Load Specifications
Bullet:.277 | 150gr | Barnes TSX FB
Bullet Manufacturer:Barnes
Bullet Weight:150 gr
Bullet Diameter:0.277"
Bullet Length:<<locked>>
Caliber:.270 Weath. Mag. load data
Case Length (l3):2.549"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:82 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:26"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:9.5
Load data in caliber .270 Weath. Mag. with .277 | 150gr | Barnes TSX FB bullet and 84 powders. The key underlying parameters are shown in the table above.
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% | 2917 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,028 psi | 88% | 2953 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 56,130 psi | 88% | 3077 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 96% | 57,072 psi | 89% | 3077 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 82% | 54,418 psi | 85% | 2867 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,392 psi | 90% | 3018 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 96% | 54,853 psi | 86% | 3018 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,600 psi | 71% | 2844 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,379 psi | 63% | 2802 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 57,392 psi | 90% | 3012 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,477 psi | 87% | 2887 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,232 psi | 90% | 3012 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,636 psi | 86% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,637 psi | 89% | 3005 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,520 psi | 85% | 3012 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,419 psi | 87% | 2979 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,227 psi | 80% | 2986 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,782 psi | 87% | 3074 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 57,188 psi | 90% | 2979 fps | 96.6% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,043 psi | 89% | 3051 fps | 99.7% |
| Bofors RP3 | <<locked>> | 82% | 56,420 psi | 88% | 2904 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,152 psi | 74% | 2920 fps | 98.1% |
| Bofors RP5 | <<locked>> | 96% | 54,520 psi | 85% | 3012 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 55,564 psi | 87% | 2907 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,444 psi | 79% | 2936 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 82% | 56,376 psi | 88% | 2923 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,476 psi | 85% | 2956 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 86% | 57,348 psi | 90% | 2969 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 94% | 55,013 psi | 86% | 2959 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,580 psi | 90% | 2999 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,479 psi | 90% | 2930 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,125 psi | 79% | 3048 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 86% | 54,868 psi | 86% | 2995 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,883 psi | 58% | 1827 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,319 psi | 90% | 2897 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,942 psi | 89% | 2943 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,043 psi | 89% | 2930 fps | 100% |
| IMR 4831 | <<locked>> | 90% | 56,666 psi | 89% | 2946 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,275 psi | 88% | 2943 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 98% | 56,260 psi | 88% | 3054 fps | 99.1% |
| Lovex S062 | <<locked>> | 82% | 57,508 psi | 90% | 2887 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,508 psi | 90% | 2923 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,463 psi | 87% | 2920 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 88% | 54,215 psi | 85% | 2943 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 35,679 psi | 56% | 2717 fps | 96.8% |
| Norma MRP | <<locked>> | 94% | 54,288 psi | 85% | 3035 fps | 100% |
| Norma URP | <<locked>> | 88% | 54,752 psi | 86% | 2940 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,116 psi | 90% | 3077 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 90% | 57,377 psi | 90% | 3002 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,100 psi | 86% | 3005 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,565 psi | 59% | 1870 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,173 psi | 88% | 2913 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,070 psi | 85% | 2959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,202 psi | 88% | 2979 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,607 psi | 86% | 3012 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,560 psi | 79% | 3048 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 45,455 psi | 71% | 2920 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 84% | 56,565 psi | 89% | 2900 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,911 psi | 86% | 2927 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 94% | 55,956 psi | 88% | 2989 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 86% | 55,564 psi | 87% | 2907 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,508 psi | 90% | 2923 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,508 psi | 90% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,463 psi | 87% | 2920 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,491 psi | 85% | 2910 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,956 psi | 89% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,000 psi | 89% | 2881 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,506 psi | 87% | 2986 fps | 99.6% |
| Somchem S355 | <<locked>> | 84% | 56,318 psi | 88% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,420 psi | 88% | 2920 fps | 98.4% |
| Somchem S365 | <<locked>> | 90% | 54,752 psi | 86% | 2936 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,550 psi | 89% | 2963 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 86% | 57,696 psi | 90% | 2867 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,637 psi | 89% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,898 psi | 88% | 2940 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 55,782 psi | 87% | 2936 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,143 psi | 85% | 2956 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,288 psi | 85% | 3028 fps | 98.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,490 psi | 84% | 3002 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,492 psi | 89% | 2890 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,766 psi | 86% | 2963 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,623 psi | 89% | 3120 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,782 psi | 89% | 2963 fps | 99.6% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 31,125 psi | 49% | 2461 fps | 96.4% |
