Load Specifications
Bullet:.375 | 300gr | Nosler Solid
Bullet Manufacturer:Nosler
Bullet Weight:300 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:37 XC load data
Case Length (l3):3.087"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:139.8 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:30"
Max. allowed Pressure:69,618 psi
Recommended Twist Rate:1:6.0
Load data in caliber 37 XC with .375 | 300gr | Nosler Solid bullet and 103 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Accurate MAGPRO 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: 30"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 62,221 psi | 89% | 2736 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 62,816 psi | 90% | 2838 fps | 100% |
| Accurate 3100 | <<locked>> | 98% | 58,900 psi | 85% | 2854 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 62,714 psi | 90% | 2795 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 60,829 psi | 87% | 2887 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 61,699 psi | 89% | 3031 fps | 99.7% |
| ADI APS 450 | <<locked>> | 84% | 62,845 psi | 90% | 2185 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 61,975 psi | 89% | 2841 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 61,482 psi | 88% | 2956 fps | 100% |
| ADI AR 2213 | <<locked>> | 98% | 59,030 psi | 85% | 2966 fps | 99.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,079 psi | 66% | 2756 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,930 psi | 59% | 2726 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 59,524 psi | 86% | 2812 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 59,567 psi | 86% | 2838 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 61,511 psi | 88% | 2936 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 59,001 psi | 85% | 2907 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 60,829 psi | 87% | 2943 fps | 100% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 62,685 psi | 90% | 3009 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 59,538 psi | 86% | 2907 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,517 psi | 74% | 2881 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 60,655 psi | 87% | 3018 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 60,974 psi | 88% | 2923 fps | 98.4% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,421 psi | 82% | 2940 fps | 100% |
| Bofors RP3 | <<locked>> | 84% | 60,800 psi | 87% | 2831 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,500 psi | 68% | 2828 fps | 99.2% |
| Bofors RP5ᴾ | <<locked>> | 100% | 62,685 psi | 90% | 3009 fps | 100% |
| Bofors RP7 | <<locked>> | 88% | 59,538 psi | 86% | 2838 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,807 psi | 73% | 2838 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 84% | 60,887 psi | 87% | 2858 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 62,656 psi | 90% | 2949 fps | 100% |
| Hodgdon H4350 | <<locked>> | 88% | 61,670 psi | 89% | 2904 fps | 100% |
| Hodgdon H4831 | <<locked>> | 96% | 59,146 psi | 85% | 2904 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 98% | 61,888 psi | 89% | 2940 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 61,699 psi | 89% | 2848 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 62,482 psi | 90% | 2877 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,488 psi | 73% | 2949 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 59,393 psi | 85% | 2943 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,883 psi | 53% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 62,352 psi | 90% | 2838 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 61,308 psi | 88% | 2818 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 59,959 psi | 86% | 2818 fps | 100% |
| IMR 4350 | <<locked>> | 92% | 60,974 psi | 88% | 2874 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 88% | 61,163 psi | 88% | 2861 fps | 100% |
| IMR 4831 | <<locked>> | 92% | 60,814 psi | 87% | 2874 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 61,163 psi | 88% | 2861 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 60,118 psi | 86% | 2884 fps | 99.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 60,626 psi | 87% | 2999 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 36,521 psi | 52% | 2635 fps | 96.6% |
| Lovex S060 | <<locked>> | 82% | 62,279 psi | 89% | 2792 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 61,670 psi | 89% | 2805 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 61,656 psi | 89% | 2851 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 59,582 psi | 86% | 2854 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,591 psi | 76% | 2776 fps | 100% |
| Norma 201 | <<locked>> | 82% | 62,917 psi | 90% | 2815 fps | 100% |
| Norma 203B | <<locked>> | 84% | 62,729 psi | 90% | 2871 fps | 100% |
| Norma 204 | <<locked>> | 92% | 62,584 psi | 90% | 2943 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 36,506 psi | 52% | 2661 fps | 98.8% |
| Norma MRP | <<locked>> | 98% | 62,859 psi | 90% | 3035 fps | 100% |
| Norma URP | <<locked>> | 92% | 62,801 psi | 90% | 2917 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 60,176 psi | 86% | 2851 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 61,714 psi | 89% | 3018 fps | 100% |
| Ramshot Hunter | <<locked>> | 92% | 61,670 psi | 89% | 2936 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,492 psi | 80% | 2894 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,797 psi | 54% | 1775 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 60,481 psi | 87% | 2848 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 62,845 psi | 90% | 2940 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 60,771 psi | 87% | 2913 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 58,987 psi | 85% | 2946 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,821 psi | 73% | 2946 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 45,803 psi | 66% | 2838 fps | 97.9% |
