Load Specifications
Load data in caliber 6.5 Creedmoor with .264 | 100gr | Sierra Hollow Point bullet and 93 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% | 55,825 psi | 88% | 3045 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,012 psi | 86% | 3058 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 53,577 psi | 85% | 3058 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 56,086 psi | 89% | 3127 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 56,753 psi | 90% | 3150 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 48,834 psi | 77% | 3084 fps | 97.3% |
| Accurate LT-30 | <<locked>> | 82% | 54,781 psi | 87% | 2982 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,172 psi | 87% | 3005 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,853 psi | 87% | 3133 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 96% | 55,869 psi | 89% | 3123 fps | 98.9% |
| ADI AR 2219 | <<locked>> | 82% | 55,927 psi | 89% | 3114 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 53,780 psi | 85% | 3081 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 88% | 53,882 psi | 85% | 3071 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,564 psi | 88% | 3199 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 54,215 psi | 86% | 3238 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 55,506 psi | 88% | 3146 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 55,027 psi | 87% | 3143 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,506 psi | 88% | 3054 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,883 psi | 89% | 3166 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,095 psi | 76% | 3091 fps | 97.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 56,043 psi | 89% | 3268 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,389 psi | 86% | 2976 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 54,694 psi | 87% | 3140 fps | 98.5% |
| Bofors RP3 | <<locked>> | 96% | 55,956 psi | 89% | 3166 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,927 psi | 89% | 3074 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 56,652 psi | 90% | 3169 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 54,563 psi | 86% | 3209 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 84% | 54,389 psi | 86% | 3087 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,898 psi | 89% | 3117 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 53,621 psi | 85% | 3114 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 90% | 55,332 psi | 88% | 3146 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,251 psi | 70% | 2966 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,099 psi | 86% | 3169 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,722 psi | 55% | 1919 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,811 psi | 90% | 3146 fps | 99.6% |
| IMR 3031 | <<locked>> | 90% | 54,752 psi | 87% | 3136 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,376 psi | 88% | 3110 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,738 psi | 88% | 3077 fps | 95.8% |
| IMR 4198 | <<locked>> | 84% | 55,361 psi | 88% | 3009 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,543 psi | 74% | 3025 fps | 96.9% |
| IMR 4895 | <<locked>> | 92% | 53,838 psi | 85% | 3146 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 88% | 53,780 psi | 85% | 3081 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 84% | 53,998 psi | 86% | 3068 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 90% | 54,244 psi | 86% | 3110 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 54,636 psi | 87% | 3054 fps | 99.2% |
| Lovex S062 | <<locked>> | 94% | 54,940 psi | 87% | 3107 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 53,795 psi | 85% | 3084 fps | 96.9% |
| Norma 201 | <<locked>> | 92% | 57,029 psi | 90% | 3130 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 53,896 psi | 85% | 3084 fps | 100% |
| Norma 203B | <<locked>> | 94% | 54,955 psi | 87% | 3153 fps | 99.3% |
| Norma URPᴾ | <<locked>> | 100% | 48,559 psi | 77% | 3077 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 94% | 55,782 psi | 88% | 3179 fps | 99.2% |
| Ramshot TAC | <<locked>> | 88% | 54,708 psi | 87% | 3094 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 88% | 53,911 psi | 85% | 3117 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,172 psi | 87% | 3084 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,056 psi | 56% | 1962 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 53,388 psi | 85% | 3068 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,172 psi | 86% | 3087 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 56,188 psi | 89% | 3241 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 55,738 psi | 88% | 3274 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,834 psi | 77% | 3110 fps | 97% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,676 psi | 79% | 3130 fps | 96.4% |
