Load Specifications
Load data in caliber .270 Win. with .277 | 180gr | Barnes RNSP bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Alliant Reloder-26 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 55,869 psi | 90% | 2572 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,273 psi | 87% | 2556 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,201 psi | 87% | 2657 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 84% | 56,362 psi | 90% | 2520 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,042 psi | 88% | 2608 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 98% | 56,173 psi | 90% | 2657 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 43,787 psi | 70% | 2454 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,783 psi | 62% | 2418 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,969 psi | 87% | 2497 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,027 psi | 88% | 2605 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,246 psi | 90% | 2621 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,244 psi | 87% | 2592 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,637 psi | 89% | 2654 fps | 99.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,333 psi | 90% | 2625 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,776 psi | 78% | 2582 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 52,823 psi | 85% | 2664 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 54,940 psi | 88% | 2572 fps | 95.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,462 psi | 87% | 2638 fps | 99.4% |
| Bofors RP3 | <<locked>> | 82% | 54,752 psi | 88% | 2510 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,686 psi | 72% | 2520 fps | 97.5% |
| Bofors RP5 | <<locked>> | 98% | 55,637 psi | 89% | 2654 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 53,867 psi | 86% | 2507 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,109 psi | 77% | 2533 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 82% | 54,969 psi | 88% | 2530 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,028 psi | 90% | 2605 fps | 100% |
| Hodgdon H4350 | <<locked>> | 86% | 55,564 psi | 89% | 2566 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 96% | 56,202 psi | 90% | 2602 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,172 psi | 88% | 2589 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,259 psi | 89% | 2533 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,834 psi | 77% | 2635 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 88% | 56,405 psi | 90% | 2644 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,956 psi | 59% | 1558 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,709 psi | 89% | 2500 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,143 psi | 88% | 2543 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,361 psi | 89% | 2530 fps | 99.9% |
| IMR 4831 | <<locked>> | 90% | 54,766 psi | 88% | 2549 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,302 psi | 87% | 2543 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 98% | 53,577 psi | 86% | 2635 fps | 98.6% |
| Lovex S062 | <<locked>> | 82% | 56,057 psi | 90% | 2493 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,999 psi | 90% | 2530 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 53,969 psi | 87% | 2526 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,676 psi | 80% | 2487 fps | 99.9% |
| Norma 204 | <<locked>> | 90% | 55,999 psi | 90% | 2595 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 34,389 psi | 55% | 2352 fps | 96.2% |
| Norma MRP | <<locked>> | 96% | 55,317 psi | 89% | 2677 fps | 100% |
| Norma URP | <<locked>> | 90% | 56,217 psi | 90% | 2585 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,346 psi | 87% | 2657 fps | 99% |
| Ramshot Hunter | <<locked>> | 90% | 55,201 psi | 89% | 2595 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,054 psi | 83% | 2595 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,579 psi | 60% | 1594 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,650 psi | 88% | 2520 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,535 psi | 89% | 2605 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,143 psi | 87% | 2579 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,188 psi | 90% | 2657 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,747 psi | 77% | 2628 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 54,940 psi | 88% | 2510 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,405 psi | 90% | 2575 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 94% | 53,925 psi | 86% | 2585 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 86% | 53,867 psi | 86% | 2507 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,999 psi | 90% | 2530 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 56,057 psi | 90% | 2493 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 53,969 psi | 87% | 2526 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,420 psi | 90% | 2566 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,347 psi | 89% | 2392 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,288 psi | 89% | 2490 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,476 psi | 86% | 2582 fps | 99.3% |
| Somchem S355 | <<locked>> | 84% | 54,766 psi | 88% | 2503 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,375 psi | 87% | 2523 fps | 97.9% |
| Somchem S365 | <<locked>> | 92% | 56,246 psi | 90% | 2589 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,375 psi | 87% | 2562 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 86% | 56,014 psi | 90% | 2480 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,853 psi | 88% | 2536 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,621 psi | 86% | 2543 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 88% | 53,809 psi | 86% | 2539 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,376 psi | 89% | 2605 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,419 psi | 89% | 2674 fps | 98.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,039 psi | 82% | 2598 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,041 psi | 87% | 2500 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,376 psi | 90% | 2608 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,794 psi | 85% | 2703 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,157 psi | 87% | 2556 fps | 99.3% |
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% | 30,763 psi | 49% | 2139 fps | 96.4% |
| Accurate 4350 | <<locked>> | 80% | 41,553 psi | 67% | 2362 fps | 99.9% |
