
Load Specifications
Load data in caliber 9.3 x 66 Sako with .366 | 250gr | Swift A-Frame bullet and 93 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 52 and Hodgdon CFE223.
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 2015 | <<locked>> | 90% | 52,997 psi | 88% | 2490 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 53,447 psi | 89% | 2569 fps | 98.6% |
| Accurate 2230 | <<locked>> | 82% | 54,288 psi | 90% | 2582 fps | 98.9% |
| Accurate 2460 | <<locked>> | 86% | 51,329 psi | 85% | 2510 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 53,098 psi | 88% | 2543 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 54,346 psi | 90% | 2595 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 54,346 psi | 90% | 2595 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 52,489 psi | 87% | 2575 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 41,423 psi | 69% | 2467 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 84% | 53,635 psi | 89% | 2444 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 54,027 psi | 90% | 2464 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 51,880 psi | 86% | 2562 fps | 99% |
| ADI AR 2208 | <<locked>> | 98% | 52,707 psi | 88% | 2556 fps | 98.6% |
| ADI AR 2219 | <<locked>> | 84% | 53,722 psi | 89% | 2552 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 51,372 psi | 85% | 2526 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 92% | 53,940 psi | 90% | 2556 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 52,794 psi | 88% | 2621 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 51,184 psi | 85% | 2654 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 51,750 psi | 86% | 2579 fps | 99.5% |
| Alliant Reloder-10x | <<locked>> | 86% | 53,098 psi | 88% | 2497 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 52,634 psi | 87% | 2595 fps | 98.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 42,569 psi | 71% | 2477 fps | 96% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,675 psi | 81% | 2618 fps | 99% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 52,431 psi | 87% | 2444 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 51,271 psi | 85% | 2572 fps | 98.1% |
| Bofors RP3 | <<locked>> | 98% | 51,764 psi | 86% | 2589 fps | 99.6% |
| Hodgdon Benchmark | <<locked>> | 90% | 53,969 psi | 90% | 2520 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 92% | 53,200 psi | 88% | 2598 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 88% | 51,430 psi | 85% | 2631 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 88% | 51,343 psi | 85% | 2523 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 52,678 psi | 88% | 2552 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 53,693 psi | 89% | 2595 fps | 97.8% |
| Hodgdon H4198 | <<locked>> | 82% | 52,243 psi | 87% | 2444 fps | 100% |
| Hodgdon H4895 | <<locked>> | 92% | 52,286 psi | 87% | 2572 fps | 99.4% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,769 psi | 64% | 2375 fps | 96.7% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 53,838 psi | 89% | 2644 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,345 psi | 57% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 52,518 psi | 87% | 2559 fps | 99.3% |
| IMR 3031 | <<locked>> | 96% | 52,692 psi | 88% | 2585 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 51,343 psi | 85% | 2526 fps | 98.6% |
| IMR 4198 | <<locked>> | 86% | 53,911 psi | 90% | 2464 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 53,911 psi | 90% | 2625 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 90% | 51,372 psi | 85% | 2526 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 86% | 51,300 psi | 85% | 2516 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 94% | 54,056 psi | 90% | 2592 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 52,591 psi | 87% | 2503 fps | 99% |
| Lovex S062 | <<locked>> | 96% | 51,532 psi | 86% | 2543 fps | 99.7% |
| Norma 200 | <<locked>> | 82% | 53,258 psi | 88% | 2474 fps | 100% |
| Norma 201 | <<locked>> | 94% | 53,969 psi | 90% | 2562 fps | 99.8% |
| Norma 202 | <<locked>> | 94% | 54,186 psi | 90% | 2569 fps | 100% |
| Norma 203B | <<locked>> | 96% | 51,692 psi | 86% | 2582 fps | 99% |
| Norma URPᴾ | <<locked>> | 100% | 42,250 psi | 70% | 2467 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 96% | 51,837 psi | 86% | 2605 fps | 98.9% |
| Ramshot TAC | <<locked>> | 90% | 52,040 psi | 86% | 2536 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 92% | 54,288 psi | 90% | 2605 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 88% | 52,910 psi | 88% | 2530 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,548 psi | 57% | 1558 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 51,430 psi | 85% | 2520 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 54,375 psi | 90% | 2575 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 52,098 psi | 87% | 2651 fps | 98.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 52,011 psi | 86% | 2684 fps | 100% |