| Rottweil R 901 | <<locked>> | 88% | 54,534 psi | 86% | 3068 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 53,983 psi | 86% | 3071 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 98% | 55,434 psi | 88% | 3146 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 53,795 psi | 85% | 3084 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,244 psi | 86% | 3110 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,940 psi | 87% | 3107 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 56,942 psi | 90% | 3091 fps | 99.8% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 56,478 psi | 90% | 3123 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 53,664 psi | 85% | 3153 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 56,492 psi | 90% | 3077 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 56,231 psi | 89% | 3120 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 56,681 psi | 90% | 3153 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 55,448 psi | 88% | 3025 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,114 psi | 87% | 3015 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 55,434 psi | 88% | 3123 fps | 99.9% |
| Somchem S335 | <<locked>> | 90% | 54,708 psi | 87% | 3022 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 55,898 psi | 89% | 3120 fps | 99.2% |
| Somchem S355 | <<locked>> | 98% | 55,883 psi | 89% | 3146 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,424 psi | 69% | 3025 fps | 99% |
| Vihtavuori N130 | <<locked>> | 86% | 55,071 psi | 87% | 2992 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,419 psi | 88% | 3012 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 56,652 psi | 90% | 3097 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 54,273 psi | 86% | 3058 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,012 psi | 86% | 3074 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,097 psi | 81% | 3081 fps | 97.6% |
| Vihtavuori N530 | <<locked>> | 88% | 54,549 psi | 86% | 3084 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 94% | 56,188 psi | 89% | 3104 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,517 psi | 80% | 3087 fps | 97.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,518 psi | 83% | 3071 fps | 99.4% |
| Winchester 748 | <<locked>> | 88% | 54,056 psi | 86% | 3136 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 92% | 56,405 psi | 89% | 3159 fps | 99.7% |
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% | 43,366 psi | 69% | 2841 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,384 psi | 75% | 2949 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 35,911 psi | 57% | 2736 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,351 psi | 67% | 2890 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 33,953 psi | 54% | 2713 fps | 98.6% |
| Accurate 4350 | <<locked>> | 96% | 42,612 psi | 68% | 2963 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 51,503 psi | 82% | 2930 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,895 psi | 82% | 2956 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,827 psi | 63% | 2835 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 84% | 38,421 psi | 61% | 2782 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 52,156 psi | 83% | 3051 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,843 psi | 66% | 2858 fps | 98.1% |
| Alliant AR-Comp | <<locked>> | 80% | 41,162 psi | 65% | 2867 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,501 psi | 77% | 3074 fps | 98.8% |
| Alliant Power Pro 2000-MR | 41.7 gr | 84% | 41,118 psi | 65% | 2966 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,234 psi | 64% | 2851 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,141 psi | 53% | 2690 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,907 psi | 78% | 2953 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 38,043 psi | 60% | 2812 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 96% | 42,540 psi | 67% | 2972 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 88% | 37,536 psi | 59% | 2881 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,010 psi | 81% | 2927 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 41,713 psi | 66% | 2894 fps | 95.6% |
| Bofors RP3 | <<locked>> | 82% | 34,896 psi | 55% | 2746 fps | 95.9% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,729 psi | 69% | 2854 fps | 98.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,118 psi | 64% | 2864 fps | 98.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,222 psi | 70% | 3012 fps | 97% |
| Hodgdon H322 | <<locked>> | 80% | 47,906 psi | 76% | 2982 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,762 psi | 77% | 3002 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 43,772 psi | 69% | 2927 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 40,161 psi | 64% | 2848 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 36,564 psi | 58% | 2792 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,129 psi | 57% | 2805 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,889 psi | 41% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,653 psi | 61% | 2799 fps | 96.5% |
| IMR 3031 | <<locked>> | 80% | 39,334 psi | 62% | 2864 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 37,826 psi | 60% | 2762 fps | 95.1% |
