Load Specifications
Bullet:.375 | 300gr | Rhino Solid
Bullet Manufacturer:Rhino Bullets
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:1:16.5
Load data in caliber 37 XC with .375 | 300gr | Rhino Solid bullet and 106 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Vihtavuori N560 and Accurate MAGPRO.
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% | 61,873 psi | 89% | 2730 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 62,424 psi | 90% | 2831 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 62,526 psi | 90% | 2894 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 62,352 psi | 90% | 2789 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 60,394 psi | 87% | 2881 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 61,134 psi | 88% | 3018 fps | 99.6% |
| ADI APS 450 | <<locked>> | 84% | 62,932 psi | 90% | 2182 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 61,511 psi | 88% | 2831 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 60,974 psi | 88% | 2943 fps | 100% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 62,642 psi | 90% | 3012 fps | 99.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,658 psi | 66% | 2743 fps | 98.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,567 psi | 58% | 2717 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 62,540 psi | 90% | 2969 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 61,119 psi | 88% | 2940 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 62,917 psi | 90% | 2851 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 59,306 psi | 85% | 2831 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 60,872 psi | 87% | 2930 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 62,787 psi | 90% | 2949 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 60,278 psi | 87% | 2933 fps | 100% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 62,149 psi | 89% | 3002 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 59,176 psi | 85% | 2904 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,024 psi | 73% | 2871 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 60,075 psi | 86% | 3009 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 60,481 psi | 87% | 2913 fps | 98.3% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,884 psi | 82% | 2930 fps | 100% |
| Bofors RP3 | <<locked>> | 84% | 60,524 psi | 87% | 2825 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,007 psi | 68% | 2818 fps | 99.1% |
| Bofors RP5ᴾ | <<locked>> | 100% | 62,149 psi | 89% | 3002 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 62,990 psi | 90% | 2881 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,386 psi | 72% | 2828 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 84% | 60,437 psi | 87% | 2848 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 62,091 psi | 89% | 2936 fps | 100% |
| Hodgdon H4350 | <<locked>> | 88% | 61,105 psi | 88% | 2894 fps | 100% |
| Hodgdon H4831 | <<locked>> | 98% | 62,700 psi | 90% | 2946 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 98% | 61,380 psi | 88% | 2930 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 61,264 psi | 88% | 2841 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 62,236 psi | 89% | 2871 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,038 psi | 72% | 2940 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 58,914 psi | 85% | 2933 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,956 psi | 53% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 61,917 psi | 89% | 2828 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 61,003 psi | 88% | 2812 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 59,698 psi | 86% | 2812 fps | 100% |
| IMR 4350 | <<locked>> | 92% | 60,626 psi | 87% | 2867 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 88% | 60,771 psi | 87% | 2854 fps | 100% |
| IMR 4831 | <<locked>> | 92% | 60,423 psi | 87% | 2867 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 60,843 psi | 87% | 2854 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 59,640 psi | 86% | 2871 fps | 99.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 60,104 psi | 86% | 2989 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 36,245 psi | 52% | 2625 fps | 96.5% |
| Lovex S060 | <<locked>> | 82% | 62,033 psi | 89% | 2789 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 61,395 psi | 88% | 2802 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 61,264 psi | 88% | 2844 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 59,205 psi | 85% | 2848 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,069 psi | 75% | 2766 fps | 100% |
| Norma 201 | <<locked>> | 82% | 62,584 psi | 90% | 2808 fps | 100% |
| Norma 203B | <<locked>> | 84% | 62,439 psi | 90% | 2864 fps | 100% |
| Norma 204 | <<locked>> | 92% | 62,062 psi | 89% | 2933 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 36,114 psi | 52% | 2648 fps | 98.6% |
| Norma MRP | <<locked>> | 98% | 62,308 psi | 90% | 3025 fps | 100% |
| Norma URP | <<locked>> | 92% | 62,381 psi | 90% | 2910 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 59,741 psi | 86% | 2844 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 61,163 psi | 88% | 3009 fps | 100% |
| Ramshot Hunter | <<locked>> | 92% | 61,119 psi | 88% | 2927 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,839 psi | 79% | 2884 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 54% | 1768 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 60,089 psi | 86% | 2838 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 62,352 psi | 90% | 2930 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 60,147 psi | 86% | 2904 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 62,903 psi | 90% | 2992 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,430 psi | 72% | 2936 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 45,266 psi | 65% | 2825 fps | 97.7% |
