Load Specifications
Bullet:.375 | 220gr | Impala CFN
Bullet Manufacturer:Impala Bullets
Bullet Weight:220 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:37XC 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 37XC with .375 | 220gr | Impala CFN bullet and 116 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-16.
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>> | 84% | 61,119 psi | 88% | 3159 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 60,858 psi | 87% | 3225 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,927 psi | 80% | 3225 fps | 99.8% |
| Accurate 4064 | <<locked>> | 86% | 61,119 psi | 88% | 3219 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 61,815 psi | 89% | 3340 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 57,305 psi | 82% | 3373 fps | 96.9% |
| ADI APS 450 | <<locked>> | 84% | 62,468 psi | 90% | 2546 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 62,308 psi | 90% | 3297 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 59,466 psi | 85% | 3245 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 61,743 psi | 89% | 3376 fps | 99.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,738 psi | 80% | 3310 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 60,626 psi | 87% | 3232 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 59,074 psi | 85% | 3389 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 60,901 psi | 87% | 3271 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 61,105 psi | 88% | 3301 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 61,148 psi | 88% | 3389 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 59,016 psi | 85% | 3363 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 60,858 psi | 87% | 3363 fps | 99.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,795 psi | 79% | 3317 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,808 psi | 74% | 3241 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,498 psi | 65% | 3169 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 59,799 psi | 86% | 3455 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 62,526 psi | 90% | 3317 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,256 psi | 72% | 3232 fps | 97.8% |
| Bofors RP3 | <<locked>> | 88% | 62,453 psi | 90% | 3294 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,795 psi | 79% | 3317 fps | 98.6% |
| Bofors RP7 | <<locked>> | 92% | 61,163 psi | 88% | 3278 fps | 99.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 61,612 psi | 89% | 3202 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 61,424 psi | 88% | 3274 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 62,569 psi | 90% | 3314 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 59,248 psi | 85% | 3330 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 92% | 62,439 psi | 90% | 3337 fps | 99.4% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 59,553 psi | 86% | 3307 fps | 97.4% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 58,421 psi | 84% | 3291 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 82% | 59,321 psi | 85% | 3255 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 61,786 psi | 89% | 3291 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 59,683 psi | 86% | 3291 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,512 psi | 64% | 3202 fps | 97.2% |
| Hodgdon Superformance | <<locked>> | 92% | 59,785 psi | 86% | 3373 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,666 psi | 53% | 2024 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 60,118 psi | 86% | 3251 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 60,118 psi | 86% | 3225 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 62,700 psi | 90% | 3278 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 61,902 psi | 89% | 3264 fps | 99.8% |
| IMR 4350 | <<locked>> | 96% | 61,888 psi | 89% | 3304 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 62,410 psi | 90% | 3301 fps | 99.8% |
| IMR 4831 | <<locked>> | 96% | 61,380 psi | 88% | 3317 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 62,627 psi | 90% | 3330 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 60,959 psi | 88% | 3294 fps | 97.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,171 psi | 76% | 3281 fps | 97% |
| IMR 8208 XBR | <<locked>> | 82% | 60,626 psi | 87% | 3232 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 59,857 psi | 86% | 3215 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 60,408 psi | 87% | 3205 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 59,770 psi | 86% | 3222 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 62,975 psi | 90% | 3294 fps | 100% |
| Lovex S070 | <<locked>> | 94% | 60,916 psi | 88% | 3291 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,847 psi | 67% | 3074 fps | 99% |
| Norma 201 | <<locked>> | 84% | 61,308 psi | 88% | 3235 fps | 100% |
| Norma 202 | <<locked>> | 84% | 61,772 psi | 89% | 3225 fps | 100% |
| Norma 203B | <<locked>> | 86% | 60,379 psi | 87% | 3284 fps | 100% |
| Norma 204 | <<locked>> | 94% | 59,205 psi | 85% | 3310 fps | 98.8% |
| Norma MRPᴾ | <<locked>> | 100% | 58,102 psi | 83% | 3406 fps | 99.8% |
| Norma URP | <<locked>> | 94% | 59,480 psi | 85% | 3317 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 61,322 psi | 88% | 3307 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,505 psi | 77% | 3291 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 96% | 61,975 psi | 89% | 3373 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,269 psi | 69% | 3163 fps | 98.1% |
