Load Specifications
Load data in caliber .25 GT with .257 | 90gr | CutEdge ER Raptor bullet and 86 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon CFE223, Alliant Power Pro 1200-R and Winchester 748.
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>> | 82% | 54,041 psi | 87% | 2917 fps | 100% |
| Accurate 2015 | <<locked>> | 94% | 53,447 psi | 86% | 2989 fps | 100% |
| Accurate 2200 | <<locked>> | 86% | 55,027 psi | 89% | 3081 fps | 97.2% |
| Accurate 2230 | <<locked>> | 86% | 55,274 psi | 89% | 3084 fps | 97.6% |
| Accurate 2460 | <<locked>> | 92% | 55,796 psi | 90% | 3058 fps | 99.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 52,156 psi | 84% | 3028 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 53,156 psi | 86% | 3058 fps | 99.7% |
| Accurate 4064ᴾ | <<locked>> | 100% | 48,370 psi | 78% | 3002 fps | 99.8% |
| Accurate LT-30 | <<locked>> | 88% | 55,027 psi | 89% | 2946 fps | 100% |
| Accurate LT-32 | <<locked>> | 88% | 55,477 psi | 89% | 2966 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 96% | 52,750 psi | 85% | 3054 fps | 97.7% |
| ADI AR 2207 | <<locked>> | 86% | 56,043 psi | 90% | 2979 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 50,604 psi | 82% | 2989 fps | 96.4% |
| ADI AR 2219 | <<locked>> | 88% | 54,592 psi | 88% | 3064 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 96% | 55,854 psi | 90% | 3074 fps | 99% |
| Alliant AR-Comp | <<locked>> | 96% | 54,302 psi | 88% | 3071 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 53,055 psi | 86% | 3123 fps | 98.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 52,460 psi | 85% | 3143 fps | 96.4% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 48,515 psi | 78% | 3002 fps | 97.8% |
| Alliant Reloder-10x | <<locked>> | 90% | 53,693 psi | 87% | 3009 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 53,055 psi | 86% | 3081 fps | 97.2% |
| Alliant Reloder-7 | <<locked>> | 84% | 53,795 psi | 87% | 2946 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 54,085 psi | 87% | 2940 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 52,475 psi | 85% | 3058 fps | 96.5% |
| Bofors RP3ᴾ | <<locked>> | 100% | 48,370 psi | 78% | 3009 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 94% | 55,332 psi | 89% | 3018 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 96% | 53,911 psi | 87% | 3094 fps | 99.3% |
| Hodgdon CFE223 | <<locked>> | 92% | 52,199 psi | 84% | 3127 fps | 97.1% |
| Hodgdon H322 | <<locked>> | 90% | 53,113 psi | 86% | 3041 fps | 100% |
| Hodgdon H335 | <<locked>> | 90% | 54,172 psi | 87% | 3061 fps | 99.9% |
| Hodgdon H4198 | <<locked>> | 84% | 54,041 psi | 87% | 2953 fps | 100% |
| Hodgdon H4895 | <<locked>> | 96% | 53,098 psi | 86% | 3068 fps | 98.2% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 54,737 psi | 88% | 3143 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,301 psi | 54% | 1841 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 54,998 psi | 89% | 3074 fps | 98.4% |
| IMR 3031 | <<locked>> | 98% | 54,679 psi | 88% | 3120 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 53,272 psi | 86% | 3028 fps | 97.2% |
| IMR 4198 | <<locked>> | 90% | 54,810 psi | 88% | 2976 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 54,317 psi | 88% | 3117 fps | 98% |
| IMR 8208 XBR | <<locked>> | 96% | 55,854 psi | 90% | 3074 fps | 99% |
| Lovex D073.4 | <<locked>> | 84% | 52,040 psi | 84% | 3012 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 90% | 52,185 psi | 84% | 3005 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 98% | 54,505 psi | 88% | 3087 fps | 99.8% |
| Lovex S053 | <<locked>> | 82% | 55,405 psi | 89% | 2871 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 54,041 psi | 87% | 2995 fps | 97.8% |
| Lovex S062ᴾ | <<locked>> | 100% | 51,663 psi | 83% | 3018 fps | 98.6% |
| Norma 200 | <<locked>> | 86% | 53,432 psi | 86% | 2979 fps | 100% |
| Norma 201 | <<locked>> | 98% | 54,360 psi | 88% | 3051 fps | 98.9% |
| Norma 202 | <<locked>> | 98% | 54,752 psi | 88% | 3071 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 52,054 psi | 84% | 3064 fps | 97.6% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 53,185 psi | 86% | 3094 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 96% | 55,288 psi | 89% | 3097 fps | 98% |
| Ramshot X-Terminator | <<locked>> | 92% | 54,418 psi | 88% | 3025 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,214 psi | 54% | 1880 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 55,927 psi | 90% | 3071 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 98% | 52,823 psi | 85% | 3150 fps | 97.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 46,528 psi | 75% | 3051 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 96% | 55,492 psi | 90% | 3051 fps | 99.9% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 54,549 psi | 88% | 3041 fps | 98.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 44,657 psi | 72% | 2930 fps | 96.8% |
