Load Specifications
Load data in caliber .307 Win. with .311 | 90gr | Inceptor SRR bullet and 22 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Shooters World Buffalo Rifle, Lovex D060 and ReloadSwiss RS 36.
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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Max Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 98% | 53,461 psi | 89% | 3150 fps | 97% |
| Accurate 5744 | <<locked>> | 84% | 53,040 psi | 88% | 3199 fps | 97.8% |
| Accurate No. 11 FS | <<locked>> | 86% | 52,054 psi | 86% | 3140 fps | 99.7% |
| ADI APS 450 | <<locked>> | 82% | 53,954 psi | 90% | 2438 fps | 100% |
| ADI AR 2205 | <<locked>> | 90% | 53,650 psi | 89% | 3077 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 46,035 psi | 76% | 3146 fps | 99.1% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 49,124 psi | 82% | 3140 fps | 96.9% |
| Hodgdon LilGun | <<locked>> | 82% | 53,374 psi | 89% | 3192 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 28,340 psi | 47% | 1939 fps | 100% |
| IMR 4227 | <<locked>> | 96% | 52,214 psi | 87% | 3156 fps | 99% |
| Lovex D060 | <<locked>> | 90% | 53,461 psi | 89% | 3209 fps | 97.9% |
| Lovex D063 | <<locked>> | 86% | 53,447 psi | 89% | 3179 fps | 98% |
| Lovex S040 | <<locked>> | 82% | 51,837 psi | 86% | 3054 fps | 100% |
| Lovex S053 | <<locked>> | 98% | 52,417 psi | 87% | 3159 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 27,804 psi | 46% | 1982 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 53,896 psi | 90% | 3225 fps | 99.1% |
| Shooters World Blackout | <<locked>> | 86% | 53,447 psi | 89% | 3179 fps | 98% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 53,461 psi | 89% | 3209 fps | 97.9% |
| Shooters World SOCOM | <<locked>> | 88% | 51,068 psi | 85% | 3114 fps | 98.1% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 50,415 psi | 84% | 2979 fps | 100% |
| Vihtavuori N110 | <<locked>> | 92% | 52,185 psi | 87% | 3094 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 46,253 psi | 77% | 3110 fps | 99.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 20"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 94% | 46,427 psi | 77% | 3025 fps | 95.4% |
| Accurate 5744 | <<locked>> | 80% | 46,702 psi | 78% | 3077 fps | 96.5% |
| Accurate No. 11 FS | <<locked>> | 80% | 42,714 psi | 71% | 2969 fps | 98.6% |
| ADI APS 450 | <<locked>> | 80% | 52,098 psi | 87% | 2408 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 39,392 psi | 65% | 2822 fps | 99.3% |
| ADI AR 2207 | <<locked>> | 88% | 31,270 psi | 52% | 2802 fps | 95.2% |
| Alliant Reloder-7 | <<locked>> | 96% | 43,424 psi | 72% | 3031 fps | 95.5% |
| Hodgdon LilGun | <<locked>> | 80% | 49,835 psi | 83% | 3136 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 20,465 psi | 34% | 1729 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 35,984 psi | 60% | 2822 fps | 95.4% |
| Lovex D060 | 30.5 gr | 82% | 42,003 psi | 70% | 2972 fps | 95.3% |
| Lovex D063 | <<locked>> | 80% | 43,555 psi | 72% | 2992 fps | 95.9% |
| Lovex S040 | <<locked>> | 80% | 48,820 psi | 81% | 3005 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 30,545 psi | 51% | 2690 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 19,928 psi | 33% | 1765 fps | 100% |
| ReloadSwiss RS 36 | 33.3 gr | 86% | 36,941 psi | 61% | 2887 fps | 95.5% |
| Shooters World Blackout | <<locked>> | 80% | 43,555 psi | 72% | 2992 fps | 95.9% |
| Shooters World Buffalo Rifle | 30.5 gr | 82% | 42,003 psi | 70% | 2972 fps | 95.3% |
| Shooters World SOCOM | <<locked>> | 80% | 38,928 psi | 65% | 2874 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 28,979 psi | 48% | 2566 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 36,361 psi | 60% | 2808 fps | 100% |
| Vihtavuori N120 | <<locked>> | 84% | 27,949 psi | 46% | 2671 fps | 95.1% |
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 22 powders for .307 Win. loaded with the .311 | 90gr | Inceptor SRR. ReloadSwiss RS 36 delivers the highest muzzle velocity at 3,225 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,225 fps. ADI AR 2207 gives the best case fill at 100 %, and 22 of the 22 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 46–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.311" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2207, Alliant Reloder-7, Hodgdon TrailBoss 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. Shooters World Buffalo Rifle, Lovex D060, ReloadSwiss RS 36 rank at the top here: for .307 Win. with the .311 | 90gr | Inceptor SRR 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.