Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .263 | 130gr | Rhino Penetrator bullet and 51 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ADI AR 2218 and Vihtavuori N570.
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% | 57,464 psi | 88% | 3025 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 55,709 psi | 86% | 3127 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 84% | 56,695 psi | 87% | 3136 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 84% | 58,479 psi | 90% | 3117 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 57,188 psi | 88% | 3130 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 56,304 psi | 87% | 3110 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 57,101 psi | 88% | 3235 fps | 98.4% |
| ADI AR 2225 | <<locked>> | 96% | 55,854 psi | 86% | 3133 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 58,479 psi | 90% | 3110 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,870 psi | 89% | 3100 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,682 psi | 89% | 3123 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,028 psi | 86% | 3031 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,739 psi | 87% | 3110 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 56,666 psi | 87% | 3114 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 55,013 psi | 85% | 3143 fps | 97.7% |
| Alliant Reloder-50 | <<locked>> | 98% | 54,897 psi | 84% | 3130 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,435 psi | 88% | 3087 fps | 98.4% |
| Bofors RP15 | <<locked>> | 88% | 57,130 psi | 88% | 3117 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,405 psi | 87% | 3123 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 57,682 psi | 89% | 3123 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 57,972 psi | 89% | 3136 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,970 psi | 86% | 3061 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 58,740 psi | 90% | 3104 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 58,508 psi | 90% | 3015 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 56,173 psi | 86% | 3202 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,840 psi | 58% | 1995 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,144 psi | 86% | 3038 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 86% | 55,666 psi | 86% | 3114 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 58,711 psi | 90% | 3176 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 55,869 psi | 86% | 3002 fps | 100% |
| Norma 217 | <<locked>> | 98% | 56,275 psi | 87% | 3140 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,957 psi | 89% | 3143 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 57,130 psi | 88% | 3140 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 55,709 psi | 86% | 3064 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,957 psi | 60% | 2044 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 57,029 psi | 88% | 3182 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 56,028 psi | 86% | 3143 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 84% | 58,755 psi | 90% | 3084 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 84% | 57,841 psi | 89% | 3097 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,464 psi | 88% | 3094 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,275 psi | 87% | 3012 fps | 99.4% |
| Somchem S385 | <<locked>> | 84% | 58,088 psi | 89% | 3061 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 58,233 psi | 90% | 3051 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 57,667 psi | 89% | 3077 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 84% | 57,725 psi | 89% | 3061 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,232 psi | 88% | 3143 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 90% | 58,552 psi | 90% | 3140 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 92% | 56,565 psi | 87% | 3150 fps | 99% |
| Vihtavuori N570 | <<locked>> | 94% | 57,986 psi | 89% | 3215 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 86% | 56,840 psi | 87% | 3123 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 58,102 psi | 89% | 3064 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% | 47,036 psi | 72% | 2851 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 51,851 psi | 80% | 3054 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 80% | 49,110 psi | 76% | 2992 fps | 98% |
| ADI AR 2209 | <<locked>> | 80% | 50,995 psi | 78% | 2989 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 46,325 psi | 71% | 2930 fps | 98.4% |
| ADI AR 2217 | <<locked>> | 80% | 34,664 psi | 53% | 2654 fps | 95% |
| ADI AR 2218 | 81.8 gr | 92% | 45,556 psi | 70% | 2995 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 31,995 psi | 49% | 2618 fps | 97% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 51,343 psi | 79% | 2989 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,908 psi | 78% | 2982 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,079 psi | 72% | 2936 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,992 psi | 71% | 2867 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,030 psi | 62% | 2805 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,620 psi | 81% | 3051 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 47,210 psi | 73% | 2989 fps | 95.6% |
| Alliant Reloder-50 | <<locked>> | 94% | 47,311 psi | 73% | 2976 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,121 psi | 68% | 2835 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 43,918 psi | 68% | 2867 fps | 98.7% |
| Bofors RP30 | <<locked>> | 80% | 37,449 psi | 58% | 2736 fps | 96.2% |
| Bofors RP5 | <<locked>> | 80% | 47,079 psi | 72% | 2936 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 80% | 37,753 psi | 58% | 2740 fps | 97% |
| Hodgdon H4831 | <<locked>> | 80% | 48,849 psi | 75% | 2930 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,877 psi | 74% | 2910 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 54,897 psi | 84% | 2963 fps | 100% |
| Hodgdon Retumbo | 67.2 gr | 80% | 39,204 psi | 60% | 2854 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,471 psi | 44% | 1788 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,298 psi | 76% | 2913 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 80% | 45,208 psi | 70% | 2913 fps | 98.1% |
| IMR 8133 Enduron | <<locked>> | 86% | 36,477 psi | 56% | 2723 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 40,611 psi | 63% | 2723 fps | 99.6% |
| Norma 217 | <<locked>> | 82% | 32,024 psi | 49% | 2621 fps | 96% |
| Norma MRP | <<locked>> | 80% | 50,314 psi | 77% | 3012 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,672 psi | 70% | 2933 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 80% | 41,234 psi | 63% | 2799 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,196 psi | 45% | 1827 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,696 psi | 60% | 2828 fps | 99.2% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 41,510 psi | 64% | 2854 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 51,648 psi | 79% | 2963 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 80% | 50,662 psi | 78% | 2972 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,314 psi | 77% | 2969 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 52,779 psi | 81% | 2953 fps | 99% |
| Somchem S385 | <<locked>> | 80% | 50,937 psi | 78% | 2943 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 44,715 psi | 69% | 2815 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 88% | 50,343 psi | 77% | 2946 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 50,676 psi | 78% | 2949 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,777 psi | 77% | 3009 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 80% | 41,611 psi | 64% | 2812 fps | 96.9% |
| Vihtavuori N568 | <<locked>> | 84% | 42,496 psi | 65% | 2871 fps | 95.8% |
| Vihtavuori N570 | 76.7 gr | 88% | 46,775 psi | 72% | 2999 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,310 psi | 70% | 2936 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,123 psi | 73% | 2871 fps | 99.3% |
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 51 powders for 6.5-300 Weatherby Mag. loaded with the .263 | 130gr | Rhino Penetrator. ADI AR 2218 delivers the highest muzzle velocity at 3,235 fps; across all powders the maximum-charge window runs from 1,995 fps to 3,235 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 51 of the 51 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 0.263" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, IMR 8133 Enduron, ReloadSwiss RS 14 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 Retumbo, ADI AR 2218, Vihtavuori N570 rank at the top here: for 6.5-300 Weatherby Mag. with the .263 | 130gr | Rhino Penetrator 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.