Load Specifications
Load data in caliber 37 XC with .375 | 350gr | Woodleigh FMJ bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, IMR 7828 SSC and Winchester StaBALL HD.
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: 30"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 62,627 psi | 90% | 2690 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 60,060 psi | 86% | 2664 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 60,336 psi | 87% | 2812 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 61,366 psi | 88% | 2818 fps | 100% |
| ADI APS 450 | <<locked>> | 82% | 61,061 psi | 88% | 2008 fps | 100% |
| ADI AR 2208 | <<locked>> | 82% | 60,075 psi | 86% | 2608 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 60,553 psi | 87% | 2736 fps | 100% |
| ADI AR 2213 | <<locked>> | 96% | 62,352 psi | 90% | 2805 fps | 100% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,431 psi | 75% | 2674 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 45,179 psi | 65% | 2654 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,833 psi | 67% | 2648 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 60,742 psi | 87% | 2733 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 60,742 psi | 87% | 2733 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 61,873 psi | 89% | 2625 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 60,771 psi | 87% | 2710 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 62,207 psi | 89% | 2720 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 59,988 psi | 86% | 2726 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 96% | 62,352 psi | 90% | 2792 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 96% | 59,770 psi | 86% | 2694 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 59,379 psi | 85% | 2766 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 60,959 psi | 88% | 2795 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 48,718 psi | 70% | 2710 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 59,437 psi | 85% | 2720 fps | 99.4% |
| Bofors RP15 | <<locked>> | 98% | 61,177 psi | 88% | 2779 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,259 psi | 79% | 2743 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 62,352 psi | 90% | 2792 fps | 100% |
| Bofors RP7 | <<locked>> | 86% | 61,583 psi | 88% | 2661 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 57,798 psi | 83% | 2743 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 61,482 psi | 88% | 2720 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 60,133 psi | 86% | 2680 fps | 100% |
| Hodgdon H4831 | <<locked>> | 94% | 62,062 psi | 89% | 2743 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 94% | 60,756 psi | 87% | 2726 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 60,959 psi | 88% | 2628 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 58,088 psi | 83% | 2854 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 62,526 psi | 90% | 2766 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,391 psi | 54% | 1608 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 59,756 psi | 86% | 2654 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 86% | 62,961 psi | 90% | 2677 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 60,031 psi | 86% | 2651 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 62,598 psi | 90% | 2717 fps | 100% |
| IMR 7828 SSC | <<locked>> | 96% | 60,379 psi | 87% | 2789 fps | 100% |
| IMR 7977 Enduronᴾ | <<locked>> | 100% | 60,974 psi | 88% | 2664 fps | 96.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 42,511 psi | 61% | 2575 fps | 99.5% |
| Lovex S065 | <<locked>> | 86% | 60,133 psi | 86% | 2628 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 62,120 psi | 89% | 2677 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 59,799 psi | 86% | 2661 fps | 100% |
| Norma 204 | <<locked>> | 88% | 61,032 psi | 88% | 2717 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 42,728 psi | 61% | 2598 fps | 100% |
| Norma MRP | <<locked>> | 94% | 62,685 psi | 90% | 2812 fps | 100% |
| Norma URP | <<locked>> | 88% | 61,830 psi | 89% | 2690 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 61,482 psi | 88% | 2805 fps | 100% |
| Ramshot Hunter | <<locked>> | 88% | 60,568 psi | 87% | 2710 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 59,756 psi | 86% | 2740 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,276 psi | 55% | 1647 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 62,540 psi | 90% | 2664 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 62,062 psi | 89% | 2703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 59,944 psi | 86% | 2690 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 62,685 psi | 90% | 2772 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 59,045 psi | 85% | 2851 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 53,925 psi | 77% | 2776 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 59,596 psi | 86% | 2598 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 61,583 psi | 88% | 2703 fps | 100% |
| Rottweil R 905 | <<locked>> | 92% | 59,596 psi | 86% | 2717 fps | 100% |
| Rottweil R 907 | <<locked>> | 86% | 61,583 psi | 88% | 2661 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 86% | 60,133 psi | 86% | 2628 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 62,120 psi | 89% | 2677 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 61,177 psi | 88% | 2657 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 62,526 psi | 90% | 2503 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 59,422 psi | 85% | 2592 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 59,161 psi | 85% | 2710 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 62,830 psi | 90% | 2635 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 59,364 psi | 85% | 2654 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 62,903 psi | 90% | 2687 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 60,118 psi | 86% | 2684 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 60,379 psi | 87% | 2562 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 59,901 psi | 86% | 2635 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 59,582 psi | 86% | 2667 fps | 100% |
| Vihtavuori N170ᴾ | <<locked>> | 100% | 58,247 psi | 84% | 2703 fps | 98.1% |
| Vihtavuori N550 | <<locked>> | 88% | 62,729 psi | 90% | 2690 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 62,134 psi | 89% | 2717 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 62,279 psi | 89% | 2825 fps | 100% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 62,105 psi | 89% | 2805 fps | 100% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 54,940 psi | 79% | 2772 fps | 99.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 51,866 psi | 75% | 2776 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 59,321 psi | 85% | 2595 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 61,641 psi | 89% | 2723 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 58,494 psi | 84% | 2785 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 60,104 psi | 86% | 2687 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 30"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 36,796 psi | 53% | 2326 fps | 99.9% |
| Accurate 4350 | <<locked>> | 80% | 49,037 psi | 70% | 2526 fps | 100% |
