Load Specifications
Load data in caliber .277 Fury Commercial with .277 | 150gr | Speer Grand Slam bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 and Ramshot Big Game.
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: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 55,608 psi | 88% | 2448 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,215 psi | 86% | 2474 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 56,782 psi | 90% | 2507 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 56,057 psi | 89% | 2530 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 56,463 psi | 89% | 2543 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 48,544 psi | 77% | 2503 fps | 97.6% |
| Accurate LT-30 | <<locked>> | 82% | 55,100 psi | 87% | 2398 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,506 psi | 88% | 2421 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,592 psi | 87% | 2530 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 96% | 55,477 psi | 88% | 2523 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 82% | 55,840 psi | 89% | 2507 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 53,969 psi | 86% | 2490 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 88% | 53,925 psi | 85% | 2477 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,811 psi | 88% | 2585 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 53,983 psi | 86% | 2625 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 54,853 psi | 87% | 2543 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,492 psi | 88% | 2454 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 56,014 psi | 89% | 2566 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,776 psi | 76% | 2503 fps | 97.6% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 55,419 psi | 88% | 2648 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,215 psi | 86% | 2398 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 54,215 psi | 86% | 2539 fps | 98.6% |
| Bofors RP3 | <<locked>> | 96% | 55,405 psi | 88% | 2559 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 88% | 56,231 psi | 89% | 2484 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 56,304 psi | 89% | 2562 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 54,723 psi | 87% | 2602 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 84% | 54,534 psi | 86% | 2490 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,622 psi | 88% | 2513 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 56,768 psi | 90% | 2569 fps | 98.4% |
| Hodgdon H4895 | <<locked>> | 90% | 55,056 psi | 87% | 2536 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,150 psi | 70% | 2405 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 53,824 psi | 85% | 2566 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,012 psi | 55% | 1512 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,463 psi | 89% | 2543 fps | 99.7% |
| IMR 3031 | <<locked>> | 90% | 54,723 psi | 87% | 2533 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 54,998 psi | 87% | 2510 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,651 psi | 88% | 2490 fps | 96.1% |
| IMR 4198 | <<locked>> | 84% | 55,782 psi | 88% | 2418 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 54,694 psi | 87% | 2503 fps | 95.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,137 psi | 73% | 2448 fps | 97.2% |
| IMR 4895 | <<locked>> | 92% | 53,563 psi | 85% | 2543 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 88% | 53,969 psi | 86% | 2490 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 84% | 54,172 psi | 86% | 2480 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 53,751 psi | 85% | 2510 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 54,694 psi | 87% | 2467 fps | 99.4% |
| Lovex S062 | <<locked>> | 94% | 54,534 psi | 86% | 2507 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 53,505 psi | 85% | 2497 fps | 97.2% |
| Norma 201 | <<locked>> | 92% | 56,724 psi | 90% | 2526 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 53,780 psi | 85% | 2487 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,114 psi | 87% | 2556 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 48,399 psi | 77% | 2497 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 94% | 55,521 psi | 88% | 2579 fps | 99.4% |
| Ramshot TAC | <<locked>> | 88% | 54,288 psi | 86% | 2500 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 90% | 56,971 psi | 90% | 2566 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,274 psi | 88% | 2493 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,491 psi | 56% | 1549 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 53,461 psi | 85% | 2474 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 53,896 psi | 85% | 2503 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 56,144 psi | 89% | 2625 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 55,593 psi | 88% | 2657 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,283 psi | 77% | 2523 fps | 97.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,168 psi | 78% | 2539 fps | 96.6% |
| Rottweil R 901 | <<locked>> | 88% | 54,592 psi | 87% | 2474 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 53,896 psi | 85% | 2480 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 98% | 55,347 psi | 88% | 2552 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 53,505 psi | 85% | 2497 fps | 97.2% |
| Shooters World Match Rifle | <<locked>> | 90% | 53,751 psi | 85% | 2510 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,534 psi | 86% | 2507 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 56,971 psi | 90% | 2497 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 56,144 psi | 89% | 2516 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 57,029 psi | 90% | 2605 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 56,550 psi | 90% | 2474 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 56,101 psi | 89% | 2530 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 56,637 psi | 90% | 2552 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 55,463 psi | 88% | 2438 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 54,984 psi | 87% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 54,186 psi | 86% | 2457 fps | 95.8% |
| Somchem S321 | <<locked>> | 86% | 55,317 psi | 88% | 2526 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 54,491 psi | 86% | 2434 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 55,448 psi | 88% | 2523 fps | 99.4% |
| Somchem S355 | <<locked>> | 98% | 55,593 psi | 88% | 2546 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,105 psi | 68% | 2451 fps | 99.2% |
| Vihtavuori N130 | <<locked>> | 86% | 55,477 psi | 88% | 2411 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,434 psi | 88% | 2425 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 56,608 psi | 90% | 2500 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 54,157 psi | 86% | 2470 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 53,983 psi | 86% | 2490 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,836 psi | 81% | 2497 fps | 97.8% |
| Vihtavuori N530 | <<locked>> | 88% | 54,491 psi | 86% | 2490 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 94% | 55,898 psi | 89% | 2510 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,864 psi | 79% | 2500 fps | 97.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,750 psi | 82% | 2487 fps | 99.4% |
| Winchester 748 | <<locked>> | 88% | 53,838 psi | 85% | 2533 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 92% | 56,318 psi | 89% | 2559 fps | 99.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 43,627 psi | 69% | 2283 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,558 psi | 75% | 2382 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,100 psi | 57% | 2205 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,525 psi | 67% | 2336 fps | 99.6% |