| Ramshot TAC | <<locked>> | 82% | 60,974 psi | 88% | 3268 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 61,250 psi | 88% | 3281 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,333 psi | 54% | 2070 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 62,192 psi | 89% | 3291 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 62,468 psi | 90% | 3379 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 62,584 psi | 90% | 3406 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 61,206 psi | 88% | 3360 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 59,146 psi | 85% | 3386 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,773 psi | 64% | 3196 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 82% | 62,265 psi | 89% | 3205 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 61,888 psi | 89% | 3232 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 62,482 psi | 90% | 3287 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 59,669 psi | 86% | 3281 fps | 98.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 60,379 psi | 87% | 3350 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 92% | 61,163 psi | 88% | 3278 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 62,975 psi | 90% | 3294 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 59,857 psi | 86% | 3215 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 59,770 psi | 86% | 3222 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 60,916 psi | 88% | 3291 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 59,683 psi | 86% | 3294 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 60,437 psi | 87% | 3251 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 60,698 psi | 87% | 3264 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 61,569 psi | 88% | 3146 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 62,482 psi | 90% | 3140 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 59,335 psi | 85% | 3192 fps | 99.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 59,857 psi | 86% | 3346 fps | 99.1% |
| Somchem S335 | <<locked>> | 84% | 61,453 psi | 88% | 3143 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 59,640 psi | 86% | 3225 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 61,975 psi | 89% | 3281 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 62,047 psi | 89% | 3268 fps | 97.7% |
| Somchem S365 | <<locked>> | 98% | 62,787 psi | 90% | 3363 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 61,453 psi | 88% | 3320 fps | 99.6% |
| Vihtavuori N133 | <<locked>> | 84% | 61,844 psi | 89% | 3117 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 62,149 psi | 89% | 3176 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 62,207 psi | 89% | 3192 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 59,596 psi | 86% | 3192 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 61,699 psi | 89% | 3301 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,142 psi | 76% | 3173 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 82% | 61,293 psi | 88% | 3232 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 60,655 psi | 87% | 3199 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 60,887 psi | 87% | 3314 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 58,117 psi | 83% | 3327 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 58,262 psi | 84% | 3389 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 61,438 psi | 88% | 3255 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 62,265 psi | 89% | 3284 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 59,364 psi | 85% | 3333 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,369 psi | 68% | 3317 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 61,177 psi | 88% | 3274 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,522 psi | 83% | 3251 fps | 98.7% |
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% | 54,070 psi | 78% | 3064 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,430 psi | 72% | 3054 fps | 98.1% |
| Accurate 3100 | <<locked>> | 84% | 33,547 psi | 48% | 2779 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 51,097 psi | 73% | 3074 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,233 psi | 56% | 2946 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 96% | 50,009 psi | 72% | 3245 fps | 95.3% |
| ADI APS 450 | <<locked>> | 80% | 58,436 psi | 84% | 2487 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 55,245 psi | 79% | 3192 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 46,905 psi | 67% | 3035 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,409 psi | 61% | 3022 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 96% | 48,979 psi | 70% | 3182 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 57,116 psi | 82% | 3182 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,605 psi | 74% | 3268 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,776 psi | 69% | 3068 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,908 psi | 73% | 3140 fps | 100% |
| Alliant Reloder-16 | 90.1 gr | 80% | 37,420 psi | 54% | 2940 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,264 psi | 61% | 3074 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,047 psi | 60% | 3018 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,972 psi | 57% | 3015 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,340 psi | 41% | 2700 fps | 97.2% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,865 psi | 46% | 2815 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 30,269 psi | 43% | 2818 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 54,926 psi | 79% | 3205 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 41,916 psi | 60% | 3058 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 48,675 psi | 70% | 3084 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,972 psi | 57% | 3015 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 42,627 psi | 61% | 2940 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 58,044 psi | 83% | 3153 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 57,566 psi | 83% | 3219 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 48,689 psi | 70% | 3091 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,422 psi | 58% | 2979 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 43,134 psi | 62% | 2992 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 48,921 psi | 70% | 3127 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,008 psi | 69% | 3107 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 55,898 psi | 80% | 3202 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,186 psi | 51% | 2828 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,504 psi | 75% | 3186 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,494 psi | 57% | 3071 fps | 95.2% |
