Load Specifications
Load data in caliber 6.5-06 Ackley Improved with .263 | 123gr | Prvi Partizan SP bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
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 2700 | <<locked>> | 82% | 57,058 psi | 88% | 2959 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 56,695 psi | 87% | 3015 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 56,797 psi | 87% | 2936 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 58,421 psi | 90% | 3061 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,955 psi | 85% | 3097 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 56,304 psi | 87% | 2969 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,288 psi | 85% | 3048 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 56,753 psi | 87% | 3107 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,276 psi | 60% | 2805 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,506 psi | 85% | 3045 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,522 psi | 89% | 2995 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,595 psi | 89% | 3015 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,376 psi | 85% | 3064 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,579 psi | 87% | 3077 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 58,392 psi | 90% | 3094 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,289 psi | 87% | 3100 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,305 psi | 88% | 3081 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,530 psi | 76% | 3018 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,769 psi | 89% | 3173 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,100 psi | 85% | 3081 fps | 98.6% |
| Bofors RP3 | <<locked>> | 84% | 58,740 psi | 90% | 3015 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,397 psi | 70% | 2933 fps | 95.9% |
| Bofors RP5 | <<locked>> | 98% | 56,289 psi | 87% | 3100 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 57,667 psi | 89% | 3005 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,907 psi | 75% | 2956 fps | 97% |
| Hodgdon H380 | <<locked>> | 82% | 55,100 psi | 85% | 2976 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,550 psi | 87% | 3054 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 55,709 psi | 86% | 3012 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 57,029 psi | 88% | 3048 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,796 psi | 86% | 3028 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,695 psi | 86% | 2982 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,356 psi | 74% | 3058 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 88% | 57,000 psi | 88% | 3094 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 56% | 1886 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,941 psi | 86% | 2953 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 58,160 psi | 90% | 2989 fps | 99.7% |
| IMR 4350 | <<locked>> | 90% | 55,419 psi | 85% | 2986 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,593 psi | 86% | 2976 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 58,494 psi | 90% | 3045 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 58,015 psi | 89% | 3028 fps | 97.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 58,044 psi | 89% | 3140 fps | 98.1% |
| Lovex S062 | <<locked>> | 82% | 56,289 psi | 87% | 2946 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,014 psi | 86% | 2972 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 57,624 psi | 89% | 3022 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,444 psi | 78% | 2917 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 56,884 psi | 88% | 3002 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,405 psi | 87% | 3038 fps | 98.5% |
| Norma MRP | <<locked>> | 96% | 56,130 psi | 86% | 3127 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 56,739 psi | 87% | 3041 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 58,073 psi | 89% | 3031 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,824 psi | 84% | 3097 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 55,622 psi | 86% | 3041 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,200 psi | 82% | 3035 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,449 psi | 58% | 1932 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 58,581 psi | 90% | 3018 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,912 psi | 86% | 3068 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 58,305 psi | 90% | 3084 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,753 psi | 87% | 3114 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,675 psi | 75% | 3058 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 82% | 57,957 psi | 89% | 2956 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 55,187 psi | 85% | 2956 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,797 psi | 87% | 3018 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 96% | 57,899 psi | 89% | 3084 fps | 99% |
| Rottweil R 907 | <<locked>> | 88% | 57,667 psi | 89% | 3005 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,014 psi | 86% | 2972 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 56,289 psi | 87% | 2946 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,624 psi | 89% | 3022 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,652 psi | 87% | 3018 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,651 psi | 86% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,579 psi | 86% | 2923 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 57,435 psi | 88% | 3077 fps | 98.9% |
| Somchem S355 | <<locked>> | 86% | 58,407 psi | 90% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,085 psi | 85% | 2953 fps | 96.8% |
| Somchem S365 | <<locked>> | 92% | 56,666 psi | 87% | 3041 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 58,581 psi | 90% | 3054 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 82% | 58,624 psi | 90% | 2910 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 58,784 psi | 90% | 2927 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 56,260 psi | 87% | 2927 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 58,798 psi | 90% | 3035 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,972 psi | 89% | 3031 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 56,898 psi | 88% | 2923 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,914 psi | 89% | 3041 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,912 psi | 86% | 3051 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,173 psi | 86% | 3117 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,663 psi | 80% | 3022 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 58,624 psi | 90% | 2995 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,550 psi | 87% | 3054 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,896 psi | 83% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 58,711 psi | 90% | 3051 fps | 98.9% |
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 2700 | <<locked>> | 80% | 53,345 psi | 82% | 2897 fps | 98.8% |
