Load Specifications
Load data in caliber .25 GT with .257 | 72gr | CutEdge ESP Raptor bullet and 54 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon H322, ADI AR 2219 and Shooters World AR Plus.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 86% | 52,982 psi | 85% | 3199 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 52,663 psi | 85% | 3278 fps | 99.9% |
| Accurate 2460 | <<locked>> | 98% | 55,724 psi | 90% | 3350 fps | 98.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 40,509 psi | 65% | 3123 fps | 98.9% |
| Accurate 2520ᴾ | <<locked>> | 100% | 52,547 psi | 85% | 3337 fps | 98% |
| Accurate 4064ᴾ | <<locked>> | 100% | 37,666 psi | 61% | 3074 fps | 95.9% |
| Accurate LT-30 | <<locked>> | 92% | 53,592 psi | 86% | 3212 fps | 99.4% |
| Accurate LT-32 | <<locked>> | 92% | 54,070 psi | 87% | 3222 fps | 98.1% |
| ADI AR 2207 | <<locked>> | 92% | 56,072 psi | 90% | 3310 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 55,056 psi | 89% | 3376 fps | 99.5% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 52,518 psi | 85% | 3297 fps | 96.2% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 49,066 psi | 79% | 3314 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 96% | 53,722 psi | 87% | 3323 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 54,592 psi | 88% | 3271 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 55,608 psi | 90% | 3248 fps | 99.7% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 55,535 psi | 90% | 3301 fps | 97.4% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 49,966 psi | 81% | 3310 fps | 96.4% |
| Hodgdon H322 | <<locked>> | 96% | 52,953 psi | 85% | 3343 fps | 99.3% |
| Hodgdon H335 | <<locked>> | 96% | 54,824 psi | 88% | 3366 fps | 98.9% |
| Hodgdon H4198 | <<locked>> | 90% | 55,593 psi | 90% | 3268 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,778 psi | 51% | 2021 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 46,659 psi | 75% | 3294 fps | 99.1% |
| IMR 4198 | <<locked>> | 96% | 55,172 psi | 89% | 3301 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 55,564 psi | 90% | 3235 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 52,518 psi | 85% | 3297 fps | 96.2% |
| Lovex D073.4 | <<locked>> | 90% | 52,678 psi | 85% | 3314 fps | 97.8% |
| Lovex D073.5 | <<locked>> | 96% | 52,011 psi | 84% | 3284 fps | 97.1% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 46,296 psi | 75% | 3235 fps | 96.8% |
| Lovex S053 | <<locked>> | 86% | 53,606 psi | 86% | 3166 fps | 100% |
| Norma 200 | <<locked>> | 92% | 53,258 psi | 86% | 3294 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 47,529 psi | 77% | 3235 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,850 psi | 51% | 2073 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 55,245 psi | 89% | 3264 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 52,576 psi | 85% | 3304 fps | 97.7% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 51,387 psi | 83% | 3278 fps | 98.2% |
| Shooters World AR Plus | <<locked>> | 90% | 52,678 psi | 85% | 3314 fps | 97.8% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 46,296 psi | 75% | 3235 fps | 96.8% |
| Shooters World Tactical Rifle | <<locked>> | 94% | 53,882 psi | 87% | 3268 fps | 96% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 53,983 psi | 87% | 2995 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 55,666 psi | 90% | 3376 fps | 98.9% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 54,694 psi | 88% | 3333 fps | 99.8% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 51,517 psi | 83% | 3205 fps | 98.2% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 41,133 psi | 66% | 3018 fps | 97.3% |
| Somchem S321 | <<locked>> | 98% | 53,925 psi | 87% | 3343 fps | 96.9% |
| Somchem S335ᴾ | <<locked>> | 100% | 49,385 psi | 80% | 3189 fps | 98.7% |
| Vihtavuori N110 | <<locked>> | 82% | 55,622 psi | 90% | 3107 fps | 100% |
| Vihtavuori N120 | <<locked>> | 92% | 56,086 psi | 90% | 3251 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 54,302 psi | 88% | 3261 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 50,589 psi | 82% | 3209 fps | 99.7% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 42,293 psi | 68% | 3150 fps | 99.1% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 45,049 psi | 73% | 3156 fps | 97.6% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 53,461 psi | 86% | 3304 fps | 96.4% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 43,758 psi | 71% | 3143 fps | 96.8% |
| Winchester 748ᴾ | <<locked>> | 100% | 50,937 psi | 82% | 3333 fps | 96.9% |
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 1680 | <<locked>> | 80% | 42,888 psi | 69% | 3018 fps | 99.5% |
| Accurate 2015 | <<locked>> | 82% | 29,515 psi | 48% | 2772 fps | 95.2% |
| Accurate 2460 | <<locked>> | 88% | 39,146 psi | 63% | 3035 fps | 95.3% |
