Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 130gr | CutEdge Maximus bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo and ReloadSwiss RS 76.
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 3100 | <<locked>> | 86% | 55,492 psi | 85% | 2999 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 57,827 psi | 89% | 3169 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 84% | 54,723 psi | 84% | 3104 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 84% | 56,985 psi | 88% | 3097 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,651 psi | 86% | 3110 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 96% | 58,639 psi | 90% | 3153 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 55,245 psi | 85% | 3205 fps | 98% |
| ADI AR 2225 | <<locked>> | 98% | 57,914 psi | 89% | 3173 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 57,188 psi | 88% | 3094 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,594 psi | 87% | 3084 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,043 psi | 86% | 3100 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,957 psi | 89% | 3064 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 58,769 psi | 90% | 3143 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,708 psi | 84% | 3091 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 57,174 psi | 88% | 3182 fps | 98.1% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,753 psi | 87% | 3163 fps | 97.5% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,999 psi | 86% | 3068 fps | 98.1% |
| Bofors RP15 | <<locked>> | 88% | 55,477 psi | 85% | 3094 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 58,276 psi | 90% | 3159 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 56,043 psi | 86% | 3100 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,072 psi | 86% | 3110 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 58,421 psi | 90% | 3104 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,217 psi | 88% | 3087 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,130 psi | 88% | 2999 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 58,233 psi | 90% | 3235 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,695 psi | 58% | 1991 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 58,798 psi | 90% | 3068 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 58,334 psi | 90% | 3077 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 88% | 58,073 psi | 89% | 3156 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,550 psi | 87% | 3143 fps | 99.9% |
| Lovex S071 | <<locked>> | 92% | 57,348 psi | 88% | 3031 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 58,102 psi | 89% | 3173 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,188 psi | 86% | 3117 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,347 psi | 85% | 3114 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 90% | 58,030 psi | 89% | 3104 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,783 psi | 60% | 2041 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,882 psi | 84% | 3156 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 58,436 psi | 90% | 3189 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 84% | 57,348 psi | 88% | 3068 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 56,188 psi | 86% | 3074 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,811 psi | 86% | 3071 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 58,755 psi | 90% | 3058 fps | 99.6% |
| Somchem S385 | <<locked>> | 84% | 56,420 psi | 87% | 3041 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,652 psi | 87% | 3031 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,796 psi | 86% | 3051 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 84% | 55,840 psi | 86% | 3038 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,593 psi | 86% | 3120 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 90% | 56,710 psi | 87% | 3114 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 94% | 58,769 psi | 90% | 3192 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 94% | 55,912 psi | 86% | 3182 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,534 psi | 84% | 3094 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,304 psi | 87% | 3038 fps | 100% |
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 3100 | <<locked>> | 80% | 45,121 psi | 69% | 2822 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 50,082 psi | 77% | 3028 fps | 99% |
| Accurate MAGPRO | <<locked>> | 80% | 47,384 psi | 73% | 2963 fps | 97.6% |
| ADI AR 2209 | <<locked>> | 80% | 49,748 psi | 77% | 2969 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 44,976 psi | 69% | 2907 fps | 98% |
| ADI AR 2217 | <<locked>> | 82% | 35,752 psi | 55% | 2687 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 94% | 47,311 psi | 73% | 3041 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 30,487 psi | 47% | 2579 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 49,864 psi | 77% | 2966 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,400 psi | 76% | 2956 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,643 psi | 70% | 2910 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,295 psi | 68% | 2841 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,522 psi | 59% | 2776 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,647 psi | 78% | 3022 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 45,411 psi | 70% | 2953 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 96% | 48,631 psi | 75% | 3009 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 46,006 psi | 71% | 2877 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 42,322 psi | 65% | 2838 fps | 98.3% |
| Bofors RP30 | <<locked>> | 80% | 35,708 psi | 55% | 2697 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 45,643 psi | 70% | 2910 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 80% | 36,245 psi | 56% | 2703 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 80% | 47,384 psi | 73% | 2907 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,615 psi | 72% | 2890 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,519 psi | 82% | 2946 fps | 100% |
| Hodgdon Retumbo | 66.7 gr | 80% | 37,594 psi | 58% | 2818 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,413 psi | 44% | 1785 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 55,274 psi | 85% | 3012 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,153 psi | 74% | 2894 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 80% | 43,613 psi | 67% | 2884 fps | 97.7% |
| IMR 8133 Enduron | <<locked>> | 88% | 37,260 psi | 57% | 2749 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 38,740 psi | 60% | 2687 fps | 99.3% |
| Norma 217 | <<locked>> | 84% | 32,648 psi | 50% | 2641 fps | 96.2% |
| Norma MRP | <<locked>> | 80% | 48,588 psi | 75% | 2986 fps | 99.9% |
| Ramshot Grand | <<locked>> | 80% | 43,961 psi | 68% | 2900 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 80% | 39,494 psi | 61% | 2762 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,109 psi | 45% | 1827 fps | 100% |
| ReloadSwiss RS 76 | 71.4 gr | 80% | 36,985 psi | 57% | 2789 fps | 98.7% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 39,653 psi | 61% | 2815 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 50,241 psi | 77% | 2943 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 80% | 49,052 psi | 75% | 2949 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,718 psi | 75% | 2943 fps | 99.5% |
| Somchem S361 | <<locked>> | 80% | 51,358 psi | 79% | 2930 fps | 98.8% |
| Somchem S385 | <<locked>> | 80% | 49,472 psi | 76% | 2923 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 43,178 psi | 66% | 2789 fps | 99% |
| Vihtavuori N170 | <<locked>> | 90% | 52,156 psi | 80% | 2982 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 48,805 psi | 75% | 2920 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,167 psi | 74% | 2982 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 80% | 39,856 psi | 61% | 2776 fps | 96.2% |
| Vihtavuori N568 | <<locked>> | 84% | 40,770 psi | 63% | 2835 fps | 95.1% |
| Vihtavuori N570 | 77.9 gr | 90% | 48,385 psi | 74% | 3038 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,308 psi | 67% | 2900 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,774 psi | 70% | 2851 fps | 99.1% |
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 52 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 130gr | CutEdge Maximus. Hodgdon Retumbo delivers the highest muzzle velocity at 3,235 fps; across all powders the maximum-charge window runs from 1,991 fps to 3,235 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 52 of the 52 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-50, Hodgdon TrailBoss, IMR 8133 Enduron 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 130gr | CutEdge Maximus 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.