Load Specifications
Load data in caliber 8 x 57 IS with .3235 | 250gr | Prvi Partizan FMJ BT bullet and 96 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 Reloder-17 and Alliant Power Pro 2000-MR.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 50,154 psi | 89% | 2116 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 50,575 psi | 89% | 2169 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 49,516 psi | 88% | 2185 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 51,024 psi | 90% | 2169 fps | 96.5% |
| Accurate 4064 | <<locked>> | 92% | 50,401 psi | 89% | 2205 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,240 psi | 87% | 2267 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 48,936 psi | 87% | 2195 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 49,763 psi | 88% | 2192 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 48,414 psi | 86% | 2159 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 48,211 psi | 85% | 2139 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 51,111 psi | 90% | 2326 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 49,298 psi | 87% | 2211 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 49,734 psi | 88% | 2224 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,530 psi | 86% | 2274 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 96% | 49,037 psi | 87% | 2303 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,360 psi | 61% | 2067 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 37,637 psi | 67% | 2178 fps | 96.6% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 48,051 psi | 85% | 2205 fps | 99.3% |
| Bofors RP3 | <<locked>> | 92% | 49,095 psi | 87% | 2221 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 50,038 psi | 88% | 2195 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 50,415 psi | 89% | 2146 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 49,966 psi | 88% | 2221 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 48,211 psi | 85% | 2251 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 92% | 50,488 psi | 89% | 2231 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 98% | 49,110 psi | 87% | 2264 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 96% | 50,633 psi | 90% | 2234 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 86% | 49,400 psi | 87% | 2201 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,686 psi | 79% | 2175 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 51,082 psi | 90% | 2267 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 50,024 psi | 88% | 2293 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,027 psi | 62% | 1319 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 50,618 psi | 89% | 2205 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 48,660 psi | 86% | 2185 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 49,269 psi | 87% | 2178 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 49,690 psi | 88% | 2159 fps | 97.1% |
| IMR 4350ᴾ | <<locked>> | 100% | 49,676 psi | 88% | 2211 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 94% | 49,124 psi | 87% | 2182 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,920 psi | 83% | 2221 fps | 99.1% |
| IMR 4895 | <<locked>> | 90% | 50,952 psi | 90% | 2247 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 48,414 psi | 86% | 2159 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 51,140 psi | 90% | 2182 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 47,834 psi | 85% | 2175 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 49,211 psi | 87% | 2136 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 48,921 psi | 86% | 2178 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 51,039 psi | 90% | 2215 fps | 98.6% |
| Lovex S070 | <<locked>> | 98% | 48,486 psi | 86% | 2201 fps | 97.3% |
| Norma 201 | <<locked>> | 88% | 50,807 psi | 90% | 2188 fps | 100% |
| Norma 202 | <<locked>> | 86% | 48,095 psi | 85% | 2152 fps | 100% |
| Norma 203B | <<locked>> | 90% | 48,950 psi | 87% | 2215 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 48,936 psi | 87% | 2260 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 90% | 49,066 psi | 87% | 2238 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 47,979 psi | 85% | 2257 fps | 97.8% |
| Ramshot TAC | <<locked>> | 84% | 48,254 psi | 85% | 2169 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 86% | 50,633 psi | 90% | 2224 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 49,052 psi | 87% | 2156 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,418 psi | 63% | 1352 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 51,010 psi | 90% | 2178 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 51,111 psi | 90% | 2218 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 49,705 psi | 88% | 2277 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 48,878 psi | 86% | 2303 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,660 psi | 86% | 2287 fps | 99.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,472 psi | 87% | 2306 fps | 98.9% |
| Rottweil R 901 | <<locked>> | 84% | 49,182 psi | 87% | 2136 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 48,486 psi | 86% | 2152 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 48,994 psi | 87% | 2211 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 50,038 psi | 88% | 2195 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 51,039 psi | 90% | 2215 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 47,834 psi | 85% | 2175 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 48,921 psi | 86% | 2178 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 48,486 psi | 86% | 2201 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 50,575 psi | 89% | 2264 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 49,530 psi | 88% | 2192 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 50,517 psi | 89% | 2215 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 49,690 psi | 88% | 2103 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 49,516 psi | 88% | 2106 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 47,834 psi | 85% | 2133 fps | 96.8% |
| Somchem S321 | <<locked>> | 82% | 48,776 psi | 86% | 2182 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 48,950 psi | 87% | 2106 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 49,037 psi | 87% | 2185 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 49,951 psi | 88% | 2215 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,468 psi | 77% | 2221 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 49,908 psi | 88% | 2077 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 49,821 psi | 88% | 2093 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 50,734 psi | 90% | 2162 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 48,675 psi | 86% | 2139 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 50,836 psi | 90% | 2195 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 48,385 psi | 86% | 2218 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 84% | 48,486 psi | 86% | 2156 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 49,922 psi | 88% | 2178 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,401 psi | 89% | 2264 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,593 psi | 65% | 2123 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 48,834 psi | 86% | 2205 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 51,126 psi | 90% | 2234 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 49,414 psi | 87% | 2267 fps | 97.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 30,516 psi | 54% | 2047 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 88% | 49,763 psi | 88% | 2218 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 44,280 psi | 78% | 2044 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,782 psi | 65% | 1988 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,149 psi | 76% | 2103 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 44,686 psi | 79% | 2080 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 34,809 psi | 62% | 1982 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 30,545 psi | 54% | 1962 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 40,611 psi | 72% | 2070 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 34,606 psi | 61% | 1952 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,641 psi | 75% | 2077 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 42,221 psi | 75% | 2064 fps | 100% |
