Load Specifications
Load data in caliber .375 Hoelderlin with .375 | 270gr | Atomic 29 HP bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Hodgdon CFE223 and ReloadSwiss RS 52.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 49,530 psi | 90% | 2431 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 47,732 psi | 87% | 2448 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 48,298 psi | 88% | 2474 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 48,820 psi | 89% | 2500 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 48,196 psi | 87% | 2510 fps | 100% |
| Accurate LT-30 | <<locked>> | 82% | 47,834 psi | 87% | 2346 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 48,211 psi | 87% | 2362 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 92% | 48,617 psi | 88% | 2500 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 98% | 49,588 psi | 90% | 2493 fps | 98.2% |
| ADI AR 2219 | <<locked>> | 82% | 46,934 psi | 85% | 2448 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 48,312 psi | 88% | 2467 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 90% | 46,775 psi | 85% | 2457 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 49,327 psi | 90% | 2556 fps | 99.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 47,805 psi | 87% | 2582 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 48,008 psi | 87% | 2510 fps | 99.2% |
| Alliant Reloder-10x | <<locked>> | 86% | 49,792 psi | 90% | 2441 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 49,182 psi | 89% | 2530 fps | 98.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 45,426 psi | 82% | 2549 fps | 98.6% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 49,676 psi | 90% | 2392 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 48,022 psi | 87% | 2507 fps | 97.7% |
| Bofors RP3 | <<locked>> | 98% | 47,601 psi | 86% | 2520 fps | 99.3% |
| Hodgdon Benchmark | <<locked>> | 88% | 47,950 psi | 87% | 2418 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 92% | 49,313 psi | 89% | 2533 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 88% | 47,776 psi | 87% | 2562 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 86% | 48,907 psi | 89% | 2474 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 49,661 psi | 90% | 2497 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 49,748 psi | 90% | 2526 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 92% | 48,979 psi | 89% | 2510 fps | 99.1% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 35,824 psi | 65% | 2306 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 47,123 psi | 86% | 2533 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,794 psi | 61% | 1493 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 47,514 psi | 86% | 2470 fps | 98.9% |
| IMR 3031 | <<locked>> | 92% | 47,485 psi | 86% | 2503 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 49,182 psi | 89% | 2480 fps | 98.4% |
| IMR 4198 | <<locked>> | 84% | 48,109 psi | 87% | 2372 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 47,181 psi | 86% | 2513 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 90% | 48,312 psi | 88% | 2467 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 86% | 47,718 psi | 87% | 2454 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 92% | 46,630 psi | 85% | 2480 fps | 99.9% |
| Lovex S060 | <<locked>> | 92% | 49,719 psi | 90% | 2444 fps | 98.8% |
| Lovex S062 | <<locked>> | 96% | 48,080 psi | 87% | 2480 fps | 99.5% |
| Norma 200 | <<locked>> | 82% | 49,487 psi | 90% | 2411 fps | 100% |
| Norma 201 | <<locked>> | 92% | 47,282 psi | 86% | 2454 fps | 99.3% |
| Norma 202 | <<locked>> | 92% | 47,485 psi | 86% | 2464 fps | 100% |
| Norma 203B | <<locked>> | 96% | 48,225 psi | 88% | 2520 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 96% | 48,457 psi | 88% | 2539 fps | 98.5% |
| Ramshot TAC | <<locked>> | 90% | 48,733 psi | 88% | 2470 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 90% | 47,485 psi | 86% | 2490 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 88% | 49,661 psi | 90% | 2467 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,881 psi | 61% | 1529 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 48,080 psi | 87% | 2457 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 48,153 psi | 87% | 2579 fps | 98.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 48,646 psi | 88% | 2615 fps | 100% |
| Rottweil R 901 | <<locked>> | 90% | 48,341 psi | 88% | 2444 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 47,587 psi | 86% | 2448 fps | 99.4% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 47,268 psi | 86% | 2503 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 92% | 46,630 psi | 85% | 2480 fps | 99.9% |