| Rottweil R 901 | <<locked>> | 90% | 52,170 psi | 87% | 2510 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 54,317 psi | 90% | 2556 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 51,372 psi | 85% | 2575 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 94% | 54,056 psi | 90% | 2592 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 51,532 psi | 86% | 2543 fps | 99.7% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 51,184 psi | 85% | 2487 fps | 99.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 54,462 psi | 90% | 2221 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 53,954 psi | 90% | 2562 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 53,432 psi | 89% | 2635 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 54,244 psi | 90% | 2516 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 53,345 psi | 89% | 2559 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 53,635 psi | 89% | 2585 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 53,185 psi | 88% | 2474 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 52,533 psi | 87% | 2470 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 52,504 psi | 87% | 2562 fps | 99.8% |
| Somchem S335 | <<locked>> | 92% | 51,967 psi | 86% | 2474 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 52,460 psi | 87% | 2552 fps | 98.9% |
| Somchem S355ᴾ | <<locked>> | 100% | 52,301 psi | 87% | 2575 fps | 99.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,463 psi | 62% | 2418 fps | 97.9% |
| Unknown powderᴾ | <<locked>> | 100% | 46,572 psi | 77% | 2530 fps | 96.1% |
| Vihtavuori N130 | <<locked>> | 88% | 53,258 psi | 88% | 2451 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 52,968 psi | 88% | 2464 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 53,200 psi | 88% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 51,459 psi | 85% | 2510 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 50,546 psi | 84% | 2520 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 44,643 psi | 74% | 2474 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 90% | 51,967 psi | 86% | 2526 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 96% | 52,939 psi | 88% | 2549 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 43,468 psi | 72% | 2474 fps | 95.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,035 psi | 76% | 2464 fps | 98.4% |
| Winchester 748 | <<locked>> | 88% | 51,576 psi | 86% | 2582 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 51,517 psi | 86% | 2569 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 2015 | <<locked>> | 80% | 39,059 psi | 65% | 2283 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,067 psi | 83% | 2520 fps | 98.1% |
| Accurate 2230 | <<locked>> | 80% | 50,604 psi | 84% | 2530 fps | 98.4% |
| Accurate 2460 | <<locked>> | 80% | 42,148 psi | 70% | 2372 fps | 99.7% |
| Accurate 2495 | <<locked>> | 80% | 31,459 psi | 52% | 2195 fps | 99.8% |
| Accurate 2520 | <<locked>> | 80% | 35,926 psi | 60% | 2303 fps | 98.6% |
| Accurate 2520 | <<locked>> | 80% | 35,926 psi | 60% | 2303 fps | 98.6% |
| Accurate 4064 | <<locked>> | 80% | 29,747 psi | 49% | 2175 fps | 98% |
| Accurate 4350 | <<locked>> | 98% | 38,638 psi | 64% | 2418 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 47,485 psi | 79% | 2359 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,834 psi | 79% | 2379 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 35,737 psi | 59% | 2277 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 88% | 39,030 psi | 65% | 2326 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 46,905 psi | 78% | 2461 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,710 psi | 63% | 2293 fps | 97.4% |
| Alliant AR-Comp | <<locked>> | 80% | 36,201 psi | 60% | 2303 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,294 psi | 72% | 2467 fps | 98.2% |
| Alliant Power Pro 2000-MR | 59 gr | 86% | 39,218 psi | 65% | 2431 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 33,257 psi | 55% | 2251 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,324 psi | 74% | 2375 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 36,143 psi | 60% | 2306 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 98% | 40,190 psi | 67% | 2431 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 90% | 35,244 psi | 59% | 2356 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,137 psi | 77% | 2356 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 39,421 psi | 65% | 2372 fps | 95.3% |
| Bofors RP3 | <<locked>> | 84% | 32,547 psi | 54% | 2251 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,842 psi | 66% | 2297 fps | 98.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,534 psi | 59% | 2303 fps | 97.5% |
| Hodgdon CFE223 | 56.2 gr | 80% | 39,088 psi | 65% | 2415 fps | 95.9% |
| Hodgdon H322 | <<locked>> | 80% | 39,784 psi | 66% | 2343 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 80% | 45,992 psi | 76% | 2457 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 41,220 psi | 68% | 2398 fps | 95% |
