Load Specifications
Load data in caliber 7 x 66 SE v. Hofe with .284 | 127gr | RWS Evolution Green bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country 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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 56,231 psi | 88% | 3120 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,230 psi | 85% | 3143 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,782 psi | 89% | 3251 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 56,927 psi | 89% | 3182 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,665 psi | 86% | 3245 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 54,578 psi | 86% | 3350 fps | 97.4% |
| Accurate MAGPRO | <<locked>> | 98% | 55,434 psi | 87% | 3343 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 86% | 57,348 psi | 90% | 3225 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,985 psi | 88% | 3301 fps | 98.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,580 psi | 90% | 3356 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,276 psi | 90% | 3366 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,159 psi | 88% | 3294 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,505 psi | 85% | 3192 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,824 psi | 86% | 3219 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,680 psi | 87% | 3314 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,377 psi | 90% | 3340 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,405 psi | 87% | 3281 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,724 psi | 89% | 3346 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,650 psi | 84% | 3271 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,369 psi | 73% | 3186 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,882 psi | 84% | 3360 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,866 psi | 81% | 3261 fps | 97.8% |
| Bofors RP3 | <<locked>> | 84% | 55,303 psi | 87% | 3209 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,724 psi | 89% | 3346 fps | 98.7% |
| Bofors RP7 | <<locked>> | 88% | 54,737 psi | 86% | 3192 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 55,753 psi | 87% | 3228 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,116 psi | 90% | 3307 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 88% | 56,724 psi | 89% | 3264 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 53,940 psi | 85% | 3228 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,492 psi | 89% | 3274 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,999 psi | 88% | 3225 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,290 psi | 90% | 3268 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,353 psi | 71% | 3225 fps | 97.2% |
| Hodgdon Superformance | <<locked>> | 88% | 53,737 psi | 84% | 3281 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,332 psi | 57% | 2047 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,740 psi | 90% | 3232 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,594 psi | 89% | 3205 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,753 psi | 87% | 3189 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 56,246 psi | 88% | 3235 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,637 psi | 89% | 3228 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 55,332 psi | 87% | 3241 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,246 psi | 88% | 3248 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,259 psi | 87% | 3215 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,853 psi | 86% | 3323 fps | 97.3% |
| Lovex S062 | <<locked>> | 84% | 56,652 psi | 89% | 3196 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,681 psi | 89% | 3222 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 54,534 psi | 85% | 3209 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,021 psi | 74% | 3084 fps | 98.9% |
| Norma 203B | <<locked>> | 84% | 57,508 psi | 90% | 3258 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,261 psi | 90% | 3294 fps | 98.4% |
| Norma MRP | <<locked>> | 98% | 56,536 psi | 89% | 3379 fps | 99.5% |
| Norma URP | <<locked>> | 92% | 57,261 psi | 90% | 3291 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,114 psi | 86% | 3228 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,564 psi | 87% | 3343 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 56,231 psi | 88% | 3294 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,792 psi | 78% | 3202 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,014 psi | 58% | 2096 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,767 psi | 87% | 3212 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,666 psi | 89% | 3330 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,013 psi | 86% | 3274 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,377 psi | 90% | 3369 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,629 psi | 72% | 3219 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 82% | 55,201 psi | 87% | 3156 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,376 psi | 87% | 3202 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,638 psi | 90% | 3268 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 96% | 54,708 psi | 86% | 3271 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 54,737 psi | 86% | 3192 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,681 psi | 89% | 3222 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 56,652 psi | 89% | 3196 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,534 psi | 85% | 3209 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,305 psi | 90% | 3271 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,246 psi | 88% | 3077 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,376 psi | 88% | 3169 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,244 psi | 85% | 3264 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 55,332 psi | 87% | 3199 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,811 psi | 87% | 3192 fps | 96.6% |
| Somchem S365 | <<locked>> | 94% | 56,855 psi | 89% | 3291 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,259 psi | 87% | 3238 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 55,550 psi | 87% | 3110 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,941 psi | 88% | 3127 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,840 psi | 89% | 3173 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,550 psi | 87% | 3225 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 3212 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 54,157 psi | 85% | 3120 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,766 psi | 86% | 3228 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,956 psi | 88% | 3297 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,710 psi | 89% | 3369 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,608 psi | 87% | 3186 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,377 psi | 90% | 3310 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,588 psi | 78% | 3340 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,622 psi | 87% | 3235 fps | 98.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 52,779 psi | 83% | 3068 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,836 psi | 80% | 3084 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 34,534 psi | 54% | 2802 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 50,082 psi | 78% | 3077 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,406 psi | 60% | 2923 fps | 98.3% |
