Load Specifications
Load data in caliber .223 WSSM with .224 | 62gr | Norma RN bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Alliant Reloder-17.
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"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 57,290 psi | 90% | 3422 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 57,261 psi | 90% | 3448 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,709 psi | 87% | 3432 fps | 96.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 3379 fps | 97.1% |
| Accurate 4064 | <<locked>> | 88% | 57,392 psi | 90% | 3501 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,708 psi | 86% | 3530 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 84% | 57,029 psi | 89% | 3537 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 88% | 54,505 psi | 85% | 3471 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,477 psi | 87% | 3474 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,768 psi | 89% | 3451 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 57,638 psi | 90% | 3678 fps | 99.8% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 56,347 psi | 88% | 3563 fps | 96% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 56,347 psi | 88% | 3563 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,245 psi | 87% | 3501 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,434 psi | 87% | 3524 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,593 psi | 87% | 3606 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,101 psi | 89% | 3642 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,905 psi | 72% | 3406 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,026 psi | 83% | 3622 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 57,203 psi | 90% | 3547 fps | 99.6% |
| Bofors RP3 | <<locked>> | 88% | 56,028 psi | 88% | 3517 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 55,506 psi | 87% | 3474 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,811 psi | 89% | 3458 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,448 psi | 87% | 3501 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 56,855 psi | 89% | 3530 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 94% | 57,450 psi | 90% | 3593 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 92% | 57,058 psi | 89% | 3543 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 84% | 57,696 psi | 90% | 3550 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,796 psi | 87% | 3517 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,911 psi | 84% | 3514 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,027 psi | 85% | 3550 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 56% | 2267 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,955 psi | 86% | 3488 fps | 99.9% |
| IMR 3031 | <<locked>> | 82% | 54,128 psi | 85% | 3474 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 57,421 psi | 90% | 3517 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 86% | 57,043 psi | 89% | 3488 fps | 97.6% |
| IMR 4350 | <<locked>> | 96% | 56,565 psi | 89% | 3507 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 57,319 psi | 90% | 3514 fps | 97.6% |
| IMR 4831 | <<locked>> | 96% | 55,390 psi | 87% | 3524 fps | 99.4% |
| IMR 4895 | <<locked>> | 86% | 56,869 psi | 89% | 3560 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 82% | 55,477 psi | 87% | 3474 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 57,435 psi | 90% | 3507 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,883 psi | 88% | 3451 fps | 99.9% |
| Lovex S062 | <<locked>> | 88% | 57,493 psi | 90% | 3510 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 57,159 psi | 90% | 3507 fps | 98.7% |
| Lovex S070 | <<locked>> | 94% | 55,027 psi | 86% | 3488 fps | 97.5% |
| Norma 201 | <<locked>> | 84% | 55,564 psi | 87% | 3474 fps | 100% |
| Norma 202 | <<locked>> | 84% | 56,159 psi | 88% | 3474 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,708 psi | 86% | 3507 fps | 99.8% |
| Norma 204 | <<locked>> | 96% | 57,551 psi | 90% | 3563 fps | 96% |
| Norma MRPᴾ | <<locked>> | 100% | 51,996 psi | 81% | 3563 fps | 96.7% |
| Norma URP | <<locked>> | 96% | 57,334 psi | 90% | 3583 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 86% | 55,753 psi | 87% | 3530 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 96% | 56,072 psi | 88% | 3570 fps | 98.4% |
| Ramshot TAC | <<locked>> | 82% | 56,115 psi | 88% | 3488 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,014 psi | 88% | 3510 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,361 psi | 57% | 2320 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 56,695 psi | 89% | 3504 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 56,434 psi | 88% | 3606 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 56,536 psi | 89% | 3642 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,592 psi | 86% | 3547 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 57,522 psi | 90% | 3648 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 82% | 56,318 psi | 88% | 3461 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,999 psi | 88% | 3471 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 55,898 psi | 88% | 3507 fps | 100% |
| Rottweil R 907 | <<locked>> | 92% | 55,506 psi | 87% | 3474 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 57,159 psi | 90% | 3507 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 57,435 psi | 90% | 3507 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 57,493 psi | 90% | 3510 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,027 psi | 86% | 3488 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 54,099 psi | 85% | 3507 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,505 psi | 85% | 3461 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,622 psi | 87% | 3497 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 56,507 psi | 89% | 3406 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 57,493 psi | 90% | 3399 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 57,493 psi | 90% | 3455 fps | 97.8% |
| Somchem S335 | <<locked>> | 84% | 56,202 psi | 88% | 3396 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,447 psi | 85% | 3455 fps | 99.7% |
| Somchem S355 | <<locked>> | 90% | 56,115 psi | 88% | 3507 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 55,912 psi | 88% | 3579 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,376 psi | 87% | 3504 fps | 96.8% |
| Vihtavuori N133 | <<locked>> | 84% | 56,898 psi | 89% | 3386 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,231 psi | 88% | 3435 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,014 psi | 89% | 3448 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 57,711 psi | 90% | 3481 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,796 psi | 87% | 3514 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 82% | 55,927 psi | 88% | 3474 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,230 psi | 87% | 3435 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,143 psi | 86% | 3514 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,314 psi | 80% | 3501 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,101 psi | 88% | 3478 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 56,521 psi | 89% | 3527 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 57,450 psi | 90% | 3593 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,597 psi | 65% | 3425 fps | 99.6% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,521 psi | 87% | 3501 fps | 100% |
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% | 53,838 psi | 84% | 3366 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,847 psi | 73% | 3271 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 52,083 psi | 82% | 3366 fps | 95.8% |
