,084 psi | 56% | 2411 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,575 psi | 83% | 2578 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,653 psi | 65% | 2481 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,368 psi | 74% | 2595 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,407 psi | 65% | 2456 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,217 psi | 61% | 2450 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,341 psi | 48% | 2262 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,240 psi | 48% | 2272 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,517 psi | 52% | 2374 fps | 97.3% |
| Bofors RP15 | <<locked>> | 88% | 36,883 psi | 61% | 2487 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 51,184 psi | 84% | 2592 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,626 psi | 68% | 2577 fps | 95.8% |
| Bofors RP5 | 91.8 gr | 86% | 37,217 psi | 61% | 2497 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 44,657 psi | 73% | 2481 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 96% | 39,334 psi | 65% | 2523 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 51,300 psi | 84% | 2606 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 46,572 psi | 76% | 2585 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 80% | 42,047 psi | 69% | 2507 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 94% | 45,498 psi | 75% | 2556 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 44,962 psi | 74% | 2545 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,347 psi | 61% | 2378 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 34,519 psi | 57% | 2500 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 41,829 psi | 69% | 2534 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,601 psi | 45% | 1475 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,892 psi | 80% | 2569 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,776 psi | 78% | 2513 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 40,219 psi | 66% | 2457 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,948 psi | 75% | 2546 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 35,853 psi | 59% | 2354 fps | 98.8% |
| IMR 4955 Enduron | <<locked>> | 86% | 42,163 psi | 69% | 2500 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 90% | 43,961 psi | 72% | 2589 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 43,584 psi | 72% | 2461 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 41,814 psi | 69% | 2448 fps | 98.2% |
| Lovex S071 | <<locked>> | 84% | 29,820 psi | 49% | 2216 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 39,798 psi | 65% | 2444 fps | 95.7% |
| Norma MRP | 90.3 gr | 82% | 33,924 psi | 56% | 2401 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 40,640 psi | 67% | 2465 fps | 99.5% |
| Ramshot Grand | <<locked>> | 88% | 42,830 psi | 70% | 2581 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 39,465 psi | 65% | 2457 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 88% | 37,275 psi | 61% | 2447 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,108 psi | 46% | 1510 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,039 psi | 84% | 2591 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,153 psi | 79% | 2638 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,959 psi | 67% | 2493 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,349 psi | 65% | 2501 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 33,605 psi | 55% | 2429 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 48,124 psi | 79% | 2541 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,714 psi | 72% | 2493 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 38,551 psi | 63% | 2439 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 44,657 psi | 73% | 2481 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,584 psi | 72% | 2461 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 41,814 psi | 69% | 2487 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,356 psi | 81% | 2594 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,834 psi | 80% | 2437 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,583 psi | 70% | 2410 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 35,737 psi | 59% | 2425 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 48,225 psi | 79% | 2539 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 44,541 psi | 73% | 2484 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 37,362 psi | 61% | 2428 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,403 psi | 56% | 2321 fps | 95.1% |
| Unknown powder | <<locked>> | 80% | 43,613 psi | 72% | 2514 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 41,553 psi | 68% | 2398 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,801 psi | 72% | 2489 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 88% | 37,405 psi | 61% | 2383 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 44,396 psi | 73% | 2532 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 32,750 psi | 54% | 2333 fps | 98.5% |
| Vihtavuori N560 | 99.2 gr | 92% | 45,527 psi | 75% | 2634 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 96% | 44,367 psi | 73% | 2601 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,046 psi | 67% | 2431 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,572 psi | 76% | 2585 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,962 psi | 43% | 2254 fps | 98.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 39,131 psi | 64% | 2423 fps | 95.6% |
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 79 powders for .375 Swiss P loaded with the .375 | 300gr | Woodleigh FMJ. Accurate MAGPRO delivers the highest muzzle velocity at 2,831 fps; across all powders the maximum-charge window runs from 1,653 fps to 2,831 fps. ADI AR 2225 gives the best case fill at 100 %, and 79 of the 79 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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. Bofors RP5, Vihtavuori N560, Norma MRP rank at the top here: for .375 Swiss P with the .375 | 300gr | Woodleigh FMJ 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.