| IMR 4166 Enduron | <<locked>> | 90% | 52,460 psi | 83% | 3022 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 49,458 psi | 78% | 2917 fps | 100% |
| IMR 4831 | <<locked>> | 96% | 40,901 psi | 65% | 2907 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 36,550 psi | 58% | 2789 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 41,843 psi | 66% | 2858 fps | 98.1% |
| Lovex D073.5 | <<locked>> | 80% | 47,036 psi | 75% | 2949 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 38,609 psi | 61% | 2822 fps | 98.8% |
| Lovex S060 | <<locked>> | 80% | 40,393 psi | 64% | 2782 fps | 96.5% |
| Lovex S062 | <<locked>> | 80% | 35,346 psi | 56% | 2717 fps | 96.4% |
| Lovex S065 | <<locked>> | 96% | 47,645 psi | 76% | 2972 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 39,059 psi | 62% | 2792 fps | 97.5% |
| Norma 202 | <<locked>> | 80% | 39,160 psi | 62% | 2812 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 37,376 psi | 59% | 2799 fps | 95.6% |
| Norma URP | <<locked>> | 96% | 42,714 psi | 68% | 2963 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 82% | 36,912 psi | 59% | 2805 fps | 95.1% |
| Ramshot TAC | <<locked>> | 84% | 47,659 psi | 76% | 2966 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,118 psi | 65% | 2871 fps | 96.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,324 psi | 72% | 2904 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,005 psi | 41% | 1755 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,891 psi | 74% | 2953 fps | 99.7% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 50,662 psi | 80% | 3028 fps | 95.4% |
| ReloadSwiss RS 52 | 39.5 gr | 82% | 39,595 psi | 63% | 2920 fps | 95.6% |
| ReloadSwiss RS 60 | 39.1 gr | 80% | 30,487 psi | 48% | 2690 fps | 95.3% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 42,380 psi | 67% | 2976 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 46,398 psi | 74% | 3058 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 42,714 psi | 68% | 2854 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 80% | 37,231 psi | 59% | 2743 fps | 96.9% |
| Rottweil R 903 | <<locked>> | 84% | 35,041 psi | 56% | 2743 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 47,645 psi | 76% | 2972 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,609 psi | 61% | 2822 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 35,346 psi | 56% | 2717 fps | 96.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,617 psi | 79% | 2969 fps | 99.1% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,794 psi | 84% | 3064 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 38,609 psi | 61% | 2854 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,719 psi | 79% | 2972 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 45,716 psi | 72% | 2933 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,348 psi | 61% | 2795 fps | 95.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,698 psi | 65% | 2766 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,504 psi | 53% | 2612 fps | 98.9% |
| Somchem S321 | <<locked>> | 80% | 45,295 psi | 72% | 2943 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 40,190 psi | 64% | 2766 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 39,711 psi | 63% | 2818 fps | 96.2% |
| Somchem S355 | <<locked>> | 84% | 35,897 psi | 57% | 2749 fps | 95.6% |
| Somchem S365 | <<locked>> | 90% | 31,502 psi | 50% | 2720 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 46,050 psi | 73% | 2851 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,828 psi | 65% | 2769 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,201 psi | 57% | 2740 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,999 psi | 59% | 2740 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 82% | 31,981 psi | 51% | 2628 fps | 95.8% |
| Vihtavuori N160 | <<locked>> | 94% | 41,959 psi | 67% | 2904 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 41,800 psi | 66% | 2848 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 80% | 35,621 psi | 56% | 2720 fps | 98.5% |
| Vihtavuori N550 | <<locked>> | 96% | 44,280 psi | 70% | 2969 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 35,201 psi | 56% | 2710 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 41,104 psi | 65% | 2894 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,550 psi | 60% | 2799 fps | 96.3% |
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 110 powders for 6.5 Creedmoor loaded with the .264 | 100gr | Sierra Hollow Point. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,274 fps; across all powders the maximum-charge window runs from 1,919 fps to 3,274 fps. Accurate 4350 gives the best case fill at 100 %, and 110 of the 110 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.264" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 6.5 Creedmoor with the .264 | 100gr | Sierra Hollow Point they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Alliant Reloder-23, Alliant Reloder-26 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.