| Hodgdon Superformance | 102.6 gr | 80% | 39,450 psi | 57% | 2986 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 40% | 1814 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,200 psi | 76% | 3146 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 56,420 psi | 81% | 3173 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,342 psi | 71% | 3068 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,576 psi | 74% | 3097 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 38,232 psi | 55% | 2861 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,700 psi | 63% | 2969 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 37,449 psi | 54% | 2887 fps | 98.5% |
| IMR 4895 | <<locked>> | 80% | 52,228 psi | 75% | 3169 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,906 psi | 69% | 3068 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 96% | 46,862 psi | 67% | 3156 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 57,116 psi | 82% | 3182 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 56,115 psi | 81% | 3163 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 53,708 psi | 77% | 3104 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,024 psi | 72% | 3071 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,684 psi | 60% | 2923 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 40,147 psi | 58% | 2910 fps | 96.9% |
| Lovex S071 | <<locked>> | 88% | 32,735 psi | 47% | 2759 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 54,375 psi | 78% | 3133 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,679 psi | 79% | 3127 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,386 psi | 72% | 3127 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,815 psi | 62% | 3009 fps | 95.5% |
| Norma MRP | <<locked>> | 86% | 36,767 psi | 53% | 2969 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 38,464 psi | 55% | 2930 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 50,415 psi | 72% | 3143 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 46,702 psi | 67% | 3159 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 37,275 psi | 54% | 2913 fps | 96.8% |
| Ramshot Magnum | <<locked>> | 94% | 39,392 psi | 57% | 2972 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 57,174 psi | 82% | 3212 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 80% | 57,421 psi | 82% | 3225 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,065 psi | 40% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,486 psi | 70% | 3068 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 54,766 psi | 79% | 3264 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,773 psi | 64% | 3130 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,537 psi | 55% | 2956 fps | 98.5% |
| ReloadSwiss RS 70 | 98.6 gr | 80% | 37,275 psi | 54% | 2959 fps | 97.9% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,753 psi | 53% | 2989 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 58,842 psi | 85% | 3159 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 51,938 psi | 75% | 3084 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,963 psi | 66% | 3028 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,702 psi | 67% | 3054 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 88% | 41,147 psi | 59% | 2999 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 42,627 psi | 61% | 2940 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,684 psi | 60% | 2923 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 56,115 psi | 81% | 3163 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 50,024 psi | 72% | 3071 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,147 psi | 58% | 2910 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,369 psi | 67% | 3077 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 56,536 psi | 81% | 3192 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,621 psi | 77% | 3159 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,636 psi | 78% | 3051 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,441 psi | 67% | 2910 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,002 psi | 59% | 2861 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,799 psi | 59% | 2992 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 54,650 psi | 79% | 3048 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 55,912 psi | 80% | 3173 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,890 psi | 66% | 3022 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,198 psi | 74% | 3094 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 35,114 psi | 50% | 2890 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 37,246 psi | 54% | 2871 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 54,984 psi | 79% | 3028 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,967 psi | 75% | 3038 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,996 psi | 75% | 3051 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,903 psi | 63% | 2943 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,769 psi | 57% | 2920 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 38,769 psi | 56% | 2894 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 57,682 psi | 83% | 3179 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 50,459 psi | 72% | 3051 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,479 psi | 57% | 2930 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 31,169 psi | 45% | 2782 fps | 97.3% |
| Vihtavuori N560 | <<locked>> | 94% | 48,008 psi | 69% | 3202 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,841 psi | 56% | 2881 fps | 99.9% |
| Winchester 748 | <<locked>> | 80% | 58,465 psi | 84% | 3235 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 40,596 psi | 58% | 2982 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,498 psi | 37% | 2680 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,780 psi | 77% | 3166 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,292 psi | 59% | 2956 fps | 95.3% |
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 125 powders for 37XC loaded with the .375 | 220gr | Impala CFN. Alliant Reloder-26 delivers the highest muzzle velocity at 3,455 fps; across all powders the maximum-charge window runs from 2,024 fps to 3,455 fps. Accurate 3100 gives the best case fill at 100 %, and 125 of the 125 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (480 MPa), the top charges use 47–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-16 rank at the top here: for 37XC with the .375 | 220gr | Impala CFN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.