| Rottweil R 902 | <<locked>> | 82% | 59,886 psi | 86% | 2769 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 60,988 psi | 88% | 2828 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 62,801 psi | 90% | 2920 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 96% | 60,336 psi | 87% | 2930 fps | 100% |
| Rottweil R 907 | <<locked>> | 88% | 59,538 psi | 86% | 2838 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 90% | 61,656 psi | 89% | 2851 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 61,670 psi | 89% | 2805 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 59,582 psi | 86% | 2854 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 62,714 psi | 90% | 2890 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 62,961 psi | 90% | 2854 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 60,872 psi | 87% | 2690 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 61,206 psi | 88% | 2812 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 59,857 psi | 86% | 2927 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 62,946 psi | 90% | 2726 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 60,568 psi | 87% | 2822 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 60,814 psi | 87% | 2861 fps | 99.6% |
| Somchem S365 | <<locked>> | 92% | 59,103 psi | 85% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 60,771 psi | 87% | 2897 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 60,742 psi | 87% | 2717 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 60,713 psi | 87% | 2736 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 62,033 psi | 89% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 60,988 psi | 88% | 2858 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 60,162 psi | 86% | 2874 fps | 100% |
| Vihtavuori N540 | <<locked>> | 84% | 62,482 psi | 90% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 59,930 psi | 86% | 2871 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 62,120 psi | 89% | 2936 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 62,700 psi | 90% | 3038 fps | 99.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,143 psi | 78% | 2904 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 47,239 psi | 68% | 2844 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 60,742 psi | 87% | 2815 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 62,874 psi | 90% | 2949 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,942 psi | 82% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 61,134 psi | 88% | 2900 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 2495 | <<locked>> | 80% | 58,479 psi | 84% | 2694 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 55,230 psi | 79% | 2740 fps | 100% |
| Accurate 3100 | <<locked>> | 80% | 32,227 psi | 46% | 2408 fps | 98.3% |
| Accurate 4064 | <<locked>> | 80% | 55,521 psi | 80% | 2710 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 43,410 psi | 62% | 2641 fps | 100% |
| Accurate MAGPRO | 97.6 gr | 84% | 37,608 psi | 54% | 2621 fps | 95.3% |
| ADI APS 450 | <<locked>> | 80% | 58,769 psi | 84% | 2133 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 51,561 psi | 74% | 2700 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 36,332 psi | 52% | 2530 fps | 97.1% |
| ADI AR 2213 | <<locked>> | 82% | 34,563 psi | 50% | 2513 fps | 95% |
| ADI AR 2217 | <<locked>> | 92% | 35,520 psi | 51% | 2533 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 88% | 27,992 psi | 40% | 2392 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,576 psi | 76% | 2723 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 56,072 psi | 81% | 2792 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,655 psi | 60% | 2648 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,790 psi | 69% | 2756 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,289 psi | 52% | 2526 fps | 97.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 32,111 psi | 46% | 2470 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,951 psi | 44% | 2438 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 27,108 psi | 39% | 2356 fps | 97.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,431 psi | 48% | 2572 fps | 99.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 44,759 psi | 64% | 2657 fps | 95% |
| Bofors RP15 | <<locked>> | 82% | 32,039 psi | 46% | 2467 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 53,374 psi | 77% | 2736 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 31,850 psi | 46% | 2500 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 32,111 psi | 46% | 2470 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 46,398 psi | 67% | 2641 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 88% | 33,910 psi | 49% | 2497 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 53,548 psi | 77% | 2762 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,005 psi | 65% | 2687 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 80% | 47,703 psi | 69% | 2700 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 82% | 36,883 psi | 53% | 2520 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 82% | 36,216 psi | 52% | 2507 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,247 psi | 56% | 2533 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 58,639 psi | 84% | 2831 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 30,008 psi | 43% | 2480 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 44,309 psi | 64% | 2717 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,688 psi | 40% | 1549 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 58,552 psi | 84% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,230 psi | 78% | 2730 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 56,318 psi | 81% | 2769 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,974 psi | 60% | 2582 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,776 psi | 69% | 2667 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 41,365 psi | 59% | 2592 fps | 100% |
