Load Specifications
Bullet:.243 | 80gr | Frontier BTSP
Bullet Manufacturer:Frontier Bullets
Bullet Weight:80 gr
Bullet Diameter:0.243"
Bullet Length:<<locked>>
Caliber:.243 WSSM load data
Case Length (l3):1.663"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:53.9 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:9.0
Load data in caliber .243 WSSM with .243 | 80gr | Frontier BTSP bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR 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.
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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>> | 84% | 54,549 psi | 85% | 3173 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,536 psi | 89% | 3248 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 56,927 psi | 89% | 3248 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 54,897 psi | 86% | 3258 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,304 psi | 88% | 3228 fps | 96% |
| Accurate 4064 | <<locked>> | 92% | 56,797 psi | 89% | 3294 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 3379 fps | 99.3% |
| ADI AR 2206H | <<locked>> | 88% | 57,334 psi | 90% | 3333 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 54,911 psi | 86% | 3268 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,304 psi | 88% | 3281 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 57,000 psi | 89% | 3258 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 57,363 psi | 90% | 3461 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,679 psi | 86% | 3291 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 57,246 psi | 90% | 3228 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,405 psi | 87% | 3317 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 3379 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,985 psi | 88% | 3425 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,088 psi | 61% | 3061 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,816 psi | 69% | 3232 fps | 96.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 57,232 psi | 90% | 3340 fps | 99.3% |
| Bofors RP3 | <<locked>> | 92% | 55,709 psi | 87% | 3314 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,564 psi | 87% | 3264 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,563 psi | 86% | 3205 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,637 psi | 87% | 3304 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,780 psi | 84% | 3346 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 82% | 56,739 psi | 89% | 3278 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,507 psi | 89% | 3320 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 98% | 56,173 psi | 88% | 3366 fps | 97% |
| Hodgdon H4895 | <<locked>> | 86% | 54,360 psi | 85% | 3287 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,763 psi | 80% | 3238 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 57,377 psi | 90% | 3373 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 57,406 psi | 90% | 3406 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,331 psi | 55% | 2064 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,738 psi | 87% | 3291 fps | 99.8% |
| IMR 3031 | <<locked>> | 88% | 57,624 psi | 90% | 3327 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,302 psi | 85% | 3251 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,418 psi | 85% | 3222 fps | 96.5% |
| IMR 4198 | <<locked>> | 82% | 57,217 psi | 90% | 3189 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,912 psi | 88% | 3291 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 96% | 57,522 psi | 90% | 3304 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,925 psi | 85% | 3304 fps | 98.9% |
| IMR 4895 | <<locked>> | 90% | 56,826 psi | 89% | 3353 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 56,304 psi | 88% | 3281 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,666 psi | 89% | 3261 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 57,145 psi | 90% | 3304 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 56,710 psi | 89% | 3251 fps | 99.7% |
| Lovex S062 | <<locked>> | 92% | 57,667 psi | 90% | 3307 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 57,043 psi | 89% | 3297 fps | 98.3% |
| Lovex S070 | <<locked>> | 98% | 54,549 psi | 85% | 3274 fps | 96.8% |
| Norma 201 | <<locked>> | 88% | 55,869 psi | 88% | 3268 fps | 100% |
| Norma 202 | <<locked>> | 88% | 56,347 psi | 88% | 3274 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,578 psi | 86% | 3301 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 56,043 psi | 88% | 3363 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 90% | 55,376 psi | 87% | 3327 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,042 psi | 86% | 3353 fps | 97.7% |
| Ramshot TAC | <<locked>> | 86% | 56,565 psi | 89% | 3284 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,492 psi | 89% | 3317 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 57,101 psi | 89% | 3274 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,766 psi | 56% | 2110 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,666 psi | 87% | 3258 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 56,942 psi | 89% | 3297 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,854 psi | 88% | 3389 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,506 psi | 87% | 3425 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 57,101 psi | 89% | 3402 fps | 99.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 56,463 psi | 88% | 3422 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 86% | 56,739 psi | 89% | 3255 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,333 psi | 88% | 3268 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,477 psi | 87% | 3301 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 96% | 55,564 psi | 87% | 3264 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 57,043 psi | 89% | 3297 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 57,145 psi | 90% | 3304 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 57,667 psi | 90% | 3307 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,549 psi | 85% | 3274 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 57,203 psi | 90% | 3363 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,042 psi | 86% | 3261 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,782 psi | 87% | 3294 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 57,435 psi | 90% | 3209 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,172 psi | 85% | 3150 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,751 psi | 84% | 3179 fps | 96.4% |
| Somchem S321 | <<locked>> | 82% | 53,954 psi | 85% | 3251 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,753 psi | 89% | 3202 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,839 psi | 86% | 3258 fps | 99.6% |
| Somchem S355 | <<locked>> | 94% | 55,680 psi | 87% | 3297 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,183 psi | 79% | 3301 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 57,145 psi | 90% | 3173 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 57,595 psi | 90% | 3189 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,188 psi | 88% | 3235 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 57,276 psi | 90% | 3251 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 57,450 psi | 90% | 3278 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,056 psi | 86% | 3301 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 86% | 56,840 psi | 89% | 3278 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,361 psi | 87% | 3241 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,882 psi | 84% | 3297 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,714 psi | 67% | 3153 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,695 psi | 87% | 3278 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 56,797 psi | 89% | 3330 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 56,565 psi | 89% | 3373 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,070 psi | 55% | 3035 fps | 96.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 55,825 psi | 87% | 3304 fps | 99.9% |