| Hodgdon H4198 | <<locked>> | 80% | 49,226 psi | 82% | 2402 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 35,926 psi | 60% | 2287 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 34,301 psi | 57% | 2283 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 32,198 psi | 53% | 2251 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,556 psi | 42% | 1362 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 34,272 psi | 57% | 2238 fps | 95.5% |
| IMR 3031 | <<locked>> | 80% | 31,836 psi | 53% | 2238 fps | 99.5% |
| IMR 4064 | <<locked>> | 88% | 38,043 psi | 63% | 2303 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 45,179 psi | 75% | 2346 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 34,635 psi | 58% | 2287 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 37,710 psi | 63% | 2293 fps | 97.4% |
| Lovex D073.5 | <<locked>> | 80% | 41,959 psi | 70% | 2372 fps | 99.1% |
| Lovex D073.6 | <<locked>> | 80% | 33,794 psi | 56% | 2260 fps | 98.1% |
| Lovex S060 | <<locked>> | 80% | 36,782 psi | 61% | 2234 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 31,546 psi | 52% | 2178 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 49,951 psi | 83% | 2431 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,114 psi | 58% | 2244 fps | 96.8% |
| Norma 202 | <<locked>> | 80% | 35,041 psi | 58% | 2260 fps | 98.9% |
| Norma 203B | <<locked>> | 84% | 35,462 psi | 59% | 2300 fps | 95.5% |
| Norma URP | <<locked>> | 98% | 39,610 psi | 66% | 2418 fps | 95% |
| Ramshot Big Game | <<locked>> | 86% | 37,420 psi | 62% | 2356 fps | 95.7% |
| Ramshot TAC | <<locked>> | 86% | 45,687 psi | 76% | 2434 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,405 psi | 60% | 2303 fps | 95.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,959 psi | 68% | 2336 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,657 psi | 43% | 1394 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,322 psi | 70% | 2375 fps | 99.3% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 51,126 psi | 85% | 2530 fps | 95.6% |
| ReloadSwiss RS 52 | 55.9 gr | 84% | 37,318 psi | 62% | 2392 fps | 95.3% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 29,109 psi | 48% | 2208 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 38,667 psi | 64% | 2293 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 80% | 33,460 psi | 56% | 2201 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 86% | 32,648 psi | 54% | 2244 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,794 psi | 56% | 2260 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 31,546 psi | 52% | 2178 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,802 psi | 74% | 2388 fps | 98.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,837 psi | 86% | 2192 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,166 psi | 78% | 2467 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 36,390 psi | 60% | 2339 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,933 psi | 75% | 2388 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 43,410 psi | 72% | 2405 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 36,550 psi | 61% | 2297 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,840 psi | 61% | 2221 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,095 psi | 50% | 2096 fps | 98.5% |
| Somchem S321 | <<locked>> | 80% | 40,132 psi | 67% | 2362 fps | 98.3% |
| Somchem S335 | <<locked>> | 80% | 36,332 psi | 60% | 2224 fps | 99.5% |
| Somchem S341 | <<locked>> | 80% | 35,027 psi | 58% | 2257 fps | 95% |
| Somchem S355 | <<locked>> | 86% | 33,939 psi | 56% | 2257 fps | 95.5% |
| Somchem S365 | <<locked>> | 94% | 31,169 psi | 52% | 2270 fps | 95.5% |
| Unknown powder | <<locked>> | 98% | 43,656 psi | 73% | 2477 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 41,872 psi | 70% | 2293 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,840 psi | 61% | 2224 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,024 psi | 53% | 2198 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 33,156 psi | 55% | 2205 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 84% | 30,197 psi | 50% | 2156 fps | 95.7% |
| Vihtavuori N160 | <<locked>> | 98% | 41,887 psi | 70% | 2425 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 37,565 psi | 62% | 2290 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 80% | 31,676 psi | 53% | 2185 fps | 97.9% |
| Vihtavuori N550 | <<locked>> | 98% | 40,799 psi | 68% | 2428 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 35,389 psi | 59% | 2267 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 39,001 psi | 65% | 2379 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,539 psi | 69% | 2411 fps | 97.8% |
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 93 powders for 9.3 x 66 Sako loaded with the .366 | 250gr | Swift A-Frame. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,684 fps; across all powders the maximum-charge window runs from 1,526 fps to 2,684 fps. Accurate 4350 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.366" calls for a 1:6.0 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 52, Hodgdon CFE223 rank at the top here: for 9.3 x 66 Sako with the .366 | 250gr | Swift A-Frame 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.