Load data for 9.3 x 66 Sako + .366 | 250gr | Swift A-Frame

9.3 x 66 Sako cartridge drawing
Swift logo

Load Specifications

Bullet Manufacturer:Swift
Bullet Weight:250 gr
Bullet Diameter:0.366"
Bullet Length:<<locked>>
Case Length (l3):2.59"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:81 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:60,191 psi
Recommended Twist Rate:1:6.0

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.

A valid access license is required to use the Personalized Load Calculator.

You can find more information in our FAQ: How can I use the Personalized Load Calculator?

Max Load - Barrel Length: 24"

PowderChargeFRMaxP%V(0)z
Accurate 2015<<locked>>90%52,997 psi88%2490 fps100%
Accurate 2200<<locked>>82%53,447 psi89%2569 fps98.6%
Accurate 2230<<locked>>82%54,288 psi90%2582 fps98.9%
Accurate 2460<<locked>>86%51,329 psi85%2510 fps100%
Accurate 2495<<locked>>96%53,098 psi88%2543 fps100%
Accurate 2520<<locked>>92%54,346 psi90%2595 fps100%
Accurate 2520<<locked>>92%54,346 psi90%2595 fps100%
Accurate 4064<<locked>>98%52,489 psi87%2575 fps100%
Accurate 4350ᴾ<<locked>>100%41,423 psi69%2467 fps95.8%
Accurate LT-30<<locked>>84%53,635 psi89%2444 fps100%
Accurate LT-32<<locked>>84%54,027 psi90%2464 fps100%
ADI AR 2206H<<locked>>92%51,880 psi86%2562 fps99%
ADI AR 2208<<locked>>98%52,707 psi88%2556 fps98.6%
ADI AR 2219<<locked>>84%53,722 psi89%2552 fps100%
ADI Benchmark 8208<<locked>>90%51,372 psi85%2526 fps99.6%
Alliant AR-Comp<<locked>>92%53,940 psi90%2556 fps100%
Alliant Power Pro 1200-R<<locked>>86%52,794 psi88%2621 fps99.5%
Alliant Power Pro 2000-MR<<locked>>94%51,184 psi85%2654 fps98.3%
Alliant Reloder- TS 15.5<<locked>>98%51,750 psi86%2579 fps99.5%
Alliant Reloder-10x<<locked>>86%53,098 psi88%2497 fps100%
Alliant Reloder-15<<locked>>96%52,634 psi87%2595 fps98.7%
Alliant Reloder-16ᴾ<<locked>>100%42,569 psi71%2477 fps96%
Alliant Reloder-17ᴾ<<locked>>100%48,675 psi81%2618 fps99%
Baschieri & Pellagri 106<<locked>>84%52,431 psi87%2444 fps100%
Baschieri & Pellagri 107<<locked>>92%51,271 psi85%2572 fps98.1%
Bofors RP3<<locked>>98%51,764 psi86%2589 fps99.6%
Hodgdon Benchmark<<locked>>90%53,969 psi90%2520 fps99.9%
Hodgdon BL-C2<<locked>>92%53,200 psi88%2598 fps99.9%
Hodgdon CFE223<<locked>>88%51,430 psi85%2631 fps98.6%
Hodgdon H322<<locked>>88%51,343 psi85%2523 fps100%
Hodgdon H335<<locked>>84%52,678 psi88%2552 fps100%
Hodgdon H380<<locked>>98%53,693 psi89%2595 fps97.8%
Hodgdon H4198<<locked>>82%52,243 psi87%2444 fps100%
Hodgdon H4895<<locked>>92%52,286 psi87%2572 fps99.4%
Hodgdon Hybrid 100Vᴾ<<locked>>100%38,769 psi64%2375 fps96.7%
Hodgdon LEVERevolution<<locked>>98%53,838 psi89%2644 fps99.7%
Hodgdon TrailBossᴾ<<locked>>100%34,345 psi57%1526 fps100%
Hodgdon VARGET<<locked>>96%52,518 psi87%2559 fps99.3%
IMR 3031<<locked>>96%52,692 psi88%2585 fps100%
IMR 4064<<locked>>98%51,343 psi85%2526 fps98.6%
IMR 4198<<locked>>86%53,911 psi90%2464 fps100%