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% | 47,964 psi | 75% | 3064 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,040 psi | 83% | 3196 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,712 psi | 64% | 2969 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,906 psi | 75% | 3140 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,489 psi | 82% | 3166 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 38,493 psi | 60% | 2953 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 40,089 psi | 63% | 3045 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 44,280 psi | 69% | 3084 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 37,797 psi | 59% | 2910 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,311 psi | 73% | 3097 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 46,456 psi | 73% | 3094 fps | 100% |
| Alliant Power Pro 2000-MR | 38.9 gr | 80% | 40,321 psi | 63% | 3100 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,202 psi | 58% | 2930 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 54,056 psi | 85% | 3182 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,972 psi | 63% | 3002 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 90% | 39,653 psi | 62% | 3054 fps | 95.8% |
| Alliant Reloder-17 | 39.3 gr | 82% | 34,592 psi | 54% | 2946 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 34,432 psi | 54% | 2930 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 40,712 psi | 64% | 3153 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,656 psi | 68% | 3081 fps | 97% |
| Bofors RP3 | <<locked>> | 80% | 36,898 psi | 58% | 2930 fps | 97.3% |
| Bofors RP7 | <<locked>> | 94% | 52,156 psi | 82% | 3202 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,240 psi | 76% | 3094 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,368 psi | 71% | 3117 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,024 psi | 78% | 3281 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 80% | 53,113 psi | 83% | 3219 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 40,625 psi | 64% | 3002 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 94% | 48,936 psi | 77% | 3232 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 44,657 psi | 70% | 3097 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 34,360 psi | 54% | 2874 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,930 psi | 64% | 3061 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 96% | 53,374 psi | 84% | 3333 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,208 psi | 41% | 1847 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,931 psi | 67% | 3041 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 44,324 psi | 69% | 3104 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,668 psi | 62% | 2953 fps | 96.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 51,155 psi | 80% | 3159 fps | 95.8% |
| IMR 4198 | <<locked>> | 80% | 53,983 psi | 85% | 3140 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 52,518 psi | 82% | 3228 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 50,865 psi | 80% | 3182 fps | 95.6% |
| IMR 4831 | <<locked>> | 90% | 38,493 psi | 60% | 2989 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 40,959 psi | 64% | 3038 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 80% | 46,311 psi | 73% | 3097 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 52,837 psi | 83% | 3199 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,424 psi | 68% | 3061 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 44,251 psi | 69% | 3015 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 39,349 psi | 62% | 2953 fps | 98.2% |
| Lovex S065 | <<locked>> | 90% | 44,411 psi | 70% | 3058 fps | 95.6% |
| Lovex S070 | <<locked>> | 94% | 48,109 psi | 75% | 3153 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 43,323 psi | 68% | 3031 fps | 99% |
| Norma 202 | <<locked>> | 80% | 43,598 psi | 68% | 3045 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,392 psi | 62% | 2989 fps | 97% |
| Norma URP | <<locked>> | 90% | 40,263 psi | 63% | 3048 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 39,030 psi | 61% | 2999 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 94% | 44,817 psi | 70% | 3150 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 46,528 psi | 73% | 3097 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,847 psi | 72% | 3117 fps | 98.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,241 psi | 79% | 3153 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,426 psi | 41% | 1886 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,880 psi | 81% | 3196 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 46,891 psi | 73% | 3110 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,032 psi | 66% | 3117 fps | 97.1% |
| ReloadSwiss RS 60 | 38.3 gr | 80% | 34,316 psi | 54% | 2953 fps | 98.1% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 39,972 psi | 63% | 3064 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 43,033 psi | 67% | 3143 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 47,326 psi | 74% | 3094 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,249 psi | 65% | 2979 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 34,664 psi | 54% | 2867 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 94% | 52,156 psi | 82% | 3202 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 44,411 psi | 70% | 3058 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,424 psi | 68% | 3061 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 39,349 psi | 62% | 2953 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 94% | 48,109 psi | 75% | 3153 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,694 psi | 56% | 2920 fps | 95.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,802 psi | 70% | 3068 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,859 psi | 67% | 3045 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,599 psi | 70% | 2989 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,072 psi | 58% | 2831 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 50,357 psi | 79% | 3117 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 50,386 psi | 79% | 3189 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 44,280 psi | 69% | 2989 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,440 psi | 70% | 3064 fps | 98.1% |
| Somchem S355 | <<locked>> | 80% | 35,505 psi | 56% | 2877 fps | 96.3% |
| Somchem S365 | <<locked>> | 84% | 29,530 psi | 46% | 2792 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 50,314 psi | 79% | 3068 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,889 psi | 70% | 2986 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,567 psi | 64% | 2966 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,292 psi | 65% | 2972 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 33,765 psi | 53% | 2805 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 88% | 39,349 psi | 62% | 2989 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 46,441 psi | 73% | 3094 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 39,900 psi | 63% | 2953 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 38,841 psi | 61% | 2986 fps | 95% |
| Vihtavuori N555 | <<locked>> | 96% | 37,289 psi | 58% | 3022 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 32,271 psi | 51% | 2769 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 46,122 psi | 72% | 3143 fps | 99.7% |
| Winchester 760 | <<locked>> | 94% | 49,284 psi | 77% | 3238 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 32,721 psi | 51% | 2953 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,380 psi | 66% | 3048 fps | 98.3% |
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 99 powders for .243 WSSM loaded with the .243 | 80gr | Frontier BTSP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,461 fps; across all powders the maximum-charge window runs from 2,064 fps to 3,461 fps. Accurate 4350 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 80.0 gr projectile in 0.243" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, Alliant Reloder-17 rank at the top here: for .243 WSSM with the .243 | 80gr | Frontier BTSP 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.