| Rottweil R 902 | <<locked>> | 82% | 59,611 psi | 86% | 2762 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 60,568 psi | 87% | 2822 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 62,308 psi | 90% | 2907 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 96% | 59,770 psi | 86% | 2920 fps | 100% |
| Rottweil R 907 | <<locked>> | 90% | 62,990 psi | 90% | 2881 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 90% | 61,264 psi | 88% | 2844 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 61,395 psi | 88% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 59,205 psi | 85% | 2848 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 62,308 psi | 90% | 2884 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 62,511 psi | 90% | 2844 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 62,917 psi | 90% | 2723 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 60,597 psi | 87% | 2684 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 60,843 psi | 87% | 2802 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 59,292 psi | 85% | 2917 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 62,671 psi | 90% | 2720 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 60,133 psi | 86% | 2815 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 60,379 psi | 87% | 2854 fps | 99.5% |
| Somchem S365 | <<locked>> | 94% | 62,743 psi | 90% | 2907 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 60,292 psi | 87% | 2887 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 60,408 psi | 87% | 2710 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 60,249 psi | 87% | 2726 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 61,598 psi | 88% | 2782 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 60,597 psi | 87% | 2851 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 59,669 psi | 86% | 2864 fps | 100% |
| Vihtavuori N540 | <<locked>> | 84% | 62,062 psi | 89% | 2776 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 59,582 psi | 86% | 2861 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 61,699 psi | 89% | 2927 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 62,149 psi | 89% | 3028 fps | 99.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,664 psi | 77% | 2894 fps | 99.4% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 46,644 psi | 67% | 2835 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 60,205 psi | 86% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 62,279 psi | 89% | 2940 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,304 psi | 81% | 2995 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 60,626 psi | 87% | 2890 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% | 57,957 psi | 83% | 2684 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 54,839 psi | 79% | 2733 fps | 100% |
| Accurate 3100 | <<locked>> | 80% | 31,894 psi | 46% | 2398 fps | 98.2% |
| Accurate 4064 | <<locked>> | 80% | 55,027 psi | 79% | 2700 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 42,989 psi | 62% | 2631 fps | 100% |
| Accurate MAGPRO | 96.9 gr | 84% | 37,275 psi | 54% | 2612 fps | 95.1% |
| ADI APS 450 | <<locked>> | 80% | 58,813 psi | 84% | 2129 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 51,242 psi | 74% | 2694 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 35,984 psi | 52% | 2516 fps | 96.9% |
| ADI AR 2213 | <<locked>> | 84% | 36,724 psi | 53% | 2566 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 92% | 35,259 psi | 51% | 2523 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 88% | 27,775 psi | 40% | 2382 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 58,291 psi | 84% | 2917 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 36,303 psi | 52% | 2523 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,243 psi | 75% | 2713 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 55,622 psi | 80% | 2782 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,365 psi | 59% | 2641 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,456 psi | 68% | 2749 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 35,969 psi | 52% | 2516 fps | 97% |
| Alliant Reloder-22 | <<locked>> | 80% | 31,879 psi | 46% | 2464 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,618 psi | 44% | 2428 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 26,818 psi | 39% | 2346 fps | 97% |
| Alliant Reloder-26 | 93.3 gr | 80% | 33,098 psi | 48% | 2562 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 47,355 psi | 68% | 2703 fps | 95.7% |
| Bofors RP15 | <<locked>> | 82% | 31,705 psi | 46% | 2457 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 53,084 psi | 76% | 2730 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 33,736 psi | 48% | 2546 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 31,879 psi | 46% | 2464 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 46,108 psi | 66% | 2635 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 88% | 33,649 psi | 48% | 2487 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 53,127 psi | 76% | 2753 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,730 psi | 64% | 2680 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 47,427 psi | 68% | 2694 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 82% | 36,550 psi | 53% | 2510 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 84% | 38,493 psi | 55% | 2552 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,928 psi | 56% | 2526 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 58,189 psi | 84% | 2825 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 29,820 psi | 43% | 2474 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 43,888 psi | 63% | 2707 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,688 psi | 40% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 58,102 psi | 83% | 2782 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,940 psi | 77% | 2720 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 56,086 psi | 81% | 2762 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,582 psi | 60% | 2572 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,543 psi | 68% | 2657 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 41,089 psi | 59% | 2585 fps | 100% |