IMR 4895<<locked>>96%53,911 psi90%2625 fps99.3%
IMR 8208 XBR<<locked>>90%51,372 psi85%2526 fps99.6%
Lovex D073.5<<locked>>86%51,300 psi85%2516 fps99.9%
Lovex D073.6<<locked>>94%54,056 psi90%2592 fps100%
Lovex S060<<locked>>92%52,591 psi87%2503 fps99%
Lovex S062<<locked>>96%51,532 psi86%2543 fps99.7%
Norma 200<<locked>>82%53,258 psi88%2474 fps100%
Norma 201<<locked>>94%53,969 psi90%2562 fps99.8%
Norma 202<<locked>>94%54,186 psi90%2569 fps100%
Norma 203B<<locked>>96%51,692 psi86%2582 fps99%
Norma URPᴾ<<locked>>100%42,250 psi70%2467 fps95.8%
Ramshot Big Game<<locked>>96%51,837 psi86%2605 fps98.9%
Ramshot TAC<<locked>>90%52,040 psi86%2536 fps96.8%
Ramshot Wild Boar<<locked>>92%54,288 psi90%2605 fps99.2%
Ramshot X-Terminator<<locked>>88%52,910 psi88%2530 fps98.9%
ReloadSwiss RS 14ᴾ<<locked>>100%34,548 psi57%1558 fps100%
ReloadSwiss RS 40<<locked>>86%51,430 psi85%2520 fps100%
ReloadSwiss RS 50<<locked>>98%54,375 psi90%2575 fps96.3%
ReloadSwiss RS 52<<locked>>94%52,098 psi87%2651 fps98.7%
ReloadSwiss RS 60ᴾ<<locked>>100%52,011 psi86%2684 fps100%
Rottweil R 901<<locked>>90%52,170 psi87%2510 fps100%
Rottweil R 902<<locked>>96%54,317 psi90%2556 fps99.8%
Rottweil R 903ᴾ<<locked>>100%51,372 psi85%2575 fps99.4%
Shooters World Match Rifle<<locked>>94%54,056 psi90%2592 fps100%
Shooters World Precision<<locked>>96%51,532 psi86%2543 fps99.7%
Shooters World Tactical Rifle<<locked>>84%51,184 psi85%2487 fps99.4%
SNPE Vectan BA6 1/2<<locked>>82%54,462 psi90%2221 fps100%
SNPE Vectan SP 10<<locked>>84%53,954 psi90%2562 fps100%
SNPE Vectan SP 11ᴾ<<locked>>100%53,432 psi89%2635 fps99.1%
SNPE Vectan SP 3<<locked>>86%54,244 psi90%2516 fps100%
SNPE Vectan SP 7<<locked>>92%53,345 psi89%2559 fps97.6%
SNPE Vectan SP 9<<locked>>94%53,635 psi89%2585 fps99.2%
SNPE Vectan Tubal 3000<<locked>>92%53,185 psi88%2474 fps100%
SNPE Vectan Tubal 5000<<locked>>98%52,533 psi87%2470 fps100%
Somchem S321<<locked>>88%52,504 psi87%2562 fps99.8%
Somchem S335<<locked>>92%51,967 psi86%2474 fps100%
Somchem S341<<locked>>92%52,460 psi87%2552 fps98.9%
Somchem S355ᴾ<<locked>>100%52,301 psi87%2575 fps99.3%
Somchem S365ᴾ<<locked>>100%37,463 psi62%2418 fps97.9%
Unknown powderᴾ<<locked>>100%46,572 psi77%2530 fps96.1%
Vihtavuori N130<<locked>>88%53,258 psi88%2451 fps100%
Vihtavuori N133<<locked>>92%52,968 psi88%2464 fps100%
Vihtavuori N135<<locked>>96%53,200 psi88%2536 fps100%
Vihtavuori N140<<locked>>94%51,459 psi85%2510 fps100%
Vihtavuori N150ᴾ<<locked>>100%50,546 psi84%2520 fps99.8%
Vihtavuori N160ᴾ<<locked>>100%44,643 psi74%2474 fps96.3%
Vihtavuori N530<<locked>>90%51,967 psi86%2526 fps99.7%
Vihtavuori N540<<locked>>96%52,939 psi88%2549 fps100%
Vihtavuori N550ᴾ<<locked>>100%43,468 psi72%2474 fps95.9%
Winchester 6.5 StaBALLᴾ<<locked>>100%46,035 psi76%2464 fps98.4%
Winchester 748<<locked>>88%51,576 psi86%2582 fps99.9%
Winchester StaBALL Match<<locked>>86%51,517 psi86%2569 fps99.3%

Recommended = one of the top powders for this cartridge and bullet combination.