| Accurate MAGPRO | 51.8 gr | 90% | 43,859 psi | 70% | 2487 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 49,908 psi | 80% | 2431 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 37,217 psi | 60% | 2297 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 88% | 40,321 psi | 65% | 2388 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 98% | 40,973 psi | 66% | 2398 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 94% | 32,097 psi | 51% | 2257 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,618 psi | 81% | 2451 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,885 psi | 64% | 2365 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,658 psi | 73% | 2474 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 34,853 psi | 56% | 2247 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 84% | 34,954 psi | 56% | 2290 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,530 psi | 47% | 2165 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 27,630 psi | 44% | 2126 fps | 95.3% |
| Alliant Reloder-26 | 46.6 gr | 80% | 31,676 psi | 51% | 2274 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 51,822 psi | 83% | 2523 fps | 95.1% |
| Bofors RP15 | <<locked>> | 88% | 37,101 psi | 59% | 2336 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 51,300 psi | 82% | 2464 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 39,102 psi | 63% | 2415 fps | 95.8% |
| Bofors RP5 | <<locked>> | 84% | 34,954 psi | 56% | 2290 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 44,976 psi | 72% | 2369 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 94% | 39,378 psi | 63% | 2369 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 51,503 psi | 83% | 2484 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,236 psi | 69% | 2405 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 45,905 psi | 74% | 2418 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 88% | 43,062 psi | 69% | 2395 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 42,279 psi | 68% | 2382 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,492 psi | 60% | 2267 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 34,606 psi | 55% | 2349 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 42,148 psi | 68% | 2425 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,557 psi | 44% | 1388 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,533 psi | 84% | 2457 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,350 psi | 65% | 2303 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,108 psi | 74% | 2388 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 39,711 psi | 64% | 2316 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 42,409 psi | 68% | 2346 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 90% | 41,307 psi | 66% | 2421 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 52,924 psi | 85% | 2451 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,772 psi | 70% | 2346 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 42,134 psi | 68% | 2336 fps | 98.7% |
| Lovex S071 | <<locked>> | 82% | 28,181 psi | 45% | 2073 fps | 95.2% |
| Norma 204 | <<locked>> | 80% | 40,089 psi | 64% | 2336 fps | 96.5% |
| Norma 217 | <<locked>> | 98% | 32,184 psi | 52% | 2297 fps | 95.2% |
| Norma MRP | 45.2 gr | 80% | 31,792 psi | 51% | 2244 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 40,944 psi | 66% | 2352 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 38,043 psi | 61% | 2369 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 39,740 psi | 64% | 2349 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 33,794 psi | 54% | 2264 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,181 psi | 45% | 1424 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,329 psi | 82% | 2470 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,472 psi | 78% | 2513 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,104 psi | 66% | 2379 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,639 psi | 64% | 2392 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 31,531 psi | 51% | 2274 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 48,486 psi | 78% | 2421 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 38,653 psi | 62% | 2280 fps | 95% |
| Rottweil R 905 | <<locked>> | 82% | 36,289 psi | 58% | 2280 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 44,976 psi | 72% | 2369 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,772 psi | 70% | 2346 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 52,924 psi | 85% | 2451 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,134 psi | 68% | 2336 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,690 psi | 80% | 2470 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,139 psi | 79% | 2316 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,714 psi | 68% | 2297 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 35,955 psi | 58% | 2277 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 48,486 psi | 78% | 2415 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 41,930 psi | 67% | 2323 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 37,536 psi | 60% | 2313 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,490 psi | 55% | 2218 fps | 96% |
| Vihtavuori N150 | <<locked>> | 80% | 46,398 psi | 74% | 2352 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,467 psi | 68% | 2349 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 33,968 psi | 54% | 2201 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 41,713 psi | 67% | 2352 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 32,967 psi | 53% | 2231 fps | 99.1% |
| Vihtavuori N560 | <<locked>> | 88% | 42,322 psi | 68% | 2454 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 41,553 psi | 67% | 2434 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,292 psi | 66% | 2320 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,236 psi | 69% | 2405 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,165 psi | 42% | 2169 fps | 99% |
| Winchester Supreme 780 | <<locked>> | 84% | 36,056 psi | 58% | 2251 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 81 powders for .270 Win. loaded with the .277 | 180gr | Barnes RNSP. Winchester StaBALL HD delivers the highest muzzle velocity at 2,703 fps; across all powders the maximum-charge window runs from 1,558 fps to 2,703 fps. ADI AR 2217 gives the best case fill at 100 %, and 81 of the 81 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.277" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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. Accurate MAGPRO, Alliant Reloder-26, Norma MRP rank at the top here: for .270 Win. with the .277 | 180gr | Barnes RNSP 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.