| Accurate 4064 | <<locked>> | 80% | 34,127 psi | 54% | 2188 fps | 99% |
| Accurate 4350 | <<locked>> | 94% | 39,610 psi | 63% | 2349 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 51,808 psi | 82% | 2356 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,214 psi | 83% | 2379 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,972 psi | 63% | 2287 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 84% | 38,740 psi | 61% | 2251 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 52,446 psi | 83% | 2461 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,974 psi | 67% | 2300 fps | 98.5% |
| Alliant AR-Comp | <<locked>> | 80% | 41,640 psi | 66% | 2310 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,747 psi | 77% | 2480 fps | 99.1% |
| Alliant Power Pro 2000-MR | 35.7 gr | 82% | 38,464 psi | 61% | 2343 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,330 psi | 53% | 2172 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,298 psi | 78% | 2372 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 38,159 psi | 60% | 2270 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 94% | 40,147 psi | 64% | 2362 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 86% | 34,940 psi | 55% | 2274 fps | 95.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,836 psi | 81% | 2356 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,856 psi | 62% | 2283 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 32,677 psi | 52% | 2169 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,961 psi | 70% | 2300 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,451 psi | 64% | 2320 fps | 98.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,295 psi | 70% | 2438 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 80% | 48,022 psi | 76% | 2398 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,820 psi | 77% | 2421 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 40,901 psi | 65% | 2316 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 40,263 psi | 64% | 2297 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 34,345 psi | 54% | 2215 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,230 psi | 57% | 2264 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,904 psi | 41% | 1345 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,740 psi | 61% | 2257 fps | 97% |
| IMR 3031 | <<locked>> | 80% | 39,436 psi | 63% | 2303 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,868 psi | 57% | 2185 fps | 95% |
| IMR 4166 Enduron | <<locked>> | 90% | 52,431 psi | 83% | 2444 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 49,501 psi | 78% | 2336 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 51,517 psi | 82% | 2461 fps | 95.1% |
| IMR 4831 | <<locked>> | 96% | 40,611 psi | 64% | 2352 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 36,651 psi | 58% | 2251 fps | 95.9% |
| IMR 8208 XBR | <<locked>> | 80% | 41,974 psi | 67% | 2300 fps | 98.5% |
| Lovex D073.5 | <<locked>> | 80% | 47,152 psi | 75% | 2382 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 38,508 psi | 61% | 2274 fps | 99.1% |
| Lovex S060 | <<locked>> | 80% | 40,495 psi | 64% | 2238 fps | 97.1% |
| Lovex S062 | <<locked>> | 80% | 35,447 psi | 56% | 2188 fps | 97% |
| Lovex S065 | <<locked>> | 94% | 44,599 psi | 71% | 2359 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 39,247 psi | 62% | 2251 fps | 98% |
| Norma 202 | <<locked>> | 80% | 39,421 psi | 62% | 2267 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 35,201 psi | 56% | 2211 fps | 95.4% |
| Norma URP | <<locked>> | 94% | 39,755 psi | 63% | 2346 fps | 95.1% |
| Ramshot Big Game | 35.7 gr | 82% | 36,956 psi | 59% | 2270 fps | 95.6% |
| Ramshot TAC | <<locked>> | 82% | 44,831 psi | 71% | 2352 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,191 psi | 65% | 2320 fps | 97.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,339 psi | 72% | 2346 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,121 psi | 41% | 1375 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,282 psi | 75% | 2385 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 47,413 psi | 75% | 2402 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 37,101 psi | 59% | 2306 fps | 95.3% |
| ReloadSwiss RS 60 | 34.3 gr | 80% | 30,560 psi | 48% | 2175 fps | 96.1% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 42,206 psi | 67% | 2418 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 45,890 psi | 73% | 2480 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 43,178 psi | 68% | 2300 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 37,536 psi | 59% | 2211 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 32,851 psi | 52% | 2165 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 44,599 psi | 71% | 2359 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,508 psi | 61% | 2274 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 35,447 psi | 56% | 2188 fps | 97% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,966 psi | 79% | 2402 fps | 99.4% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,837 psi | 84% | 2470 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 36,260 psi | 57% | 2260 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,821 psi | 79% | 2388 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 42,786 psi | 68% | 2323 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,537 psi | 61% | 2260 fps | 96.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,712 psi | 65% | 2221 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,576 psi | 53% | 2100 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 50,734 psi | 80% | 2411 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 45,092 psi | 71% | 2372 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 40,335 psi | 64% | 2228 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 39,566 psi | 63% | 2274 fps | 96.6% |
| Somchem S355 | <<locked>> | 82% | 33,823 psi | 54% | 2175 fps | 95.4% |
| Somchem S365 | <<locked>> | 90% | 31,357 psi | 50% | 2198 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 46,079 psi | 73% | 2287 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,872 psi | 65% | 2224 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,289 psi | 58% | 2201 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,333 psi | 59% | 2211 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 30,226 psi | 48% | 2077 fps | 95.6% |
| Vihtavuori N160 | <<locked>> | 94% | 42,090 psi | 67% | 2356 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 42,032 psi | 67% | 2300 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 80% | 35,694 psi | 57% | 2192 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 94% | 41,089 psi | 65% | 2352 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 34,853 psi | 55% | 2192 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 41,249 psi | 65% | 2339 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,724 psi | 60% | 2260 fps | 96.8% |
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 94 powders for .277 Fury Commercial loaded with the .277 | 150gr | Speer Grand Slam. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,657 fps; across all powders the maximum-charge window runs from 1,512 fps to 2,657 fps. Accurate 4350 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.277" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 Power Pro 2000-MR, ReloadSwiss RS 60, Ramshot Big Game rank at the top here: for .277 Fury Commercial with the .277 | 150gr | Speer Grand Slam 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.