Load Specifications
Load data in caliber 6.5 PRC with .264 | 128gr | Peregrine VLR-5 bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Ramshot Grand and Norma MRP.
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 2495 | <<locked>> | 82% | 56,086 psi | 86% | 2815 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,492 psi | 85% | 2854 fps | 99.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,159 psi | 86% | 2946 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 56,637 psi | 87% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 58,334 psi | 90% | 2995 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,709 psi | 86% | 3041 fps | 96% |
| ADI AR 2208 | <<locked>> | 86% | 57,203 psi | 88% | 2917 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,811 psi | 86% | 2992 fps | 98.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,971 psi | 88% | 3045 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,058 psi | 88% | 3045 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,972 psi | 89% | 2936 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 58,320 psi | 90% | 2963 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,361 psi | 85% | 2999 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,014 psi | 88% | 3022 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 58,798 psi | 90% | 3035 fps | 99.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,057 psi | 86% | 3038 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,098 psi | 82% | 2963 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,890 psi | 71% | 2890 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,276 psi | 88% | 3110 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,343 psi | 79% | 2956 fps | 98.1% |
| Bofors RP3 | <<locked>> | 84% | 55,201 psi | 85% | 2900 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,057 psi | 86% | 3038 fps | 98.9% |
| Bofors RP7 | <<locked>> | 90% | 58,102 psi | 89% | 2946 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 84% | 55,564 psi | 86% | 2920 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 58,131 psi | 89% | 3015 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 92% | 58,392 psi | 90% | 2986 fps | 99.2% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 52,460 psi | 81% | 2910 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,043 psi | 86% | 2969 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,811 psi | 86% | 2920 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,377 psi | 88% | 2959 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,875 psi | 69% | 2930 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 90% | 57,406 psi | 88% | 3038 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 56% | 1818 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,579 psi | 87% | 2904 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,999 psi | 86% | 2867 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,956 psi | 86% | 2887 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 58,102 psi | 89% | 2920 fps | 99.7% |
| IMR 4350 | <<locked>> | 92% | 55,825 psi | 86% | 2927 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,217 psi | 87% | 2917 fps | 99.5% |
| IMR 4831 | <<locked>> | 96% | 56,086 psi | 86% | 2949 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,883 psi | 86% | 2930 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 58,639 psi | 90% | 2972 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 98% | 54,882 psi | 84% | 3022 fps | 97.6% |
| Lovex S060 | <<locked>> | 82% | 57,957 psi | 89% | 2881 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,710 psi | 87% | 2887 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,521 psi | 87% | 2917 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 57,725 psi | 89% | 2956 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,383 psi | 71% | 2789 fps | 99% |
| Norma 201 | <<locked>> | 82% | 57,725 psi | 89% | 2894 fps | 100% |
| Norma 203B | <<locked>> | 84% | 57,580 psi | 89% | 2946 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,826 psi | 87% | 2982 fps | 98.7% |
| Norma MRP | <<locked>> | 98% | 55,898 psi | 86% | 3064 fps | 99.7% |
| Norma URP | <<locked>> | 92% | 56,811 psi | 87% | 2979 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 58,769 psi | 90% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,679 psi | 84% | 3031 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 55,796 psi | 86% | 2982 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,622 psi | 86% | 3012 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,072 psi | 57% | 1864 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,564 psi | 86% | 2907 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,391 psi | 87% | 3012 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 58,450 psi | 90% | 3022 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,956 psi | 88% | 3051 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,918 psi | 69% | 2923 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 84% | 58,639 psi | 90% | 2900 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,405 psi | 85% | 2897 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,305 psi | 88% | 2959 fps | 98% |
| Rottweil R 905 | <<locked>> | 98% | 58,146 psi | 89% | 3025 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 90% | 58,102 psi | 89% | 2946 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,521 psi | 87% | 2917 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 56,710 psi | 87% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,725 psi | 89% | 2956 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,217 psi | 88% | 2959 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 58,059 psi | 89% | 2933 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 58,566 psi | 90% | 2822 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,391 psi | 87% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,130 psi | 86% | 2867 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,653 psi | 89% | 3018 fps | 99% |
| Somchem S335 | <<locked>> | 82% | 58,146 psi | 89% | 2818 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 55,129 psi | 85% | 2890 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,361 psi | 85% | 2897 fps | 96.9% |
| Somchem S365 | <<locked>> | 94% | 56,376 psi | 87% | 2976 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 58,610 psi | 90% | 2992 fps | 99.5% |
| Unknown powder | <<locked>> | 90% | 57,609 psi | 89% | 2986 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 58,595 psi | 90% | 2799 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 55,506 psi | 85% | 2805 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 58,479 psi | 90% | 2858 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 57,145 psi | 88% | 2877 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,928 psi | 89% | 2953 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,272 psi | 80% | 2884 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 84% | 58,363 psi | 90% | 2887 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 58,421 psi | 90% | 3002 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,405 psi | 85% | 2986 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,318 psi | 87% | 3064 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,940 psi | 85% | 2884 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 58,131 psi | 89% | 3015 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,849 psi | 75% | 3031 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,913 psi | 88% | 2963 fps | 98.8% |
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 2495 | <<locked>> | 80% | 52,518 psi | 81% | 2766 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,527 psi | 70% | 2687 fps | 97.5% |
