Load Specifications
Load data in caliber .255 GS with .257 | 72gr | Reichenberg Spezial Jagd bullet and 82 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, ReloadSwiss RS 60 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 54,708 psi | 86% | 3497 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 57,290 psi | 90% | 3576 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 56,550 psi | 89% | 3563 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,303 psi | 87% | 3576 fps | 99.9% |
| Accurate 4064 | <<locked>> | 96% | 56,086 psi | 88% | 3602 fps | 100% |
| Accurate LT-30 | <<locked>> | 84% | 57,566 psi | 90% | 3501 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,592 psi | 86% | 3468 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 92% | 57,682 psi | 90% | 3642 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 96% | 55,085 psi | 86% | 3566 fps | 97.7% |
| ADI AR 2219 | <<locked>> | 82% | 55,085 psi | 86% | 3573 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 57,000 psi | 89% | 3599 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 90% | 56,782 psi | 89% | 3593 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 54,694 psi | 86% | 3665 fps | 98.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 53,824 psi | 84% | 3681 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 54,650 psi | 86% | 3589 fps | 99% |
| Alliant Reloder-10x | <<locked>> | 84% | 54,360 psi | 85% | 3517 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,593 psi | 87% | 3619 fps | 98% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 56,072 psi | 88% | 3714 fps | 99.1% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 57,435 psi | 90% | 3478 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 54,230 psi | 85% | 3576 fps | 97.2% |
| Bofors RP3 | <<locked>> | 96% | 55,390 psi | 87% | 3609 fps | 99.1% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,492 psi | 87% | 3527 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 90% | 56,347 psi | 88% | 3622 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 86% | 54,244 psi | 85% | 3661 fps | 97.7% |
| Hodgdon H322 | <<locked>> | 86% | 57,551 psi | 90% | 3615 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,114 psi | 86% | 3570 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 57,058 psi | 89% | 3619 fps | 97% |
| Hodgdon H4895 | <<locked>> | 90% | 54,839 psi | 86% | 3599 fps | 98.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,801 psi | 69% | 3369 fps | 96.4% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 57,508 psi | 90% | 3681 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,592 psi | 54% | 2290 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,318 psi | 88% | 3602 fps | 98.9% |
| IMR 3031 | <<locked>> | 92% | 57,566 psi | 90% | 3661 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 54,592 psi | 86% | 3550 fps | 97.8% |
| IMR 4198 | <<locked>> | 84% | 54,389 psi | 85% | 3481 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 56,971 psi | 89% | 3661 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 90% | 57,000 psi | 89% | 3599 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 86% | 57,566 psi | 90% | 3583 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 92% | 57,290 psi | 90% | 3619 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 57,609 psi | 90% | 3563 fps | 98.7% |
| Lovex S062 | <<locked>> | 94% | 54,128 psi | 85% | 3550 fps | 99.1% |
| Norma 200 | <<locked>> | 82% | 57,653 psi | 90% | 3543 fps | 100% |
| Norma 201 | <<locked>> | 92% | 56,478 psi | 89% | 3586 fps | 99.3% |
| Norma 202 | <<locked>> | 92% | 56,724 psi | 89% | 3596 fps | 100% |
| Norma 203B | <<locked>> | 94% | 54,752 psi | 86% | 3602 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 94% | 55,608 psi | 87% | 3629 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 90% | 56,913 psi | 89% | 3619 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 86% | 54,708 psi | 86% | 3524 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,751 psi | 54% | 2339 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 56,405 psi | 88% | 3586 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 55,535 psi | 87% | 3691 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 55,854 psi | 88% | 3734 fps | 100% |
| Rottweil R 901 | <<locked>> | 90% | 57,261 psi | 90% | 3583 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 56,768 psi | 89% | 3576 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 98% | 54,882 psi | 86% | 3589 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 92% | 57,290 psi | 90% | 3619 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,128 psi | 85% | 3550 fps | 99.1% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 56,536 psi | 89% | 3543 fps | 99.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 57,232 psi | 90% | 3225 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 55,709 psi | 87% | 3579 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 57,217 psi | 90% | 3661 fps | 98.6% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,201 psi | 87% | 3543 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 55,796 psi | 87% | 3560 fps | 96.6% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 56,231 psi | 88% | 3599 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,578 psi | 86% | 3474 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 54,839 psi | 86% | 3465 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 54,752 psi | 86% | 3566 fps | 99.3% |
| Somchem S335 | <<locked>> | 92% | 57,595 psi | 90% | 3527 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 55,361 psi | 87% | 3556 fps | 98.3% |
| Somchem S355 | <<locked>> | 98% | 55,579 psi | 87% | 3593 fps | 98.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,105 psi | 68% | 3428 fps | 97.7% |
| Vihtavuori N130 | <<locked>> | 88% | 57,696 psi | 90% | 3504 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,520 psi | 85% | 3461 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 55,927 psi | 88% | 3556 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 57,290 psi | 90% | 3563 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 57,479 psi | 90% | 3579 fps | 99.7% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,053 psi | 80% | 3510 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 90% | 57,711 psi | 90% | 3599 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 94% | 55,927 psi | 88% | 3556 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,417 psi | 82% | 3491 fps | 98.6% |
| Winchester 748 | <<locked>> | 90% | 57,159 psi | 90% | 3648 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 92% | 56,231 psi | 88% | 3609 fps | 99% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 42,569 psi | 67% | 3264 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,702 psi | 73% | 3379 fps | 99.4% |