| Alliant Power Pro 2000-MR | 39.5 gr | 80% | 36,521 psi | 65% | 2090 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,866 psi | 60% | 1972 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,448 psi | 64% | 2018 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 31,995 psi | 57% | 1978 fps | 95.3% |
| Alliant Reloder-17 | 38.9 gr | 80% | 29,138 psi | 52% | 1942 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 94% | 28,819 psi | 51% | 1942 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 35,186 psi | 62% | 2129 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,363 psi | 70% | 2070 fps | 97.8% |
| Bofors RP3 | <<locked>> | 80% | 33,199 psi | 59% | 1972 fps | 98.3% |
| Bofors RP7 | <<locked>> | 92% | 44,367 psi | 78% | 2113 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,498 psi | 79% | 2067 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,799 psi | 72% | 2093 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,034 psi | 80% | 2205 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 80% | 34,214 psi | 60% | 1972 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 92% | 40,654 psi | 72% | 2136 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 94% | 47,732 psi | 84% | 2195 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 40,901 psi | 72% | 2080 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 27,354 psi | 48% | 1854 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,854 psi | 65% | 2057 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 94% | 43,410 psi | 77% | 2192 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,121 psi | 46% | 1178 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,407 psi | 70% | 2044 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 40,335 psi | 71% | 2077 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,274 psi | 64% | 1978 fps | 97.7% |
| IMR 4166 Enduron | <<locked>> | 82% | 41,336 psi | 73% | 2034 fps | 95.2% |
| IMR 4350 | <<locked>> | 96% | 44,077 psi | 78% | 2133 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 43,337 psi | 77% | 2096 fps | 95.6% |
| IMR 4831 | <<locked>> | 88% | 32,024 psi | 57% | 1975 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 37,289 psi | 66% | 2044 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 42,641 psi | 75% | 2077 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 47,805 psi | 85% | 2142 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,088 psi | 69% | 2054 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 41,147 psi | 73% | 2021 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 36,129 psi | 64% | 1985 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 35,491 psi | 63% | 1975 fps | 95% |
| Lovex S070 | <<locked>> | 92% | 40,234 psi | 71% | 2077 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 39,842 psi | 70% | 2034 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 39,987 psi | 71% | 2041 fps | 100% |
| Norma 203B | <<locked>> | 80% | 35,868 psi | 63% | 2011 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 31,575 psi | 56% | 1969 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 35,128 psi | 62% | 2021 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 37,405 psi | 66% | 2083 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 42,380 psi | 75% | 2080 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,829 psi | 74% | 2100 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,963 psi | 81% | 2116 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,281 psi | 46% | 1204 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,688 psi | 84% | 2136 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 39,494 psi | 70% | 2044 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 37,666 psi | 67% | 2096 fps | 98% |
| ReloadSwiss RS 60 | 38.9 gr | 80% | 31,038 psi | 55% | 1995 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 32,793 psi | 58% | 2021 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 35,708 psi | 63% | 2073 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 43,932 psi | 78% | 2067 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,014 psi | 67% | 1998 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 31,270 psi | 55% | 1929 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 44,367 psi | 78% | 2113 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 35,491 psi | 63% | 1975 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,088 psi | 69% | 2054 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 36,129 psi | 64% | 1985 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 92% | 40,234 psi | 71% | 2077 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,300 psi | 57% | 1969 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,451 psi | 72% | 2057 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,044 psi | 69% | 2047 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,510 psi | 73% | 1998 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,229 psi | 61% | 1896 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 42,119 psi | 74% | 2054 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 45,629 psi | 81% | 2139 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 40,959 psi | 72% | 2001 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,147 psi | 71% | 2057 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 32,329 psi | 57% | 1936 fps | 97.5% |
| Somchem S365 | <<locked>> | 82% | 24,816 psi | 44% | 1841 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 46,934 psi | 83% | 2044 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,684 psi | 74% | 1991 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,130 psi | 66% | 1985 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,782 psi | 67% | 1991 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 30,661 psi | 54% | 1886 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 86% | 32,982 psi | 58% | 1969 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 42,554 psi | 75% | 2073 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 36,274 psi | 64% | 1985 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 32,300 psi | 57% | 1972 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 94% | 30,226 psi | 53% | 1995 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 27,354 psi | 48% | 1827 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 41,640 psi | 74% | 2110 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 40,654 psi | 72% | 2136 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 98% | 28,645 psi | 51% | 1995 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,232 psi | 68% | 2051 fps | 99% |
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 96 powders for 8 x 57 IS loaded with the .3235 | 250gr | Prvi Partizan FMJ BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,326 fps; across all powders the maximum-charge window runs from 1,319 fps to 2,326 fps. Accurate 4350 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.3235" calls for a 1:12.0 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 Reloder-17, Alliant Power Pro 2000-MR rank at the top here: for 8 x 57 IS with the .3235 | 250gr | Prvi Partizan FMJ BT 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.