Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 130gr | Winchester Silvertip bullet and 79 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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 54,404 psi | 85% | 3114 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 55,970 psi | 88% | 3159 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 56,739 psi | 89% | 3271 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 84% | 57,493 psi | 90% | 3123 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,753 psi | 89% | 3212 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 96% | 54,360 psi | 85% | 3209 fps | 97.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,585 psi | 71% | 3022 fps | 96% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,364 psi | 63% | 2969 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,984 psi | 86% | 3091 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,536 psi | 89% | 3219 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,215 psi | 85% | 3179 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,304 psi | 88% | 3199 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,070 psi | 85% | 3205 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,100 psi | 86% | 3186 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,966 psi | 80% | 3179 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,506 psi | 87% | 3281 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,855 psi | 89% | 3251 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 55,999 psi | 88% | 3110 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,731 psi | 73% | 3097 fps | 96.9% |
| Bofors RP5 | <<locked>> | 96% | 54,070 psi | 85% | 3205 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 55,129 psi | 86% | 3104 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,067 psi | 78% | 3117 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 56,289 psi | 88% | 3133 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,215 psi | 85% | 3159 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 56,884 psi | 89% | 3169 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 54,433 psi | 85% | 3143 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,087 psi | 89% | 3189 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,985 psi | 89% | 3133 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,763 psi | 78% | 3235 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 54,302 psi | 85% | 3189 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,709 psi | 58% | 1985 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,840 psi | 89% | 3104 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,681 psi | 89% | 3143 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,637 psi | 89% | 3130 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 56,289 psi | 88% | 3150 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,796 psi | 87% | 3133 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 98% | 55,811 psi | 87% | 3245 fps | 98.2% |
| Lovex S062 | <<locked>> | 82% | 57,203 psi | 90% | 3094 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,116 psi | 90% | 3127 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,259 psi | 87% | 3120 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,880 psi | 81% | 3074 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 57,682 psi | 90% | 3202 fps | 99% |
| Norma MRP | <<locked>> | 94% | 53,925 psi | 85% | 3232 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 54,389 psi | 85% | 3140 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,449 psi | 88% | 3268 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 56,898 psi | 89% | 3202 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,810 psi | 86% | 3196 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,536 psi | 59% | 2031 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,072 psi | 88% | 3117 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,653 psi | 90% | 3228 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,927 psi | 88% | 3182 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,230 psi | 85% | 3212 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,401 psi | 79% | 3235 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 56,362 psi | 88% | 3110 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,534 psi | 85% | 3120 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 55,492 psi | 87% | 3182 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 55,129 psi | 86% | 3104 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,116 psi | 90% | 3127 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,203 psi | 90% | 3094 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,259 psi | 87% | 3120 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,186 psi | 85% | 3114 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,536 psi | 89% | 2976 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,594 psi | 89% | 3077 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,027 psi | 86% | 3179 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 55,970 psi | 88% | 3100 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,217 psi | 88% | 3107 fps | 97.5% |
| Somchem S365 | <<locked>> | 90% | 54,520 psi | 85% | 3146 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,217 psi | 88% | 3159 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 57,392 psi | 90% | 3074 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,376 psi | 88% | 3133 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,666 psi | 87% | 3133 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 55,405 psi | 87% | 3136 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 57,377 psi | 90% | 3212 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 53,925 psi | 85% | 3222 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,461 psi | 84% | 3192 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,072 psi | 88% | 3091 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,215 psi | 85% | 3159 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,086 psi | 88% | 3327 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,159 psi | 88% | 3150 fps | 99% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 31,502 psi | 49% | 2631 fps | 95.2% |