| Accurate 3100 | <<locked>> | 96% | 42,685 psi | 67% | 3238 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 44,309 psi | 69% | 3261 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 38,450 psi | 60% | 3179 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 50,111 psi | 79% | 3406 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 42,293 psi | 66% | 3212 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,185 psi | 82% | 3415 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 53,171 psi | 83% | 3396 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,224 psi | 72% | 3442 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 52,547 psi | 82% | 3488 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 52,547 psi | 82% | 3488 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,409 psi | 66% | 3241 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,701 psi | 72% | 3327 fps | 98.3% |
| Alliant Reloder-16 | 38.8 gr | 84% | 37,492 psi | 59% | 3186 fps | 95.5% |
| Alliant Reloder-17 | 39.8 gr | 80% | 37,173 psi | 58% | 3202 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 90% | 33,185 psi | 52% | 3064 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 92% | 39,175 psi | 61% | 3291 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,632 psi | 78% | 3402 fps | 98.7% |
| Bofors RP3 | <<locked>> | 80% | 42,757 psi | 67% | 3251 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 49,066 psi | 77% | 3346 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,490 psi | 84% | 3399 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,750 psi | 81% | 3435 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,294 psi | 68% | 3255 fps | 96.6% |
| Hodgdon H414 | <<locked>> | 88% | 46,514 psi | 73% | 3369 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 90% | 53,621 psi | 84% | 3478 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 50,676 psi | 79% | 3422 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 32,430 psi | 51% | 2992 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,152 psi | 74% | 3383 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 90% | 49,980 psi | 78% | 3468 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,672 psi | 42% | 2037 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,225 psi | 76% | 3353 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 50,720 psi | 79% | 3415 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,382 psi | 70% | 3258 fps | 98.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,891 psi | 73% | 3281 fps | 95.3% |
| IMR 4350 | <<locked>> | 92% | 49,705 psi | 78% | 3376 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 47,514 psi | 74% | 3317 fps | 95.4% |
| IMR 4831 | <<locked>> | 84% | 36,898 psi | 58% | 3117 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 46,833 psi | 73% | 3363 fps | 99% |
| IMR 8208 XBR | <<locked>> | 80% | 52,185 psi | 82% | 3415 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 49,908 psi | 78% | 3379 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,168 psi | 77% | 3323 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 44,585 psi | 70% | 3264 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 41,858 psi | 66% | 3189 fps | 95.3% |
| Lovex S070 | <<locked>> | 88% | 45,440 psi | 71% | 3287 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 48,762 psi | 76% | 3343 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 49,226 psi | 77% | 3353 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,092 psi | 71% | 3310 fps | 98.6% |
| Norma 204 | <<locked>> | 94% | 53,925 psi | 85% | 3494 fps | 95.1% |
| Norma MRP | <<locked>> | 98% | 48,356 psi | 76% | 3484 fps | 95.7% |
| Norma URP | <<locked>> | 84% | 38,159 psi | 60% | 3169 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 45,005 psi | 71% | 3320 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 88% | 42,685 psi | 67% | 3287 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 52,199 psi | 82% | 3415 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,359 psi | 82% | 3448 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,948 psi | 42% | 2080 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,540 psi | 68% | 3232 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,834 psi | 77% | 3455 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,537 psi | 62% | 3284 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 38,319 psi | 60% | 3189 fps | 95.2% |
| ReloadSwiss RS 70 | 43.5 gr | 86% | 40,466 psi | 63% | 3271 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 52,997 psi | 83% | 3402 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,499 psi | 73% | 3287 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 39,914 psi | 63% | 3179 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 88% | 49,066 psi | 77% | 3346 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 41,858 psi | 66% | 3189 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,908 psi | 78% | 3379 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,585 psi | 70% | 3264 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 88% | 45,440 psi | 71% | 3287 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,205 psi | 65% | 3238 fps | 97.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,894 psi | 80% | 3389 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,602 psi | 76% | 3363 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,806 psi | 78% | 3291 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,829 psi | 66% | 3120 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 47,021 psi | 74% | 3251 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 49,487 psi | 78% | 3281 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,502 psi | 79% | 3379 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 40,509 psi | 63% | 3182 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 30,037 psi | 47% | 2972 fps | 95.7% |
| Somchem S385 | <<locked>> | 96% | 48,066 psi | 75% | 3360 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 50,227 psi | 79% | 3281 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,325 psi | 73% | 3264 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,688 psi | 73% | 3268 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,638 psi | 61% | 3104 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 82% | 37,159 psi | 58% | 3110 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 52,518 psi | 82% | 3412 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,382 psi | 71% | 3255 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 39,291 psi | 62% | 3173 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 90% | 36,579 psi | 57% | 3163 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,316 psi | 54% | 3005 fps | 96.6% |
| Winchester 748 | <<locked>> | 80% | 52,736 psi | 83% | 3461 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 46,876 psi | 73% | 3379 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 92% | 31,647 psi | 50% | 3094 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,385 psi | 76% | 3366 fps | 99.5% |
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 95 powders for .223 WSSM loaded with the .224 | 62gr | Norma RN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,678 fps; across all powders the maximum-charge window runs from 2,267 fps to 3,678 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 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 62.0 gr projectile in 0.224" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Power Pro Varmint, Alliant Power Pro Varmint 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 Reloder-16, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for .223 WSSM with the .224 | 62gr | Norma RN 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.