Start Load - Barrel Length: 24"

PowderChargeFRMaxP%V(0)z
Accurate 2015<<locked>>80%39,059 psi65%2283 fps100%
Accurate 2200<<locked>>80%50,067 psi83%2520 fps98.1%
Accurate 2230<<locked>>80%50,604 psi84%2530 fps98.4%
Accurate 2460<<locked>>80%42,148 psi70%2372 fps99.7%
Accurate 2495<<locked>>80%31,459 psi52%2195 fps99.8%
Accurate 2520<<locked>>80%35,926 psi60%2303 fps98.6%
Accurate 2520<<locked>>80%35,926 psi60%2303 fps98.6%
Accurate 4064<<locked>>80%29,747 psi49%2175 fps98%
Accurate 4350<<locked>>98%38,638 psi64%2418 fps95%
Accurate LT-30<<locked>>80%47,485 psi79%2359 fps100%
Accurate LT-32<<locked>>80%47,834 psi79%2379 fps99.9%
ADI AR 2206H<<locked>>80%35,737 psi59%2277 fps95.5%
ADI AR 2208<<locked>>88%39,030 psi65%2326 fps95.6%
ADI AR 2219<<locked>>80%46,905 psi78%2461 fps100%
ADI Benchmark 8208<<locked>>80%37,710 psi63%2293 fps97.4%
Alliant AR-Comp<<locked>>80%36,201 psi60%2303 fps100%
Alliant Power Pro 1200-R<<locked>>80%43,294 psi72%2467 fps98.2%
Alliant Power Pro 2000-MR59 gr86%39,218 psi65%2431 fps95.1%
Alliant Reloder- TS 15.5<<locked>>84%33,257 psi55%2251 fps95.8%
Alliant Reloder-10x<<locked>>80%44,324 psi74%2375 fps100%
Alliant Reloder-15<<locked>>84%36,143 psi60%2306 fps95%
Alliant Reloder-16<<locked>>98%40,190 psi67%2431 fps95.1%
Alliant Reloder-17<<locked>>90%35,244 psi59%2356 fps95.3%
Baschieri & Pellagri 106<<locked>>80%46,137 psi77%2356 fps100%
Baschieri & Pellagri 107<<locked>>84%39,421 psi65%2372 fps95.3%
Bofors RP3<<locked>>84%32,547 psi54%2251 fps95.7%
Hodgdon Benchmark<<locked>>80%39,842 psi66%2297 fps98.4%
Hodgdon BL-C2<<locked>>80%35,534 psi59%2303 fps97.5%
Hodgdon CFE22356.2 gr80%39,088 psi65%2415 fps95.9%
Hodgdon H322<<locked>>80%39,784 psi66%2343 fps99.9%
Hodgdon H335<<locked>>80%45,992 psi76%2457 fps100%
Hodgdon H380<<locked>>90%41,220 psi68%2398 fps95%
Hodgdon H4198<<locked>>80%49,226 psi82%2402 fps100%
Hodgdon H4895<<locked>>80%35,926 psi60%2287 fps96.2%
Hodgdon Hybrid 100V<<locked>>96%34,301 psi57%2283 fps95.1%
Hodgdon LEVERevolution<<locked>>82%32,198 psi53%2251 fps95.2%
Hodgdon TrailBoss<<locked>>80%25,556 psi42%1362 fps100%
Hodgdon VARGET<<locked>>82%34,272 psi57%2238 fps95.5%
IMR 3031<<locked>>80%31,836 psi53%2238 fps99.5%
IMR 4064<<locked>>88%38,043 psi63%2303 fps95.6%
IMR 4198<<locked>>80%45,179 psi75%2346 fps100%
IMR 4895<<locked>>82%34,635 psi58%2287 fps95.2%
IMR 8208 XBR<<locked>>80%37,710 psi63%2293 fps97.4%
Lovex D073.5<<locked>>80%41,959 psi70%2372 fps99.1%
Lovex D073.6<<locked>>80%33,794 psi56%2260 fps98.1%
Lovex S060<<locked>>80%36,782 psi61%2234 fps95.8%
Lovex S062<<locked>>80%31,546 psi52%2178 fps95.6%
Norma 200<<locked>>80%49,951 psi83%2431 fps100%
Norma 201<<locked>>80%35,114 psi58%2244 fps96.8%