| Shooters World Precision | <<locked>> | 96% | 48,080 psi | 87% | 2480 fps | 99.5% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 48,153 psi | 87% | 2428 fps | 99.1% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 47,355 psi | 86% | 2454 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 49,719 psi | 90% | 2566 fps | 98.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 47,761 psi | 87% | 2415 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 49,559 psi | 90% | 2490 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 47,021 psi | 85% | 2474 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 47,123 psi | 86% | 2375 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 49,110 psi | 89% | 2411 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 48,907 psi | 89% | 2497 fps | 99.6% |
| Somchem S335 | <<locked>> | 92% | 48,762 psi | 88% | 2415 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 49,110 psi | 89% | 2490 fps | 98.6% |
| Somchem S355ᴾ | <<locked>> | 100% | 48,472 psi | 88% | 2510 fps | 99% |
| Somchem S365ᴾ | <<locked>> | 100% | 34,592 psi | 63% | 2349 fps | 97.3% |
| Vihtavuori N130 | <<locked>> | 86% | 47,311 psi | 86% | 2359 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 47,007 psi | 85% | 2372 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 49,197 psi | 89% | 2470 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 47,950 psi | 87% | 2448 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 46,775 psi | 85% | 2454 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 90% | 48,530 psi | 88% | 2464 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 96% | 49,313 psi | 89% | 2487 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 42,902 psi | 78% | 2398 fps | 97.9% |
| Winchester 748 | <<locked>> | 90% | 47,108 psi | 85% | 2503 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 94% | 49,574 psi | 90% | 2530 fps | 99.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 36,158 psi | 66% | 2228 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 38,972 psi | 71% | 2310 fps | 99.5% |
| Accurate 2495 | <<locked>> | 80% | 28,123 psi | 51% | 2129 fps | 99.5% |
| Accurate 2520 | <<locked>> | 80% | 34,301 psi | 62% | 2257 fps | 98.5% |
| Accurate 4064 | <<locked>> | 80% | 26,701 psi | 48% | 2106 fps | 97.3% |
| Accurate LT-30 | <<locked>> | 80% | 45,049 psi | 82% | 2306 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 45,426 psi | 82% | 2323 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 82% | 35,389 psi | 64% | 2264 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 88% | 36,492 psi | 66% | 2270 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 43,859 psi | 80% | 2402 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 35,172 psi | 64% | 2234 fps | 97% |
| Alliant AR-Comp | <<locked>> | 80% | 33,359 psi | 61% | 2247 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 40,263 psi | 73% | 2405 fps | 97.8% |
| Alliant Power Pro 2000-MR | 60.1 gr | 88% | 39,059 psi | 71% | 2418 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 30,603 psi | 56% | 2188 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 41,394 psi | 75% | 2320 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 35,694 psi | 65% | 2293 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 92% | 34,853 psi | 63% | 2339 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 43,598 psi | 79% | 2306 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 39,189 psi | 71% | 2356 fps | 95.5% |
| Bofors RP3 | <<locked>> | 86% | 31,734 psi | 58% | 2231 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 37,420 psi | 68% | 2238 fps | 98.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 32,561 psi | 59% | 2238 fps | 96.9% |
| Hodgdon CFE223 | 55.9 gr | 80% | 36,201 psi | 66% | 2346 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 80% | 39,943 psi | 72% | 2336 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 40,466 psi | 73% | 2356 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 92% | 40,770 psi | 74% | 2382 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 33,315 psi | 60% | 2228 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 33,736 psi | 61% | 2260 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 31,633 psi | 57% | 2234 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,990 psi | 45% | 1332 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 32,285 psi | 59% | 2188 fps | 95.1% |