| Accurate 4350 | <<locked>> | 80% | 42,366 psi | 66% | 2726 fps | 99.9% |
| Accurate High Country | <<locked>> | 84% | 39,262 psi | 62% | 2753 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 88% | 42,801 psi | 67% | 2818 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 51,082 psi | 80% | 2815 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 35,795 psi | 56% | 2602 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 88% | 41,800 psi | 66% | 2772 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 96% | 39,856 psi | 62% | 2720 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 92% | 31,096 psi | 49% | 2552 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 35,911 psi | 56% | 2602 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,054 psi | 82% | 2838 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,118 psi | 64% | 2743 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,253 psi | 74% | 2861 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 35,592 psi | 56% | 2595 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 84% | 36,114 psi | 57% | 2651 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,197 psi | 47% | 2500 fps | 99.2% |
| Alliant Reloder-25 | <<locked>> | 82% | 28,181 psi | 44% | 2457 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,663 psi | 51% | 2628 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 50,430 psi | 79% | 2864 fps | 95% |
| Bofors RP15 | <<locked>> | 86% | 35,824 psi | 56% | 2641 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 52,605 psi | 82% | 2851 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 38,232 psi | 60% | 2733 fps | 95.6% |
| Bofors RP5 | <<locked>> | 84% | 36,114 psi | 57% | 2651 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 45,876 psi | 72% | 2740 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 92% | 38,276 psi | 60% | 2687 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 52,852 psi | 83% | 2871 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,411 psi | 70% | 2782 fps | 99% |
| Hodgdon H4350 | <<locked>> | 80% | 47,181 psi | 74% | 2799 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 86% | 41,684 psi | 65% | 2713 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 88% | 43,874 psi | 69% | 2759 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,537 psi | 60% | 2621 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 35,868 psi | 56% | 2723 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 43,787 psi | 69% | 2805 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 43% | 1631 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,766 psi | 84% | 2844 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,495 psi | 65% | 2671 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,297 psi | 74% | 2769 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 40,611 psi | 64% | 2677 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 40,828 psi | 64% | 2657 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 88% | 39,987 psi | 63% | 2743 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 53,969 psi | 85% | 2835 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,715 psi | 70% | 2713 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 43,018 psi | 67% | 2703 fps | 98.9% |
| Lovex S071 | <<locked>> | 82% | 28,587 psi | 45% | 2392 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 41,249 psi | 65% | 2703 fps | 96.9% |
| Norma 217 | <<locked>> | 98% | 33,373 psi | 52% | 2654 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 32,677 psi | 51% | 2592 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 42,076 psi | 66% | 2723 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 39,465 psi | 62% | 2746 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 40,944 psi | 64% | 2717 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 32,677 psi | 51% | 2559 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,137 psi | 44% | 1673 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,736 psi | 83% | 2858 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,198 psi | 79% | 2904 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,540 psi | 67% | 2753 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,944 psi | 64% | 2769 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 32,692 psi | 51% | 2631 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 41,930 psi | 66% | 2848 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 49,617 psi | 78% | 2799 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 39,668 psi | 62% | 2641 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 80% | 34,722 psi | 54% | 2575 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 45,876 psi | 72% | 2740 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,715 psi | 70% | 2713 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 53,969 psi | 85% | 2835 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,018 psi | 67% | 2703 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,140 psi | 80% | 2861 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,270 psi | 79% | 2680 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,787 psi | 69% | 2661 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,057 psi | 58% | 2635 fps | 96% |
| Somchem S355 | <<locked>> | 80% | 49,588 psi | 78% | 2795 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 43,149 psi | 68% | 2687 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 38,856 psi | 61% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,302 psi | 55% | 2562 fps | 96.3% |
| Vihtavuori N150 | <<locked>> | 80% | 47,514 psi | 74% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,352 psi | 68% | 2713 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 34,983 psi | 55% | 2549 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 42,830 psi | 67% | 2720 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 33,736 psi | 53% | 2575 fps | 99.1% |
| Vihtavuori N560 | <<locked>> | 86% | 40,988 psi | 64% | 2779 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 92% | 40,524 psi | 64% | 2756 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,627 psi | 67% | 2680 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,628 psi | 70% | 2785 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,643 psi | 42% | 2500 fps | 99.2% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,188 psi | 58% | 2605 fps | 95.8% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 84 powders for .270 Weath. Mag. loaded with the .277 | 150gr | Barnes TSX FB. Winchester StaBALL HD delivers the highest muzzle velocity at 3,120 fps; across all powders the maximum-charge window runs from 1,827 fps to 3,120 fps. ADI AR 2217 gives the best case fill at 100 %, and 84 of the 84 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 150.0 gr projectile in 0.277" calls for a 1:9.5 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.