| Accurate High Country | 90.6 gr | 80% | 39,943 psi | 57% | 2493 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 80% | 37,637 psi | 54% | 2441 fps | 97.2% |
| ADI APS 450 | <<locked>> | 80% | 59,103 psi | 85% | 1985 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 56,565 psi | 81% | 2566 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 40,843 psi | 59% | 2444 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 80% | 36,477 psi | 52% | 2392 fps | 97.8% |
| ADI AR 2217 | <<locked>> | 82% | 29,008 psi | 42% | 2211 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 96% | 39,334 psi | 56% | 2533 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 24,729 psi | 36% | 2142 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,191 psi | 59% | 2444 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,191 psi | 59% | 2444 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 58,102 psi | 83% | 2582 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,050 psi | 68% | 2533 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 54,317 psi | 78% | 2628 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,814 psi | 59% | 2438 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,753 psi | 53% | 2402 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,534 psi | 51% | 2349 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,763 psi | 44% | 2300 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,117 psi | 56% | 2493 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 39,218 psi | 56% | 2536 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 38,711 psi | 56% | 2372 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 34,243 psi | 49% | 2346 fps | 98.2% |
| Bofors RP30 | <<locked>> | 80% | 28,152 psi | 40% | 2234 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 36,753 psi | 53% | 2402 fps | 98.9% |
| Bofors RP7 | <<locked>> | 80% | 51,198 psi | 74% | 2526 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 29,472 psi | 42% | 2228 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 80% | 50,531 psi | 73% | 2579 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 52,982 psi | 76% | 2585 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 38,928 psi | 56% | 2392 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,203 psi | 55% | 2375 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,338 psi | 64% | 2421 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 30,023 psi | 43% | 2326 fps | 97.8% |
| Hodgdon Superformance | <<locked>> | 80% | 50,386 psi | 72% | 2615 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,079 psi | 40% | 1437 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,659 psi | 67% | 2477 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,533 psi | 75% | 2546 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 46,586 psi | 67% | 2477 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,553 psi | 58% | 2385 fps | 98.2% |
| IMR 7828 SSC | 87.2 gr | 80% | 35,143 psi | 50% | 2375 fps | 97.5% |
| IMR 7977 Enduron | <<locked>> | 96% | 53,679 psi | 77% | 2566 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 88% | 28,761 psi | 41% | 2270 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 50,227 psi | 72% | 2500 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,515 psi | 70% | 2500 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 31,821 psi | 46% | 2224 fps | 99.4% |
| Norma 204 | <<locked>> | 80% | 46,847 psi | 67% | 2523 fps | 99.9% |
| Norma 217 | <<locked>> | 82% | 23,757 psi | 34% | 2142 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 38,479 psi | 55% | 2464 fps | 99.8% |
| Norma URP | <<locked>> | 80% | 47,950 psi | 69% | 2516 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 34,722 psi | 50% | 2382 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 80% | 46,760 psi | 67% | 2526 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 30,937 psi | 44% | 2277 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,674 psi | 41% | 1473 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 58,624 psi | 84% | 2618 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 57,856 psi | 83% | 2657 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,008 psi | 70% | 2552 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,137 psi | 68% | 2575 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 28,906 psi | 42% | 2303 fps | 98.4% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 32,213 psi | 46% | 2375 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 56,028 psi | 80% | 2556 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 42,076 psi | 60% | 2418 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 80% | 40,321 psi | 58% | 2428 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 80% | 51,198 psi | 74% | 2526 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,227 psi | 72% | 2500 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,515 psi | 70% | 2500 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 57,421 psi | 82% | 2612 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 55,463 psi | 80% | 2425 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,979 psi | 70% | 2454 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,987 psi | 57% | 2425 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 55,666 psi | 80% | 2552 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 42,714 psi | 61% | 2408 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 45,237 psi | 65% | 2474 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,814 psi | 59% | 2408 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 53,229 psi | 76% | 2480 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,284 psi | 71% | 2503 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,389 psi | 51% | 2300 fps | 98.9% |
| Vihtavuori N170 | <<locked>> | 92% | 44,512 psi | 64% | 2493 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 48,602 psi | 70% | 2513 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,726 psi | 57% | 2411 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,551 psi | 55% | 2454 fps | 98% |
| Vihtavuori N565 | <<locked>> | 80% | 31,720 psi | 46% | 2300 fps | 96.1% |
| Vihtavuori N568 | <<locked>> | 86% | 33,678 psi | 48% | 2392 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 92% | 39,276 psi | 56% | 2546 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,298 psi | 69% | 2461 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,676 psi | 73% | 2582 fps | 100% |
| Winchester StaBALL HD | 89.7 gr | 80% | 31,836 psi | 46% | 2398 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,260 psi | 54% | 2346 fps | 98.9% |
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 88 powders for 37 XC loaded with the .375 | 350gr | Woodleigh FMJ. Hodgdon Retumbo delivers the highest muzzle velocity at 2,854 fps; across all powders the maximum-charge window runs from 1,608 fps to 2,854 fps. ADI AR 2217 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (480 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 350.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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 High Country, IMR 7828 SSC, Winchester StaBALL HD rank at the top here: for 37 XC with the .375 | 350gr | 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.