| Accurate 2495 | <<locked>> | 80% | 35,114 psi | 55% | 3127 fps | 99.4% |
| Accurate 2520 | <<locked>> | 80% | 41,626 psi | 65% | 3297 fps | 98.2% |
| Accurate 4064 | <<locked>> | 80% | 33,170 psi | 52% | 3091 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 80% | 50,705 psi | 79% | 3379 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,010 psi | 80% | 3402 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 82% | 41,814 psi | 66% | 3304 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 90% | 45,658 psi | 72% | 3369 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 51,387 psi | 81% | 3507 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,075 psi | 64% | 3264 fps | 96.4% |
| Alliant AR-Comp | <<locked>> | 80% | 40,074 psi | 63% | 3291 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,543 psi | 75% | 3514 fps | 97.3% |
| Alliant Power Pro 2000-MR | 49.9 gr | 88% | 46,688 psi | 73% | 3524 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 39,595 psi | 62% | 3264 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,950 psi | 75% | 3402 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 45,672 psi | 72% | 3412 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 42,351 psi | 66% | 3412 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,357 psi | 79% | 3360 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 47,166 psi | 74% | 3432 fps | 95.5% |
| Bofors RP3 | <<locked>> | 86% | 39,146 psi | 61% | 3258 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,207 psi | 68% | 3274 fps | 97.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,581 psi | 62% | 3268 fps | 96.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,511 psi | 68% | 3425 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 47,007 psi | 74% | 3422 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 80% | 47,877 psi | 75% | 3435 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 92% | 49,748 psi | 78% | 3478 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 39,378 psi | 62% | 3251 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 41,089 psi | 64% | 3304 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 37,913 psi | 59% | 3255 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,628 psi | 40% | 2057 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 40,408 psi | 63% | 3258 fps | 95.3% |
| IMR 3031 | <<locked>> | 80% | 38,305 psi | 60% | 3274 fps | 99.3% |
| IMR 4064 | <<locked>> | 88% | 45,092 psi | 71% | 3353 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 48,254 psi | 76% | 3373 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 41,060 psi | 64% | 3317 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 41,075 psi | 64% | 3264 fps | 96.4% |
| Lovex D073.5 | <<locked>> | 80% | 46,383 psi | 73% | 3373 fps | 98.5% |
| Lovex D073.6 | <<locked>> | 80% | 37,623 psi | 59% | 3209 fps | 97.2% |
| Lovex S060 | <<locked>> | 82% | 42,279 psi | 66% | 3248 fps | 95.4% |
| Lovex S062 | <<locked>> | 82% | 36,883 psi | 58% | 3163 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 54,244 psi | 85% | 3484 fps | 100% |
| Norma 201 | <<locked>> | 80% | 38,334 psi | 60% | 3189 fps | 95.6% |
| Norma 202 | <<locked>> | 80% | 38,348 psi | 60% | 3212 fps | 98% |
| Norma 203B | <<locked>> | 86% | 41,974 psi | 66% | 3327 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 86% | 41,901 psi | 66% | 3337 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 82% | 43,381 psi | 68% | 3343 fps | 95.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,802 psi | 70% | 3320 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,614 psi | 40% | 2096 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,398 psi | 73% | 3389 fps | 98.8% |
| ReloadSwiss RS 52 | 47.3 gr | 86% | 44,773 psi | 70% | 3468 fps | 95.4% |
| ReloadSwiss RS 60 | 46.9 gr | 84% | 34,345 psi | 54% | 3196 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 42,061 psi | 66% | 3278 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 82% | 38,769 psi | 61% | 3192 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 88% | 39,291 psi | 62% | 3255 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,623 psi | 59% | 3209 fps | 97.2% |
| Shooters World Precision | <<locked>> | 82% | 36,883 psi | 58% | 3163 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,066 psi | 77% | 3402 fps | 98% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 54,201 psi | 85% | 3179 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,837 psi | 81% | 3507 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 43,598 psi | 68% | 3383 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,588 psi | 76% | 3422 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 48,704 psi | 76% | 3422 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 43,149 psi | 68% | 3327 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,842 psi | 62% | 3169 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,779 psi | 51% | 2989 fps | 97.5% |
| Somchem S321 | <<locked>> | 80% | 44,599 psi | 70% | 3363 fps | 97.7% |
| Somchem S335 | <<locked>> | 80% | 39,494 psi | 62% | 3169 fps | 98.9% |
| Somchem S341 | <<locked>> | 82% | 41,785 psi | 65% | 3274 fps | 95.1% |
| Somchem S355 | <<locked>> | 88% | 40,306 psi | 63% | 3268 fps | 95.3% |
| Somchem S365 | <<locked>> | 96% | 37,782 psi | 59% | 3287 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 45,165 psi | 71% | 3284 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,914 psi | 63% | 3179 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 80% | 35,259 psi | 55% | 3133 fps | 99.3% |
| Vihtavuori N140 | <<locked>> | 80% | 36,419 psi | 57% | 3133 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 86% | 35,926 psi | 56% | 3123 fps | 95.5% |
| Vihtavuori N160 | <<locked>> | 98% | 47,572 psi | 75% | 3438 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 41,176 psi | 65% | 3261 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 80% | 35,186 psi | 55% | 3107 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 39,755 psi | 62% | 3209 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 40,205 psi | 63% | 3297 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 82% | 39,784 psi | 62% | 3261 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 82 powders for .255 GS loaded with the .257 | 72gr | Reichenberg Spezial Jagd. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,734 fps; across all powders the maximum-charge window runs from 2,290 fps to 3,734 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 82 of the 82 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. 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, ReloadSwiss RS 60, ReloadSwiss RS 52 rank at the top here: for .255 GS with the .257 | 72gr | Reichenberg Spezial Jagd 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.