| Accurate High Country | 71.8 gr | 92% | 47,050 psi | 74% | 3202 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 96% | 51,721 psi | 81% | 3274 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 47,355 psi | 74% | 3051 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,830 psi | 67% | 3035 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 94% | 46,833 psi | 73% | 3146 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,200 psi | 83% | 3297 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,888 psi | 67% | 3035 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,979 psi | 75% | 3081 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,329 psi | 80% | 3159 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,376 psi | 59% | 2940 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,772 psi | 67% | 3081 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,424 psi | 66% | 3025 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 92% | 43,004 psi | 67% | 3084 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,253 psi | 43% | 2654 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,272 psi | 52% | 2854 fps | 95.6% |
| Alliant Reloder-26 | 66 gr | 82% | 31,546 psi | 49% | 2844 fps | 95.6% |
| Bofors RP15 | <<locked>> | 94% | 42,409 psi | 66% | 3064 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 48,283 psi | 76% | 3091 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 43,004 psi | 67% | 3084 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 42,424 psi | 66% | 2949 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 80% | 48,791 psi | 76% | 3107 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 40,480 psi | 63% | 2979 fps | 96.5% |
| Hodgdon H4350 | <<locked>> | 80% | 43,424 psi | 68% | 3005 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 94% | 50,343 psi | 79% | 3163 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,197 psi | 77% | 3140 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,853 psi | 55% | 2818 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,388 psi | 84% | 3205 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,380 psi | 66% | 3150 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 39,668 psi | 62% | 2989 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 43% | 1837 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,085 psi | 85% | 3173 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,806 psi | 78% | 3091 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,040 psi | 82% | 3123 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 37,971 psi | 60% | 2861 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,772 psi | 69% | 2979 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 36,898 psi | 58% | 2871 fps | 98% |
| IMR 4895 | <<locked>> | 80% | 52,692 psi | 83% | 3189 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,762 psi | 76% | 3094 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 96% | 47,747 psi | 75% | 3186 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 49,922 psi | 78% | 3084 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,292 psi | 65% | 2927 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 39,407 psi | 62% | 2900 fps | 96.3% |
| Lovex S071 | <<locked>> | 90% | 33,591 psi | 53% | 2776 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 50,662 psi | 79% | 3143 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,265 psi | 68% | 3022 fps | 95.3% |
| Norma MRP | 68.7 gr | 88% | 39,305 psi | 62% | 3025 fps | 96% |
| Norma URP | <<locked>> | 80% | 38,189 psi | 60% | 2920 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 51,372 psi | 81% | 3166 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 47,877 psi | 75% | 3196 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 37,101 psi | 58% | 2904 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 94% | 39,508 psi | 62% | 2979 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 43% | 1880 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,791 psi | 76% | 3087 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,527 psi | 71% | 3143 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,290 psi | 60% | 2943 fps | 98.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,246 psi | 58% | 2953 fps | 97.5% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,378 psi | 62% | 3061 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 80% | 51,663 psi | 81% | 3100 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,368 psi | 71% | 3028 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,384 psi | 74% | 3077 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 88% | 41,452 psi | 65% | 3005 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 42,424 psi | 66% | 2949 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,292 psi | 65% | 2927 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 49,922 psi | 78% | 3084 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,407 psi | 62% | 2900 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,833 psi | 73% | 3091 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,630 psi | 73% | 2930 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,364 psi | 63% | 2861 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,075 psi | 64% | 2995 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 45,745 psi | 72% | 3031 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,098 psi | 82% | 3130 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 34,606 psi | 54% | 2867 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 39,276 psi | 62% | 2920 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 52,112 psi | 82% | 3058 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,388 psi | 82% | 3074 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,656 psi | 68% | 2949 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,726 psi | 62% | 2923 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 92% | 41,597 psi | 65% | 2959 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 50,792 psi | 80% | 3064 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,160 psi | 61% | 2920 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 30,124 psi | 47% | 2736 fps | 96.1% |
| Vihtavuori N560 | <<locked>> | 94% | 49,197 psi | 77% | 3225 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,870 psi | 61% | 2884 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,640 psi | 64% | 2982 fps | 96.5% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,730 psi | 40% | 2680 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,771 psi | 65% | 2969 fps | 95.1% |
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 91 powders for 7 x 66 SE v. Hofe loaded with the .284 | 127gr | RWS Evolution Green. Norma MRP delivers the highest muzzle velocity at 3,379 fps; across all powders the maximum-charge window runs from 2,047 fps to 3,379 fps. Accurate 3100 gives the best case fill at 100 %, and 91 of the 91 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 127.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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, Accurate High Country, Norma MRP rank at the top here: for 7 x 66 SE v. Hofe with the .284 | 127gr | RWS Evolution Green 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.