| Shooters World AR Plus | <<locked>> | 84% | 52,040 psi | 84% | 3012 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 98% | 54,505 psi | 88% | 3087 fps | 99.8% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 51,663 psi | 83% | 3018 fps | 98.6% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 52,895 psi | 85% | 2982 fps | 98.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 56,057 psi | 90% | 2710 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 55,332 psi | 89% | 3074 fps | 99.9% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 47,572 psi | 77% | 3005 fps | 96.4% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 55,056 psi | 89% | 3028 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 96% | 54,476 psi | 88% | 3041 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 98% | 54,882 psi | 89% | 3081 fps | 98% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 54,215 psi | 87% | 2966 fps | 99.9% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 50,140 psi | 81% | 2907 fps | 100% |
| Somchem S321 | <<locked>> | 92% | 53,766 psi | 87% | 3061 fps | 99% |
| Somchem S335 | <<locked>> | 98% | 55,912 psi | 90% | 3009 fps | 100% |
| Somchem S341 | <<locked>> | 96% | 53,780 psi | 87% | 3041 fps | 97.7% |
| Somchem S355ᴾ | <<locked>> | 100% | 45,977 psi | 74% | 2943 fps | 96.8% |
| Vihtavuori N120 | <<locked>> | 86% | 55,941 psi | 90% | 2923 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 54,259 psi | 88% | 2953 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 53,766 psi | 87% | 2959 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 53,171 psi | 86% | 3031 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 55,288 psi | 89% | 3045 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 44,411 psi | 72% | 2881 fps | 97.8% |
| Vihtavuori N530 | <<locked>> | 94% | 52,866 psi | 85% | 3018 fps | 98.7% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 53,693 psi | 87% | 3041 fps | 99.9% |
| Winchester 748 | <<locked>> | 96% | 55,056 psi | 89% | 3120 fps | 99.5% |
| Winchester StaBALL Match | <<locked>> | 98% | 54,012 psi | 87% | 3084 fps | 98.4% |
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% | 50,778 psi | 82% | 2867 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 34,098 psi | 55% | 2631 fps | 99.1% |
| Accurate 2200 | <<locked>> | 82% | 47,906 psi | 77% | 2956 fps | 95.6% |
| Accurate 2230 | <<locked>> | 80% | 44,527 psi | 72% | 2894 fps | 95.2% |
| Accurate 2460 | <<locked>> | 80% | 36,796 psi | 59% | 2713 fps | 97.5% |
| Accurate 2495 | <<locked>> | 80% | 26,121 psi | 42% | 2484 fps | 97.1% |
| Accurate 2520 | <<locked>> | 80% | 32,198 psi | 52% | 2641 fps | 95.5% |
| Accurate 4064 | <<locked>> | 84% | 28,398 psi | 46% | 2562 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 43,221 psi | 70% | 2746 fps | 99.6% |
| Accurate LT-32 | <<locked>> | 80% | 43,569 psi | 70% | 2759 fps | 98.5% |
| ADI AR 2206H | <<locked>> | 90% | 43,308 psi | 70% | 2877 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 46,499 psi | 75% | 2838 fps | 100% |
| ADI AR 2208 | <<locked>> | 96% | 44,643 psi | 72% | 2877 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 41,611 psi | 67% | 2841 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 84% | 38,058 psi | 61% | 2740 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 31,343 psi | 51% | 2651 fps | 99.9% |
| Alliant Power Pro 1200-R | 29.5 gr | 82% | 40,785 psi | 66% | 2887 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 48,820 psi | 79% | 3074 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 39,929 psi | 64% | 2835 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 39,117 psi | 63% | 2756 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 43,903 psi | 71% | 2910 fps | 95.1% |
| Alliant Reloder-7 | <<locked>> | 80% | 47,413 psi | 76% | 2848 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 41,611 psi | 67% | 2733 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 48,907 psi | 79% | 2995 fps | 95.6% |
| Bofors RP3 | <<locked>> | 94% | 39,146 psi | 63% | 2828 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 35,708 psi | 58% | 2641 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 84% | 35,302 psi | 57% | 2733 fps | 95.3% |
| Hodgdon CFE223 | 34.5 gr | 88% | 45,643 psi | 74% | 3002 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 80% | 37,811 psi | 61% | 2759 fps | 98.7% |
| Hodgdon H335 | <<locked>> | 80% | 38,377 psi | 62% | 2772 fps | 98.1% |
| Hodgdon H4198 | <<locked>> | 80% | 47,630 psi | 77% | 2848 fps | 99.7% |
| Hodgdon H4895 | <<locked>> | 88% | 40,915 psi | 66% | 2838 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 39,291 psi | 63% | 2848 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,598 psi | 40% | 1647 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 39,755 psi | 64% | 2792 fps | 95% |