| Accurate 3100 | <<locked>> | 82% | 32,793 psi | 50% | 2546 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 53,301 psi | 82% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,423 psi | 64% | 2766 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 94% | 51,169 psi | 79% | 3031 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 49,893 psi | 77% | 2867 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,569 psi | 66% | 2805 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 92% | 46,311 psi | 71% | 2913 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 36,854 psi | 57% | 2740 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,902 psi | 66% | 2805 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,734 psi | 78% | 2890 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 54,070 psi | 83% | 2963 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,827 psi | 61% | 2769 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,788 psi | 70% | 2904 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,438 psi | 65% | 2802 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,277 psi | 62% | 2792 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,443 psi | 45% | 2516 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,444 psi | 48% | 2589 fps | 95% |
| Alliant Reloder-26 | 52.4 gr | 80% | 31,894 psi | 49% | 2641 fps | 96.2% |
| Bofors RP15 | <<locked>> | 92% | 42,438 psi | 65% | 2841 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 51,329 psi | 79% | 2904 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,467 psi | 65% | 2871 fps | 95% |
| Bofors RP5 | <<locked>> | 88% | 40,277 psi | 62% | 2792 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 44,817 psi | 69% | 2776 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 98% | 45,759 psi | 70% | 2890 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 51,677 psi | 80% | 2920 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 43,294 psi | 67% | 2815 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 45,890 psi | 71% | 2831 fps | 97% |
| Hodgdon H4831 | <<locked>> | 92% | 49,705 psi | 76% | 2920 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,617 psi | 75% | 2900 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,492 psi | 58% | 2657 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,624 psi | 61% | 2854 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 42,322 psi | 65% | 2828 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 42% | 1686 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,504 psi | 81% | 2900 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,679 psi | 84% | 2936 fps | 99.4% |
| IMR 4350 | <<locked>> | 80% | 40,321 psi | 62% | 2697 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,166 psi | 71% | 2805 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 39,653 psi | 61% | 2713 fps | 98.9% |
| IMR 4955 Enduron | <<locked>> | 90% | 48,138 psi | 74% | 2858 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 47,529 psi | 73% | 2949 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 52,852 psi | 81% | 2894 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,656 psi | 67% | 2753 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 42,090 psi | 65% | 2736 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 34,330 psi | 53% | 2582 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 53,403 psi | 82% | 2946 fps | 100% |
| Norma 204 | <<locked>> | 82% | 43,033 psi | 66% | 2792 fps | 95.6% |
| Norma MRP | 53.4 gr | 84% | 36,796 psi | 57% | 2740 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 40,959 psi | 63% | 2756 fps | 99% |
| Ramshot Big Game | <<locked>> | 80% | 54,273 psi | 84% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 44,338 psi | 68% | 2894 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 39,769 psi | 61% | 2743 fps | 97.4% |
| Ramshot Magnum | <<locked>> | 92% | 39,421 psi | 61% | 2762 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,963 psi | 43% | 1726 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,503 psi | 79% | 2904 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,573 psi | 75% | 2956 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,191 psi | 63% | 2779 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,769 psi | 61% | 2792 fps | 98.5% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,680 psi | 56% | 2769 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 54,694 psi | 84% | 2910 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,515 psi | 75% | 2851 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,891 psi | 72% | 2841 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 86% | 41,626 psi | 64% | 2782 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 44,817 psi | 69% | 2776 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,656 psi | 67% | 2753 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 52,852 psi | 81% | 2894 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,090 psi | 65% | 2736 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,690 psi | 76% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,211 psi | 76% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,815 psi | 66% | 2697 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,249 psi | 63% | 2779 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 48,370 psi | 74% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,196 psi | 74% | 2835 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 37,492 psi | 58% | 2710 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 39,508 psi | 61% | 2703 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 55,230 psi | 85% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 55,216 psi | 85% | 2877 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 46,427 psi | 71% | 2772 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,337 psi | 65% | 2753 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 39,015 psi | 60% | 2687 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 53,490 psi | 82% | 2874 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,843 psi | 64% | 2756 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 33,040 psi | 51% | 2602 fps | 97.6% |
| Vihtavuori N560 | 58.4 gr | 92% | 48,704 psi | 75% | 2982 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 98% | 48,414 psi | 75% | 2963 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,336 psi | 64% | 2720 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,294 psi | 67% | 2815 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,165 psi | 40% | 2497 fps | 96.7% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,510 psi | 64% | 2746 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 89 powders for 6.5-06 Ackley Improved loaded with the .263 | 123gr | Prvi Partizan SP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,173 fps. ADI AR 2225 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 123.0 gr projectile in 0.263" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, Alliant Reloder-25 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for 6.5-06 Ackley Improved with the .263 | 123gr | Prvi Partizan SP 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.