| IMR 4895 | <<locked>> | 80% | 57,551 psi | 83% | 2818 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 36,419 psi | 52% | 2474 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 84% | 35,433 psi | 51% | 2549 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 98% | 34,301 psi | 49% | 2579 fps | 95.8% |
| Lovex S060 | <<locked>> | 80% | 58,697 psi | 84% | 2749 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 54,665 psi | 79% | 2720 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 45,440 psi | 65% | 2618 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 43,656 psi | 63% | 2612 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 27,746 psi | 40% | 2293 fps | 96.8% |
| Norma 201 | <<locked>> | 80% | 59,219 psi | 85% | 2769 fps | 100% |
| Norma 203B | <<locked>> | 80% | 55,419 psi | 80% | 2779 fps | 100% |
| Norma 204 | <<locked>> | 80% | 41,698 psi | 60% | 2618 fps | 98.3% |
| Norma 217 | <<locked>> | 92% | 28,166 psi | 40% | 2434 fps | 95.4% |
| Norma MRP | 91.3 gr | 80% | 33,504 psi | 48% | 2539 fps | 97.9% |
| Norma URP | <<locked>> | 80% | 42,656 psi | 61% | 2628 fps | 100% |
| Ramshot Big Game | <<locked>> | 80% | 56,333 psi | 81% | 2805 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 34,882 psi | 50% | 2552 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 41,466 psi | 60% | 2628 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 28,906 psi | 42% | 2382 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,210 psi | 41% | 1585 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,258 psi | 77% | 2749 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,705 psi | 73% | 2792 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,134 psi | 62% | 2661 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,495 psi | 60% | 2680 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 29,008 psi | 42% | 2457 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 36,840 psi | 53% | 2651 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 56,376 psi | 81% | 2723 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 50,328 psi | 72% | 2690 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 37,681 psi | 54% | 2507 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 80% | 35,505 psi | 51% | 2510 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 80% | 46,398 psi | 67% | 2641 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,440 psi | 65% | 2618 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 54,665 psi | 79% | 2720 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,656 psi | 63% | 2612 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,561 psi | 74% | 2746 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 59,030 psi | 85% | 2805 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,691 psi | 73% | 2566 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,338 psi | 64% | 2566 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 35,186 psi | 51% | 2503 fps | 97% |
| Somchem S335 | <<locked>> | 80% | 59,350 psi | 85% | 2684 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 50,328 psi | 72% | 2687 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 38,305 psi | 55% | 2493 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 39,494 psi | 57% | 2589 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,085 psi | 52% | 2493 fps | 98% |
| Vihtavuori N135 | <<locked>> | 80% | 57,087 psi | 82% | 2674 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 56,985 psi | 82% | 2694 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 48,095 psi | 69% | 2612 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,150 psi | 63% | 2621 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 31,227 psi | 45% | 2375 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 80% | 55,216 psi | 79% | 2697 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 43,497 psi | 62% | 2628 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 34,606 psi | 50% | 2507 fps | 99.9% |
| Vihtavuori N560 | 93.5 gr | 82% | 36,187 psi | 52% | 2582 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 88% | 35,984 psi | 52% | 2572 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 94% | 38,392 psi | 55% | 2667 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,004 psi | 62% | 2582 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,136 psi | 65% | 2690 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,398 psi | 39% | 2461 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 32,895 psi | 47% | 2421 fps | 96% |
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 103 powders for 37 XC loaded with the .375 | 300gr | Nosler Solid. Vihtavuori N560 delivers the highest muzzle velocity at 3,038 fps; across all powders the maximum-charge window runs from 1,729 fps to 3,038 fps. ADI AR 2217 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (480 MPa), the top charges use 52–90 %, 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 2217, ADI AR 2225, Alliant Reloder-22 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. Vihtavuori N560, Accurate MAGPRO, Norma MRP rank at the top here: for 37 XC with the .375 | 300gr | Nosler Solid 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.