| IMR 3031 | <<locked>> | 80% | 30,023 psi | 48% | 2625 fps | 97.4% |
| IMR 4064 | <<locked>> | 94% | 44,019 psi | 71% | 2861 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 40,654 psi | 66% | 2743 fps | 100% |
| IMR 4895 | <<locked>> | 92% | 42,134 psi | 68% | 2890 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 84% | 38,058 psi | 61% | 2740 fps | 95.4% |
| Lovex D073.4 | <<locked>> | 80% | 45,208 psi | 73% | 2894 fps | 98.7% |
| Lovex D073.5 | <<locked>> | 80% | 36,419 psi | 59% | 2707 fps | 96.1% |
| Lovex D073.6 | <<locked>> | 82% | 31,082 psi | 50% | 2625 fps | 95% |
| Lovex S053 | <<locked>> | 80% | 52,460 psi | 85% | 2831 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 42,293 psi | 68% | 2779 fps | 95.2% |
| Lovex S062 | <<locked>> | 90% | 37,898 psi | 61% | 2753 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 44,121 psi | 71% | 2828 fps | 100% |
| Norma 201 | <<locked>> | 86% | 37,072 psi | 60% | 2720 fps | 95.2% |
| Norma 202 | <<locked>> | 80% | 30,560 psi | 49% | 2579 fps | 95.6% |
| Norma 203B | <<locked>> | 94% | 43,018 psi | 69% | 2900 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 94% | 43,323 psi | 70% | 2913 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 88% | 42,264 psi | 68% | 2864 fps | 95.1% |
| Ramshot X-Terminator | <<locked>> | 86% | 44,628 psi | 72% | 2851 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,627 psi | 40% | 1686 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 37,565 psi | 61% | 2730 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 45,861 psi | 74% | 3022 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 35,621 psi | 57% | 2792 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 33,794 psi | 55% | 2628 fps | 96.5% |
| Rottweil R 902 | <<locked>> | 88% | 37,536 psi | 61% | 2723 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 96% | 39,044 psi | 63% | 2818 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 80% | 45,208 psi | 73% | 2894 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 31,082 psi | 50% | 2625 fps | 95% |
| Shooters World Precision | <<locked>> | 90% | 37,898 psi | 61% | 2753 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 39,842 psi | 64% | 2740 fps | 95.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 47,674 psi | 77% | 2598 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 41,989 psi | 68% | 2841 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 44,672 psi | 72% | 2949 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 39,972 psi | 64% | 2769 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 50,546 psi | 82% | 2979 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 42,061 psi | 68% | 2848 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,721 psi | 53% | 2552 fps | 96.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 28,195 psi | 45% | 2451 fps | 95.8% |
| Somchem S321 | <<locked>> | 82% | 37,913 psi | 61% | 2759 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 31,908 psi | 51% | 2549 fps | 97% |
| Somchem S341 | <<locked>> | 90% | 43,642 psi | 70% | 2864 fps | 95.4% |
| Somchem S355 | <<locked>> | 96% | 40,408 psi | 65% | 2831 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 46,543 psi | 75% | 2789 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 37,347 psi | 60% | 2664 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 80% | 32,648 psi | 53% | 2569 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 80% | 27,499 psi | 44% | 2513 fps | 97.5% |
| Vihtavuori N140 | <<locked>> | 80% | 28,703 psi | 46% | 2510 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 94% | 36,390 psi | 59% | 2713 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 84% | 37,826 psi | 61% | 2730 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 84% | 31,488 psi | 51% | 2598 fps | 95.8% |
| Winchester 748 | 30.8 gr | 82% | 33,895 psi | 55% | 2700 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 90% | 41,089 psi | 66% | 2848 fps | 95.6% |
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 86 powders for .25 GT loaded with the .257 | 90gr | CutEdge ER Raptor. ReloadSwiss RS 52 delivers the highest muzzle velocity at 3,150 fps; across all powders the maximum-charge window runs from 1,841 fps to 3,150 fps. Accurate 2495 gives the best case fill at 100 %, and 86 of the 86 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (427 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.257" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, ADI AR 2208 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 CFE223, Alliant Power Pro 1200-R, Winchester 748 rank at the top here: for .25 GT with the .257 | 90gr | CutEdge ER Raptor 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.