| IMR 4895 | <<locked>> | 80% | 57,058 psi | 82% | 2808 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 36,100 psi | 52% | 2461 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 84% | 35,259 psi | 51% | 2543 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 98% | 33,939 psi | 49% | 2569 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 58,436 psi | 84% | 2743 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 54,375 psi | 78% | 2713 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 45,034 psi | 65% | 2612 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 43,410 psi | 62% | 2605 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 27,514 psi | 40% | 2287 fps | 96.7% |
| Norma 201 | <<locked>> | 80% | 58,769 psi | 84% | 2762 fps | 100% |
| Norma 203B | <<locked>> | 80% | 54,998 psi | 79% | 2769 fps | 100% |
| Norma 204 | <<locked>> | 80% | 41,481 psi | 60% | 2612 fps | 98.2% |
| Norma 217 | <<locked>> | 92% | 27,934 psi | 40% | 2425 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 33,170 psi | 48% | 2526 fps | 97.7% |
| Norma URP | <<locked>> | 80% | 42,395 psi | 61% | 2625 fps | 100% |
| Ramshot Big Game | <<locked>> | 80% | 55,883 psi | 80% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 34,577 psi | 50% | 2539 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 41,220 psi | 59% | 2621 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 28,689 psi | 41% | 2372 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,195 psi | 41% | 1581 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,837 psi | 76% | 2740 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,386 psi | 72% | 2785 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,844 psi | 62% | 2654 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,162 psi | 59% | 2674 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 28,776 psi | 41% | 2448 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 36,492 psi | 52% | 2641 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 56,057 psi | 81% | 2720 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 50,024 psi | 72% | 2684 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 37,449 psi | 54% | 2497 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 80% | 35,244 psi | 51% | 2503 fps | 97% |
| Rottweil R 907 | <<locked>> | 80% | 46,108 psi | 66% | 2635 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,034 psi | 65% | 2612 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 54,375 psi | 78% | 2713 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,410 psi | 62% | 2605 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,300 psi | 74% | 2740 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 58,740 psi | 84% | 2799 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 59,117 psi | 85% | 2677 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,401 psi | 72% | 2559 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,077 psi | 63% | 2559 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 34,925 psi | 50% | 2497 fps | 96.9% |
| Somchem S335 | <<locked>> | 80% | 58,900 psi | 85% | 2677 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 49,908 psi | 72% | 2680 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 38,014 psi | 55% | 2487 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 39,044 psi | 56% | 2579 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,853 psi | 52% | 2487 fps | 97.9% |
| Vihtavuori N135 | <<locked>> | 80% | 56,739 psi | 82% | 2667 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 56,710 psi | 81% | 2687 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 47,790 psi | 69% | 2605 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,743 psi | 63% | 2612 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 30,908 psi | 44% | 2365 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 54,824 psi | 79% | 2690 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 43,134 psi | 62% | 2621 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 34,301 psi | 49% | 2500 fps | 99.9% |
| Vihtavuori N560 | 92.9 gr | 82% | 35,969 psi | 52% | 2575 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 88% | 35,665 psi | 51% | 2566 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 96% | 40,712 psi | 58% | 2717 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,656 psi | 61% | 2575 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,860 psi | 64% | 2684 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,195 psi | 39% | 2454 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 32,590 psi | 47% | 2411 fps | 95.9% |
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 106 powders for 37 XC loaded with the .375 | 300gr | Rhino Solid. Vihtavuori N560 delivers the highest muzzle velocity at 3,028 fps; across all powders the maximum-charge window runs from 1,729 fps to 3,028 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 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 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, ADI AR 2217 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. Alliant Reloder-26, Vihtavuori N560, Accurate MAGPRO rank at the top here: for 37 XC with the .375 | 300gr | Rhino 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.