| IMR 3031 | <<locked>> | 80% | 31,908 psi | 58% | 2238 fps | 99.6% |
| IMR 4064 | <<locked>> | 86% | 35,810 psi | 65% | 2251 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 42,685 psi | 77% | 2293 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 34,142 psi | 62% | 2274 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 35,172 psi | 64% | 2234 fps | 97% |
| Lovex D073.5 | <<locked>> | 80% | 38,551 psi | 70% | 2306 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 80% | 30,835 psi | 56% | 2195 fps | 97.5% |
| Lovex S060 | <<locked>> | 80% | 34,476 psi | 63% | 2175 fps | 95.3% |
| Lovex S062 | <<locked>> | 82% | 30,980 psi | 56% | 2165 fps | 95.7% |
| Norma 200 | <<locked>> | 80% | 46,586 psi | 85% | 2375 fps | 100% |
| Norma 201 | <<locked>> | 80% | 32,401 psi | 59% | 2182 fps | 96.2% |
| Norma 202 | <<locked>> | 80% | 32,401 psi | 59% | 2201 fps | 98.5% |
| Norma 203B | <<locked>> | 86% | 34,998 psi | 64% | 2283 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 86% | 34,606 psi | 63% | 2287 fps | 95% |
| Ramshot TAC | <<locked>> | 88% | 45,803 psi | 83% | 2425 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 33,808 psi | 61% | 2244 fps | 95% |
| Ramshot X-Terminator | <<locked>> | 80% | 38,363 psi | 70% | 2280 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,990 psi | 45% | 1365 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 39,566 psi | 72% | 2320 fps | 99.1% |
| ReloadSwiss RS 52 | 56.9 gr | 86% | 36,709 psi | 67% | 2372 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 28,689 psi | 52% | 2192 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 35,694 psi | 65% | 2231 fps | 99% |
| Rottweil R 902 | <<locked>> | 80% | 30,821 psi | 56% | 2139 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 88% | 31,647 psi | 57% | 2224 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 30,835 psi | 56% | 2195 fps | 97.5% |
| Shooters World Precision | <<locked>> | 82% | 30,980 psi | 56% | 2165 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 41,814 psi | 76% | 2326 fps | 98.2% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 44,179 psi | 80% | 2408 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 36,013 psi | 65% | 2323 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 42,119 psi | 76% | 2333 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 43,004 psi | 78% | 2388 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 33,968 psi | 62% | 2234 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,360 psi | 62% | 2162 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,818 psi | 50% | 2041 fps | 98.1% |
| Somchem S321 | <<locked>> | 80% | 37,260 psi | 68% | 2303 fps | 97.9% |
| Somchem S335 | <<locked>> | 80% | 33,736 psi | 61% | 2169 fps | 99.3% |
| Somchem S341 | <<locked>> | 82% | 34,838 psi | 63% | 2247 fps | 95.3% |
| Somchem S355 | <<locked>> | 88% | 33,141 psi | 60% | 2238 fps | 95.5% |
| Somchem S365 | <<locked>> | 96% | 30,443 psi | 55% | 2247 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 39,218 psi | 71% | 2238 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 34,374 psi | 62% | 2169 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 29,283 psi | 53% | 2139 fps | 99.6% |
| Vihtavuori N140 | <<locked>> | 80% | 30,429 psi | 55% | 2142 fps | 98.3% |
| Vihtavuori N150 | <<locked>> | 86% | 29,631 psi | 54% | 2139 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 34,954 psi | 63% | 2231 fps | 97% |
| Vihtavuori N540 | <<locked>> | 80% | 29,196 psi | 53% | 2129 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 35,273 psi | 64% | 2254 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 33,562 psi | 61% | 2260 fps | 97.5% |
| Winchester StaBALL Match | <<locked>> | 82% | 32,866 psi | 60% | 2234 fps | 95.5% |
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 81 powders for .375 Hoelderlin loaded with the .375 | 270gr | Atomic 29 HP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,615 fps; across all powders the maximum-charge window runs from 1,493 fps to 2,615 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 81 of the 81 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 270.0 gr projectile in 0.375" calls for a 1:17.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-17, Hodgdon Hybrid 100V, Hodgdon TrailBoss 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 Power Pro 2000-MR, Hodgdon CFE223, ReloadSwiss RS 52 rank at the top here: for .375 Hoelderlin with the .375 | 270gr | Atomic 29 HP 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.