Load Specifications
Load data in caliber .375 Swiss P with .375 | 300gr | Nosler Partition bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Alliant Reloder-26 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.
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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 54,462 psi | 89% | 2713 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 52,736 psi | 87% | 2700 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 52,721 psi | 87% | 2802 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 84% | 55,085 psi | 90% | 2667 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,548 psi | 88% | 2746 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 98% | 54,795 psi | 90% | 2802 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,724 psi | 62% | 2543 fps | 97.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 53,693 psi | 88% | 2746 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 52,721 psi | 87% | 2641 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,679 psi | 88% | 2753 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,679 psi | 90% | 2769 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 52,997 psi | 87% | 2736 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,143 psi | 89% | 2799 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,795 psi | 90% | 2772 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,471 psi | 78% | 2723 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,882 psi | 90% | 2861 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,968 psi | 87% | 2779 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 53,447 psi | 88% | 2657 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,265 psi | 71% | 2651 fps | 96.8% |
| Bofors RP5 | <<locked>> | 98% | 54,143 psi | 89% | 2799 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 52,837 psi | 87% | 2651 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,891 psi | 77% | 2664 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 82% | 53,780 psi | 88% | 2677 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,781 psi | 90% | 2753 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 86% | 54,317 psi | 89% | 2710 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 96% | 54,824 psi | 90% | 2743 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,809 psi | 88% | 2730 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,998 psi | 89% | 2680 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,470 psi | 76% | 2769 fps | 99% |
| Hodgdon Superformance | <<locked>> | 88% | 54,795 psi | 90% | 2789 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,796 psi | 60% | 1663 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,592 psi | 90% | 2648 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,911 psi | 89% | 2687 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,389 psi | 89% | 2677 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 53,272 psi | 87% | 2694 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,968 psi | 87% | 2680 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 98% | 52,315 psi | 86% | 2776 fps | 98.1% |
| Lovex S062 | <<locked>> | 82% | 54,911 psi | 90% | 2641 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,549 psi | 90% | 2671 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 52,605 psi | 86% | 2667 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,457 psi | 80% | 2628 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 54,505 psi | 89% | 2740 fps | 99.1% |
| Norma MRP | <<locked>> | 96% | 53,635 psi | 88% | 2822 fps | 99.9% |
| Norma URP | <<locked>> | 90% | 55,056 psi | 90% | 2736 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 52,663 psi | 86% | 2792 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 53,679 psi | 88% | 2740 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,647 psi | 83% | 2733 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,434 psi | 61% | 1699 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,505 psi | 88% | 2661 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,070 psi | 89% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 52,605 psi | 86% | 2723 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,607 psi | 90% | 2802 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,456 psi | 76% | 2766 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 53,650 psi | 88% | 2654 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 51,779 psi | 85% | 2667 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 52,359 psi | 86% | 2726 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 52,837 psi | 87% | 2651 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,549 psi | 90% | 2671 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 54,911 psi | 90% | 2641 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 52,605 psi | 86% | 2667 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,085 psi | 90% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,447 psi | 89% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,056 psi | 89% | 2628 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 51,909 psi | 85% | 2720 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 53,606 psi | 88% | 2651 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,229 psi | 87% | 2664 fps | 97.5% |
| Somchem S365 | <<locked>> | 92% | 54,578 psi | 90% | 2736 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 52,953 psi | 87% | 2703 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 54,795 psi | 90% | 2625 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,417 psi | 88% | 2677 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 52,301 psi | 86% | 2680 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 52,620 psi | 86% | 2684 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,882 psi | 88% | 2749 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,809 psi | 88% | 2812 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,371 psi | 81% | 2730 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 52,692 psi | 87% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,926 psi | 90% | 2753 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,560 psi | 83% | 2848 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 52,866 psi | 87% | 2697 fps | 98.9% |
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 3100 | <<locked>> | 80% | 29,675 psi | 49% | 2251 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 40,176 psi | 66% | 2490 fps | 99.7% |