Norma 202<<locked>>80%35,041 psi58%2260 fps98.9%
Norma 203B<<locked>>84%35,462 psi59%2300 fps95.5%
Norma URP<<locked>>98%39,610 psi66%2418 fps95%
Ramshot Big Game<<locked>>86%37,420 psi62%2356 fps95.7%
Ramshot TAC<<locked>>86%45,687 psi76%2434 fps95.4%
Ramshot Wild Boar<<locked>>80%36,405 psi60%2303 fps95.6%
Ramshot X-Terminator<<locked>>80%40,959 psi68%2336 fps96.8%
ReloadSwiss RS 14<<locked>>80%25,657 psi43%1394 fps100%
ReloadSwiss RS 40<<locked>>80%42,322 psi70%2375 fps99.3%
ReloadSwiss RS 50<<locked>>96%51,126 psi85%2530 fps95.6%
ReloadSwiss RS 5255.9 gr84%37,318 psi62%2392 fps95.3%
ReloadSwiss RS 60<<locked>>82%29,109 psi48%2208 fps95.2%
Rottweil R 901<<locked>>80%38,667 psi64%2293 fps99.3%
Rottweil R 902<<locked>>80%33,460 psi56%2201 fps96.2%
Rottweil R 903<<locked>>86%32,648 psi54%2244 fps95.3%
Shooters World Match Rifle<<locked>>80%33,794 psi56%2260 fps98.1%
Shooters World Precision<<locked>>80%31,546 psi52%2178 fps95.6%
Shooters World Tactical Rifle<<locked>>80%44,802 psi74%2388 fps98.6%
SNPE Vectan BA6 1/2<<locked>>80%51,837 psi86%2192 fps100%
SNPE Vectan SP 10<<locked>>80%47,166 psi78%2467 fps100%
SNPE Vectan SP 11<<locked>>88%36,390 psi60%2339 fps95.4%
SNPE Vectan SP 3<<locked>>80%44,933 psi75%2388 fps100%
SNPE Vectan SP 7<<locked>>86%43,410 psi72%2405 fps95.4%
SNPE Vectan SP 9<<locked>>82%36,550 psi61%2297 fps95.7%
SNPE Vectan Tubal 3000<<locked>>80%36,840 psi61%2221 fps99.1%
SNPE Vectan Tubal 5000<<locked>>80%30,095 psi50%2096 fps98.5%
Somchem S321<<locked>>80%40,132 psi67%2362 fps98.3%
Somchem S335<<locked>>80%36,332 psi60%2224 fps99.5%
Somchem S341<<locked>>80%35,027 psi58%2257 fps95%
Somchem S355<<locked>>86%33,939 psi56%2257 fps95.5%
Somchem S365<<locked>>94%31,169 psi52%2270 fps95.5%
Unknown powder<<locked>>98%43,656 psi73%2477 fps95.3%
Vihtavuori N130<<locked>>80%41,872 psi70%2293 fps100%
Vihtavuori N133<<locked>>80%36,840 psi61%2224 fps100%
Vihtavuori N135<<locked>>80%32,024 psi53%2198 fps99.8%
Vihtavuori N140<<locked>>80%33,156 psi55%2205 fps98.7%
Vihtavuori N150<<locked>>84%30,197 psi50%2156 fps95.7%
Vihtavuori N160<<locked>>98%41,887 psi70%2425 fps95.5%
Vihtavuori N530<<locked>>80%37,565 psi62%2290 fps97.5%
Vihtavuori N540<<locked>>80%31,676 psi53%2185 fps97.9%
Vihtavuori N550<<locked>>98%40,799 psi68%2428 fps95.1%
Winchester 6.5 StaBALL<<locked>>92%35,389 psi59%2267 fps95.5%
Winchester 748<<locked>>80%39,001 psi65%2379 fps98.6%
Winchester StaBALL Match<<locked>>80%41,539 psi69%2411 fps97.8%

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.

<<locked>> you need an access license to unlock this data.

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.

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