| Accurate 4350 | <<locked>> | 80% | 42,511 psi | 67% | 2920 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 49,255 psi | 77% | 3133 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 50,734 psi | 80% | 3015 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,683 psi | 64% | 2897 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 90% | 44,396 psi | 70% | 3009 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 98% | 42,670 psi | 67% | 2956 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 35,563 psi | 56% | 2841 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,605 psi | 81% | 3038 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,799 psi | 64% | 2927 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,978 psi | 74% | 3058 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,509 psi | 63% | 2890 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,522 psi | 60% | 2884 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,168 psi | 47% | 2664 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,168 psi | 47% | 2677 fps | 95% |
| Alliant Reloder-26 | 61.4 gr | 80% | 32,808 psi | 51% | 2799 fps | 97.3% |
| Bofors RP15 | <<locked>> | 90% | 40,770 psi | 64% | 2936 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 52,518 psi | 82% | 3054 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 40,872 psi | 64% | 2969 fps | 95.1% |
| Bofors RP5 | <<locked>> | 86% | 38,522 psi | 60% | 2884 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 45,614 psi | 71% | 2927 fps | 98% |
| Hodgdon H1000 | <<locked>> | 94% | 40,828 psi | 64% | 2917 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 52,591 psi | 82% | 3074 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,295 psi | 69% | 2969 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 46,920 psi | 74% | 2989 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 47,500 psi | 74% | 3015 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,601 psi | 73% | 2999 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,377 psi | 60% | 2805 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,232 psi | 60% | 2956 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 43,526 psi | 68% | 2986 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 43% | 1775 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,345 psi | 84% | 3051 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,263 psi | 65% | 2848 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,079 psi | 74% | 2956 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 40,524 psi | 64% | 2861 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,093 psi | 72% | 2953 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 92% | 45,484 psi | 71% | 3045 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 53,708 psi | 84% | 3041 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,556 psi | 70% | 2900 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 43,004 psi | 67% | 2887 fps | 98.1% |
| Lovex S071 | <<locked>> | 86% | 32,909 psi | 52% | 2671 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 40,915 psi | 64% | 2877 fps | 95.5% |
| Norma MRP | 61 gr | 82% | 35,099 psi | 55% | 2828 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 41,916 psi | 66% | 2907 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 42,250 psi | 66% | 2986 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 40,611 psi | 64% | 2894 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 37,840 psi | 59% | 2854 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 44% | 1821 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,460 psi | 82% | 3058 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,835 psi | 78% | 3110 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,308 psi | 66% | 2936 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,727 psi | 64% | 2949 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,128 psi | 55% | 2861 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 49,530 psi | 78% | 3002 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,005 psi | 71% | 2936 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 84% | 39,842 psi | 62% | 2874 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 45,614 psi | 71% | 2927 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,556 psi | 70% | 2900 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 53,708 psi | 84% | 3041 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,004 psi | 67% | 2887 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,662 psi | 79% | 3058 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,995 psi | 78% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,685 psi | 68% | 2844 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,494 psi | 62% | 2867 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 49,342 psi | 77% | 2995 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,122 psi | 72% | 2923 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 38,624 psi | 61% | 2861 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,782 psi | 59% | 2792 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 47,384 psi | 74% | 2917 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,308 psi | 68% | 2904 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 37,449 psi | 59% | 2776 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 42,670 psi | 67% | 2904 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 33,881 psi | 53% | 2749 fps | 98.3% |
| Vihtavuori N560 | 67 gr | 90% | 46,862 psi | 73% | 3084 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 94% | 43,482 psi | 68% | 2995 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,279 psi | 66% | 2864 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,295 psi | 69% | 2969 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,789 psi | 42% | 2651 fps | 97.9% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,813 psi | 62% | 2838 fps | 95.4% |
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 85 powders for .270 Weath. Mag. loaded with the .277 | 130gr | Winchester Silvertip. Winchester StaBALL HD delivers the highest muzzle velocity at 3,327 fps; across all powders the maximum-charge window runs from 1,985 fps to 3,327 fps. ADI AR 2217 gives the best case fill at 100 %, and 85 of the 85 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.277" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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 .270 Weath. Mag. with the .277 | 130gr | Winchester Silvertip they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, ReloadSwiss RS 80, Vihtavuori N170 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.