| Accurate 2495 | <<locked>> | 90% | 28,529 psi | 46% | 2818 fps | 95.4% |
| Accurate 2520 | <<locked>> | 94% | 42,308 psi | 68% | 3143 fps | 95.8% |
| Accurate 4064 | <<locked>> | 98% | 35,114 psi | 57% | 3009 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 36,767 psi | 59% | 2874 fps | 96.2% |
| Accurate LT-32 | <<locked>> | 84% | 41,887 psi | 68% | 2989 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 38,551 psi | 62% | 2999 fps | 100% |
| ADI AR 2219 | 30 gr | 82% | 36,506 psi | 59% | 2999 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 98% | 49,284 psi | 79% | 3235 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 25,396 psi | 41% | 2713 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 31,981 psi | 52% | 2864 fps | 97.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 39,813 psi | 64% | 2995 fps | 99.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 35,085 psi | 57% | 2844 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 94% | 46,499 psi | 75% | 3133 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 98% | 46,325 psi | 75% | 3241 fps | 95.6% |
| Hodgdon H322 | 29.7 gr | 84% | 35,491 psi | 57% | 2969 fps | 95.5% |
| Hodgdon H335 | <<locked>> | 86% | 38,508 psi | 62% | 3041 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 40,640 psi | 66% | 2982 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,206 psi | 37% | 1808 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 33,678 psi | 54% | 2986 fps | 95.8% |
| IMR 4198 | <<locked>> | 80% | 34,026 psi | 55% | 2874 fps | 98.7% |
| IMR 4227 | <<locked>> | 80% | 45,890 psi | 74% | 3074 fps | 100% |
| IMR 8208 XBR | <<locked>> | 98% | 49,284 psi | 79% | 3235 fps | 95.4% |
| Lovex D073.4 | <<locked>> | 84% | 42,511 psi | 69% | 3117 fps | 95.5% |
| Lovex D073.5 | <<locked>> | 92% | 45,020 psi | 73% | 3153 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 96% | 39,914 psi | 64% | 3100 fps | 95.1% |
| Lovex S053 | <<locked>> | 80% | 44,904 psi | 72% | 3025 fps | 100% |
| Norma 200 | <<locked>> | 80% | 36,172 psi | 58% | 2956 fps | 99% |
| Norma 202 | <<locked>> | 94% | 38,972 psi | 63% | 3054 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,076 psi | 37% | 1850 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 45,542 psi | 73% | 3104 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 43,308 psi | 70% | 3123 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 92% | 40,074 psi | 65% | 3048 fps | 95.6% |
| Shooters World AR Plus | 31.9 gr | 84% | 42,511 psi | 69% | 3117 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 96% | 39,914 psi | 64% | 3100 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 50,401 psi | 81% | 3205 fps | 95.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 41,205 psi | 66% | 2795 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 39,653 psi | 64% | 3061 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 32,779 psi | 53% | 2871 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 39,769 psi | 64% | 2972 fps | 95.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 33,997 psi | 55% | 2848 fps | 95% |
| Somchem S321 | <<locked>> | 94% | 46,920 psi | 76% | 3215 fps | 95.3% |
| Somchem S335 | <<locked>> | 90% | 36,230 psi | 58% | 2913 fps | 95.7% |
| Vihtavuori N110 | <<locked>> | 80% | 51,982 psi | 84% | 3054 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 38,711 psi | 62% | 2959 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 30,922 psi | 50% | 2769 fps | 96.7% |
| Vihtavuori N133 | <<locked>> | 84% | 30,385 psi | 49% | 2762 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 90% | 30,298 psi | 49% | 2848 fps | 95.8% |
| Vihtavuori N140 | <<locked>> | 94% | 37,028 psi | 60% | 2979 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 98% | 50,024 psi | 81% | 3241 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 96% | 38,072 psi | 61% | 3015 fps | 95.1% |
| Winchester 748 | <<locked>> | 96% | 44,715 psi | 72% | 3209 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 .25 GT loaded with the .257 | 72gr | CutEdge ESP Raptor. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 3,412 fps; across all powders the maximum-charge window runs from 2,021 fps to 3,412 fps. Accurate 2015 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 (427 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 72.0 gr projectile in 0.257" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2495, Accurate 2520 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. Hodgdon H322, ADI AR 2219, Shooters World AR Plus rank at the top here: for .25 GT with the .257 | 72gr | CutEdge ESP Raptor they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2200, Accurate 2230, ADI AR 2206H 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.