Load Specifications
Bullet Manufacturer:Peregrine
Bullet Weight:277 gr
Bullet Diameter:0.376"
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 .376 | 277gr | Peregrine Backup (VRG-2) bullet and 110 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 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% | 59,059 psi | 85% | 2831 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 60,611 psi | 87% | 2936 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 59,973 psi | 86% | 2992 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 59,814 psi | 86% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 61,902 psi | 89% | 3031 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 58,827 psi | 85% | 3114 fps | 99.1% |
| ADI APS 450 | <<locked>> | 84% | 62,743 psi | 90% | 2290 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 62,178 psi | 89% | 2982 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 59,669 psi | 86% | 2940 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 62,990 psi | 90% | 3100 fps | 100% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 60,727 psi | 87% | 3114 fps | 99.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 43,932 psi | 63% | 2825 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,696 psi | 56% | 2785 fps | 99.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 60,321 psi | 87% | 3081 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 60,858 psi | 87% | 2959 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 61,017 psi | 88% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 62,787 psi | 90% | 3084 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 60,568 psi | 87% | 3058 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 62,236 psi | 89% | 3087 fps | 100% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 60,031 psi | 86% | 3104 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,898 psi | 82% | 3005 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,037 psi | 70% | 2963 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 62,091 psi | 89% | 3163 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 62,830 psi | 90% | 3012 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 58,958 psi | 85% | 3012 fps | 97.6% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,853 psi | 79% | 3028 fps | 99.8% |
| Bofors RP3 | <<locked>> | 86% | 62,192 psi | 89% | 2979 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,817 psi | 64% | 2897 fps | 98.4% |
| Bofors RP5ᴾ | <<locked>> | 100% | 60,031 psi | 86% | 3104 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 61,046 psi | 88% | 2986 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,399 psi | 70% | 2910 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 86% | 62,381 psi | 90% | 3005 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 60,002 psi | 86% | 3041 fps | 100% |
| Hodgdon H4350 | <<locked>> | 88% | 59,321 psi | 85% | 3002 fps | 100% |
| Hodgdon H4831 | <<locked>> | 98% | 60,756 psi | 87% | 3045 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 59,480 psi | 85% | 3028 fps | 99.3% |
| Hodgdon H4895 | <<locked>> | 82% | 62,961 psi | 90% | 2989 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 59,059 psi | 85% | 2949 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 60,089 psi | 86% | 2979 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,964 psi | 69% | 3025 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 90% | 61,206 psi | 88% | 3091 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,666 psi | 53% | 1814 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 60,205 psi | 86% | 2940 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 62,874 psi | 90% | 2969 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 61,815 psi | 89% | 2969 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 62,555 psi | 90% | 3018 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 90% | 62,671 psi | 90% | 3009 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 62,105 psi | 89% | 3018 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 62,642 psi | 90% | 3012 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 61,569 psi | 88% | 3022 fps | 99.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,928 psi | 83% | 3087 fps | 99.6% |
| Lovex S060 | <<locked>> | 82% | 60,249 psi | 87% | 2897 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 59,437 psi | 85% | 2910 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 59,132 psi | 85% | 2949 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 60,887 psi | 87% | 2999 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,617 psi | 71% | 2851 fps | 100% |
| Norma 201 | <<locked>> | 82% | 60,394 psi | 87% | 2917 fps | 100% |
| Norma 202 | <<locked>> | 82% | 61,540 psi | 88% | 2907 fps | 100% |
| Norma 203B | <<locked>> | 84% | 60,292 psi | 87% | 2972 fps | 100% |
| Norma 204 | <<locked>> | 92% | 60,002 psi | 86% | 3035 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 34,098 psi | 49% | 2707 fps | 97.4% |
| Norma MRP | <<locked>> | 98% | 59,944 psi | 86% | 3127 fps | 100% |
| Norma URP | <<locked>> | 92% | 60,162 psi | 86% | 3015 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 61,859 psi | 89% | 3002 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 58,929 psi | 85% | 3107 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 92% | 58,972 psi | 85% | 3028 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,605 psi | 76% | 2976 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,318 psi | 54% | 1857 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 62,091 psi | 89% | 2992 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 60,075 psi | 86% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 62,047 psi | 89% | 3058 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 60,727 psi | 87% | 3100 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,298 psi | 69% | 3022 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 43,221 psi | 62% | 2897 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 84% | 61,206 psi | 88% | 2917 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 62,236 psi | 89% | 2972 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 60,336 psi | 87% | 3012 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 98% | 61,598 psi | 88% | 3074 fps | 100% |