| Accurate MAGPRO | 101.2 gr | 92% | 45,818 psi | 75% | 2680 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 48,776 psi | 80% | 2572 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 36,332 psi | 60% | 2425 fps | 95% |
| ADI AR 2213 | <<locked>> | 90% | 41,974 psi | 69% | 2572 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 96% | 33,243 psi | 55% | 2428 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 36,448 psi | 60% | 2425 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,574 psi | 81% | 2595 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,899 psi | 64% | 2500 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,324 psi | 73% | 2615 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 36,100 psi | 59% | 2421 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 86% | 36,303 psi | 60% | 2470 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,631 psi | 47% | 2280 fps | 98.6% |
| Alliant Reloder-25 | <<locked>> | 84% | 28,572 psi | 47% | 2293 fps | 95.5% |
| Alliant Reloder-26 | 89 gr | 80% | 30,748 psi | 50% | 2398 fps | 97.5% |
| Bofors RP15 | <<locked>> | 88% | 35,955 psi | 59% | 2461 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 50,053 psi | 82% | 2608 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 37,985 psi | 62% | 2539 fps | 95.1% |
| Bofors RP5 | <<locked>> | 86% | 36,303 psi | 60% | 2470 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 43,816 psi | 72% | 2500 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 38,479 psi | 63% | 2497 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 50,241 psi | 82% | 2621 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,032 psi | 69% | 2536 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 80% | 44,817 psi | 74% | 2552 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 90% | 44,860 psi | 74% | 2579 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 44,048 psi | 72% | 2566 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,463 psi | 60% | 2395 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 35,969 psi | 59% | 2530 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 40,872 psi | 67% | 2552 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,499 psi | 45% | 1483 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,329 psi | 84% | 2602 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,436 psi | 65% | 2434 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,266 psi | 74% | 2526 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 38,522 psi | 63% | 2448 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 43,932 psi | 72% | 2526 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 92% | 42,946 psi | 71% | 2608 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 51,706 psi | 85% | 2595 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,743 psi | 70% | 2480 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 40,973 psi | 67% | 2464 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 29,167 psi | 48% | 2238 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 38,914 psi | 64% | 2461 fps | 95.8% |
| Norma MRP | 88.5 gr | 82% | 33,112 psi | 54% | 2421 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 39,755 psi | 65% | 2484 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 39,740 psi | 65% | 2552 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 38,537 psi | 63% | 2477 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 90% | 35,375 psi | 58% | 2441 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,007 psi | 46% | 1519 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,241 psi | 82% | 2612 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,036 psi | 77% | 2657 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,972 psi | 66% | 2513 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,493 psi | 63% | 2523 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 32,866 psi | 54% | 2451 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 47,181 psi | 77% | 2559 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 40,234 psi | 66% | 2461 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 82% | 35,259 psi | 58% | 2405 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 43,816 psi | 72% | 2500 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,743 psi | 70% | 2480 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 51,706 psi | 85% | 2595 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,973 psi | 67% | 2464 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,312 psi | 79% | 2612 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,182 psi | 79% | 2454 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,800 psi | 69% | 2428 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 37,304 psi | 61% | 2454 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 47,297 psi | 78% | 2556 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 43,729 psi | 72% | 2503 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 36,405 psi | 60% | 2444 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 33,533 psi | 55% | 2339 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 45,179 psi | 74% | 2487 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,162 psi | 68% | 2480 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 35,331 psi | 58% | 2375 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 40,567 psi | 67% | 2484 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 31,879 psi | 52% | 2352 fps | 98.6% |
| Vihtavuori N560 | <<locked>> | 90% | 43,874 psi | 72% | 2641 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 94% | 40,393 psi | 66% | 2566 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,118 psi | 66% | 2448 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,163 psi | 69% | 2539 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,338 psi | 42% | 2274 fps | 98.3% |
| Winchester Supreme 780 | <<locked>> | 86% | 37,463 psi | 62% | 2428 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 | Nosler Partition. Alliant Reloder-26 delivers the highest muzzle velocity at 2,861 fps; across all powders the maximum-charge window runs from 1,663 fps to 2,861 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 60–90 %, 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-23, Alliant Reloder-25 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. Accurate MAGPRO, Alliant Reloder-26, Norma MRP rank at the top here: for .375 Swiss P with the .375 | 300gr | Nosler Partition 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.