| Accurate 3100 | <<locked>> | 84% | 32,184 psi | 50% | 2487 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 49,835 psi | 77% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,261 psi | 59% | 2648 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 98% | 51,793 psi | 80% | 2976 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 47,398 psi | 73% | 2759 fps | 100% |
| ADI AR 2209 | <<locked>> | 88% | 42,699 psi | 66% | 2753 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 94% | 46,456 psi | 71% | 2854 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,069 psi | 82% | 2982 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,964 psi | 74% | 2782 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,155 psi | 79% | 2851 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,318 psi | 57% | 2657 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,583 psi | 66% | 2785 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,235 psi | 65% | 2743 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,813 psi | 61% | 2733 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,137 psi | 42% | 2402 fps | 96.6% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,067 psi | 48% | 2533 fps | 95.1% |
| Alliant Reloder-26 | 48.6 gr | 80% | 29,080 psi | 45% | 2513 fps | 95% |
| Bofors RP15 | <<locked>> | 94% | 41,901 psi | 64% | 2776 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 48,211 psi | 74% | 2792 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,813 psi | 61% | 2733 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 42,351 psi | 65% | 2667 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 80% | 48,617 psi | 75% | 2808 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 43,961 psi | 68% | 2772 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 39,740 psi | 61% | 2641 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 98% | 49,124 psi | 76% | 2851 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,805 psi | 75% | 2848 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,809 psi | 54% | 2549 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,241 psi | 77% | 2851 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,218 psi | 60% | 2792 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 39,349 psi | 61% | 2707 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 42% | 1624 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,893 psi | 77% | 2799 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,721 psi | 81% | 2825 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,485 psi | 72% | 2736 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,556 psi | 70% | 2707 fps | 98.1% |
| IMR 4350 | <<locked>> | 80% | 38,072 psi | 59% | 2592 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,903 psi | 68% | 2700 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 33,373 psi | 51% | 2516 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 52,475 psi | 81% | 2881 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,385 psi | 74% | 2802 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 92% | 44,454 psi | 68% | 2828 fps | 95% |
| Lovex S060 | <<locked>> | 80% | 54,505 psi | 84% | 2828 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,995 psi | 77% | 2785 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,118 psi | 63% | 2644 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 39,363 psi | 61% | 2621 fps | 96.9% |
| Lovex S071 | <<locked>> | 90% | 33,402 psi | 51% | 2516 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 54,215 psi | 83% | 2844 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,488 psi | 78% | 2838 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,047 psi | 66% | 2736 fps | 95.8% |
| Norma MRP | 50.7 gr | 86% | 36,332 psi | 56% | 2680 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 38,130 psi | 59% | 2644 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 51,256 psi | 79% | 2864 fps | 100% |
| Ramshot Grand | 54.7 gr | 90% | 43,395 psi | 67% | 2818 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 37,086 psi | 57% | 2631 fps | 96.8% |
| Ramshot Magnum | <<locked>> | 90% | 37,565 psi | 58% | 2667 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,615 psi | 43% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,530 psi | 75% | 2789 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,281 psi | 70% | 2841 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,261 psi | 59% | 2667 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,144 psi | 57% | 2677 fps | 98% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,260 psi | 56% | 2710 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 51,735 psi | 80% | 2799 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,281 psi | 70% | 2736 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,121 psi | 68% | 2730 fps | 95% |
| Rottweil R 905 | <<locked>> | 88% | 41,495 psi | 64% | 2726 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 42,351 psi | 65% | 2667 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,118 psi | 63% | 2644 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 49,995 psi | 77% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,363 psi | 61% | 2621 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,804 psi | 72% | 2795 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,317 psi | 84% | 2877 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 55,216 psi | 85% | 2776 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,760 psi | 72% | 2644 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,263 psi | 62% | 2589 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,118 psi | 63% | 2720 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 54,708 psi | 84% | 2769 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,585 psi | 70% | 2736 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,414 psi | 75% | 2779 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 34,708 psi | 53% | 2598 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 36,666 psi | 56% | 2589 fps | 95.1% |
| Unknown powder | <<locked>> | 80% | 41,147 psi | 63% | 2700 fps | 98.7% |
| Vihtavuori N133 | <<locked>> | 80% | 52,228 psi | 80% | 2710 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 52,286 psi | 80% | 2759 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,590 psi | 79% | 2762 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,204 psi | 60% | 2585 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,147 psi | 63% | 2671 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 92% | 39,958 psi | 61% | 2654 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 51,300 psi | 79% | 2789 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,829 psi | 64% | 2717 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 30,052 psi | 46% | 2480 fps | 96.8% |
| Vihtavuori N560 | <<locked>> | 94% | 45,992 psi | 71% | 2874 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,841 psi | 60% | 2615 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 43,961 psi | 68% | 2772 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,931 psi | 37% | 2365 fps | 95.1% |
| Winchester Supreme 780 | <<locked>> | 88% | 42,395 psi | 65% | 2710 fps | 95.8% |
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 106 powders for 6.5 PRC loaded with the .264 | 128gr | Peregrine VLR-5. Alliant Reloder-26 delivers the highest muzzle velocity at 3,110 fps; across all powders the maximum-charge window runs from 1,818 fps to 3,110 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 128.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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 Reloder-26, Ramshot Grand, Norma MRP rank at the top here: for 6.5 PRC with the .264 | 128gr | Peregrine VLR-5 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 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.