| Rottweil R 907 | <<locked>> | 90% | 61,046 psi | 88% | 2986 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 90% | 59,132 psi | 85% | 2949 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 59,437 psi | 85% | 2910 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 60,887 psi | 87% | 2999 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 60,249 psi | 87% | 2989 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 60,655 psi | 87% | 2956 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 61,032 psi | 88% | 2831 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 62,569 psi | 90% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 62,903 psi | 90% | 2956 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 61,105 psi | 88% | 3068 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 60,655 psi | 87% | 2828 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 61,786 psi | 89% | 2966 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 62,526 psi | 90% | 3005 fps | 99.4% |
| Somchem S365 | <<locked>> | 94% | 60,234 psi | 87% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 62,192 psi | 89% | 3041 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 61,656 psi | 89% | 2808 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 62,062 psi | 89% | 2861 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 62,192 psi | 89% | 2881 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 59,553 psi | 86% | 2887 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 62,352 psi | 90% | 3002 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,595 psi | 83% | 2963 fps | 100% |
| Vihtavuori N540 | <<locked>> | 84% | 60,263 psi | 87% | 2887 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 61,337 psi | 88% | 3015 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 59,234 psi | 85% | 3031 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 59,901 psi | 86% | 3127 fps | 99.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,227 psi | 74% | 2979 fps | 98.8% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 44,672 psi | 64% | 2910 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 62,511 psi | 90% | 2963 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 60,176 psi | 86% | 3045 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,476 psi | 77% | 3091 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 61,090 psi | 88% | 2963 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 62,801 psi | 90% | 3041 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% | 55,332 psi | 79% | 2785 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 53,127 psi | 76% | 2831 fps | 99.8% |
| Accurate 3100 | <<locked>> | 80% | 29,849 psi | 43% | 2457 fps | 97% |
| Accurate 4064 | <<locked>> | 80% | 52,576 psi | 76% | 2802 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,756 psi | 59% | 2713 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 40,901 psi | 59% | 2805 fps | 95.6% |
| ADI APS 450 | <<locked>> | 80% | 58,653 psi | 84% | 2234 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 58,334 psi | 84% | 2933 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 49,530 psi | 71% | 2795 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 34,432 psi | 49% | 2592 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 86% | 37,565 psi | 54% | 2694 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 96% | 38,377 psi | 55% | 2703 fps | 96% |
| ADI AR 2225 | <<locked>> | 92% | 29,863 psi | 43% | 2546 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 56,101 psi | 81% | 3025 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,343 psi | 72% | 2815 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,751 psi | 77% | 2887 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,494 psi | 57% | 2726 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,339 psi | 65% | 2841 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 34,330 psi | 49% | 2589 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 82% | 32,329 psi | 46% | 2582 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,906 psi | 42% | 2493 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 25,338 psi | 36% | 2395 fps | 95.2% |
| Alliant Reloder-26 | 97.7 gr | 80% | 31,154 psi | 45% | 2621 fps | 98.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 58,624 psi | 84% | 2956 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 48,805 psi | 70% | 2841 fps | 95.4% |
| Bofors RP15 | <<locked>> | 86% | 34,389 psi | 49% | 2635 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 50,894 psi | 73% | 2831 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 34,040 psi | 49% | 2661 fps | 95.1% |
| Bofors RP5 | <<locked>> | 82% | 32,329 psi | 46% | 2582 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 44,367 psi | 64% | 2723 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 34,360 psi | 49% | 2612 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 51,169 psi | 74% | 2851 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,859 psi | 62% | 2769 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 45,687 psi | 66% | 2782 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 40,089 psi | 58% | 2700 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 39,378 psi | 57% | 2684 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 59,030 psi | 85% | 2940 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,028 psi | 53% | 2608 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 56,115 psi | 81% | 2930 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 32,140 psi | 46% | 2648 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 41,989 psi | 60% | 2789 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,325 psi | 39% | 1621 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 56,405 psi | 81% | 2890 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,083 psi | 75% | 2822 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,404 psi | 78% | 2864 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,001 psi | 57% | 2657 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,905 psi | 66% | 2753 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 39,073 psi | 56% | 2664 fps | 99.9% |
| IMR 4895 | <<locked>> | 80% | 55,143 psi | 79% | 2913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 39,421 psi | 57% | 2644 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 88% | 38,377 psi | 55% | 2726 fps | 95.9% |
| Lovex S060 | <<locked>> | 80% | 56,666 psi | 81% | 2851 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 52,344 psi | 75% | 2815 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,236 psi | 62% | 2700 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 41,481 psi | 60% | 2687 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 25,599 psi | 37% | 2336 fps | 95% |
| Norma 201 | <<locked>> | 80% | 56,724 psi | 81% | 2867 fps | 100% |
| Norma 202 | <<locked>> | 80% | 57,682 psi | 83% | 2861 fps | 100% |
| Norma 203B | <<locked>> | 80% | 53,069 psi | 76% | 2874 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,711 psi | 57% | 2690 fps | 97.3% |
| Norma 217 | <<locked>> | 96% | 29,834 psi | 43% | 2585 fps | 95.4% |
| Norma MRP | 94.9 gr | 80% | 31,430 psi | 45% | 2589 fps | 96.4% |
| Norma URP | <<locked>> | 80% | 40,437 psi | 58% | 2707 fps | 100% |
| Ramshot Big Game | <<locked>> | 80% | 53,882 psi | 77% | 2900 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 35,273 psi | 51% | 2667 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 39,378 psi | 57% | 2703 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 31,198 psi | 45% | 2546 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,862 psi | 40% | 1660 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,126 psi | 73% | 2838 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,167 psi | 69% | 2884 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,683 psi | 58% | 2736 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,276 psi | 56% | 2753 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 29,138 psi | 42% | 2556 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 40,045 psi | 58% | 2831 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 54,041 psi | 78% | 2822 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,848 psi | 69% | 2779 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 38,348 psi | 55% | 2631 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 33,402 psi | 48% | 2569 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 44,367 psi | 64% | 2723 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,236 psi | 62% | 2700 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 52,344 psi | 75% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,481 psi | 60% | 2687 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,400 psi | 71% | 2838 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 56,913 psi | 82% | 2907 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 57,450 psi | 83% | 2789 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,805 psi | 70% | 2661 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,351 psi | 61% | 2644 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 33,098 psi | 48% | 2562 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 57,101 psi | 82% | 2785 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 47,950 psi | 69% | 2776 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 38,856 psi | 56% | 2615 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 37,057 psi | 53% | 2661 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 33,968 psi | 49% | 2552 fps | 96.8% |
| Vihtavuori N133 | <<locked>> | 80% | 58,131 psi | 84% | 2766 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 54,781 psi | 79% | 2772 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,810 psi | 79% | 2792 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,890 psi | 66% | 2700 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,887 psi | 60% | 2700 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 31,372 psi | 45% | 2484 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 53,026 psi | 76% | 2792 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,278 psi | 59% | 2707 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 32,242 psi | 46% | 2566 fps | 99.4% |
| Vihtavuori N560 | 102 gr | 86% | 39,334 psi | 56% | 2762 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 90% | 36,056 psi | 52% | 2684 fps | 95% |
| Vihtavuori N568 | <<locked>> | 98% | 41,539 psi | 60% | 2844 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,959 psi | 59% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,975 psi | 62% | 2769 fps | 99.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,512 psi | 37% | 2500 fps | 99.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 57,130 psi | 82% | 2910 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 33,185 psi | 48% | 2533 fps | 95.4% |
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 110 powders for 37 XC loaded with the .376 | 277gr | Peregrine Backup (VRG-2). Alliant Reloder-26 delivers the highest muzzle velocity at 3,163 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,163 fps. Accurate 3100 gives the best case fill at 100 %, and 110 of the 110 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (480 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 277.0 gr projectile in 0.376" calls for a 1:6.0 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, Norma MRP rank at the top here: for 37 XC with the .376 | 277gr | Peregrine Backup (VRG-2) 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.