Load Specifications
Load data in caliber 7 x 49 GJW with .284 | 155gr | Geco EXPRESS bullet and 56 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are SNPE Vectan SP 3, SNPE Vectan BA6 1/2 and Baschieri & Pellagri 102 Pistol.
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 ≥ 60% and propellant combustion ≥ 80%. 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4100² | <<locked>> | 68% | 53,519 psi | 84% | 2119 fps | 100% |
| Accurate No. 11 FS² | <<locked>> | 76% | 55,680 psi | 87% | 2221 fps | 100% |
| Accurate No. 2² | <<locked>> | 64% | 57,696 psi | 90% | 1804 fps | 100% |
| Accurate Solo 1000² | <<locked>> | 72% | 54,839 psi | 86% | 1706 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 72% | 57,667 psi | 90% | 1755 fps | 100% |
| ADI AP 100² | <<locked>> | 76% | 56,260 psi | 88% | 1929 fps | 100% |
| ADI APS 350 | <<locked>> | 80% | 54,897 psi | 86% | 1644 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 55,463 psi | 87% | 1683 fps | 100% |
| ADI AS 30² | <<locked>> | 76% | 55,840 psi | 88% | 1693 fps | 100% |
| ADI AS 50N² | <<locked>> | 68% | 55,230 psi | 87% | 1716 fps | 100% |
| Alliant 2400² | <<locked>> | 68% | 56,782 psi | 89% | 2146 fps | 100% |
| Alliant BE-86² | <<locked>> | 68% | 53,432 psi | 84% | 1706 fps | 100% |
| Alliant BLUE DOT² | <<locked>> | 72% | 54,969 psi | 86% | 2047 fps | 100% |
| Alliant Green Dot² | <<locked>> | 72% | 55,869 psi | 88% | 1729 fps | 100% |
| Alliant Herco | <<locked>> | 80% | 56,144 psi | 88% | 1831 fps | 100% |
| Alliant Power Pro 300-MP² | <<locked>> | 68% | 52,881 psi | 83% | 2178 fps | 100% |
| Alliant RED DOT² | <<locked>> | 76% | 55,114 psi | 86% | 1706 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 68% | 57,101 psi | 89% | 1841 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 68% | 53,156 psi | 83% | 1657 fps | 100% |
| Baschieri & Pellagri 102 Pistol | <<locked>> | 88% | 57,711 psi | 90% | 1722 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 64% | 54,737 psi | 86% | 1703 fps | 100% |
| Hodgdon Clays | <<locked>> | 88% | 54,549 psi | 85% | 1667 fps | 100% |
| Hodgdon H110² | <<locked>> | 68% | 54,157 psi | 85% | 2208 fps | 100% |
| Hodgdon LilGun² | <<locked>> | 68% | 51,416 psi | 81% | 2142 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,619 psi | 51% | 1355 fps | 100% |
| Hodgdon Universal² | <<locked>> | 64% | 54,331 psi | 85% | 1745 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 53,374 psi | 84% | 2218 fps | 100% |
| Maxam CSB 1² | <<locked>> | 72% | 53,911 psi | 84% | 1709 fps | 100% |
| Maxam CSB 2² | <<locked>> | 68% | 54,621 psi | 86% | 1709 fps | 100% |
| Maxam CSB 3² | <<locked>> | 72% | 55,361 psi | 87% | 1722 fps | 100% |
| Maxam CSB 4² | <<locked>> | 72% | 56,231 psi | 88% | 1719 fps | 100% |
| Maxam CSB 5² | <<locked>> | 72% | 56,478 psi | 89% | 1693 fps | 100% |
| Ramshot Enforcer² | <<locked>> | 64% | 52,127 psi | 82% | 2083 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,634 psi | 51% | 1388 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 68% | 57,493 psi | 90% | 1808 fps | 100% |
| ReloadSwiss RS 30 | <<locked>> | 84% | 53,069 psi | 83% | 2195 fps | 100% |
| SNPE Vectan A0² | <<locked>> | 72% | 56,753 psi | 89% | 1778 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 68% | 56,028 psi | 88% | 1745 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 68% | 57,305 psi | 90% | 1765 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 76% | 56,768 psi | 89% | 1699 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 53,040 psi | 83% | 2047 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 72% | 56,652 psi | 89% | 1860 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 68% | 56,724 psi | 89% | 1765 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 56,159 psi | 88% | 2362 fps | 100% |
| Somchem MS200² | <<locked>> | 68% | 56,550 psi | 89% | 1801 fps | 100% |
| Somchem S265 | <<locked>> | 80% | 52,895 psi | 83% | 2129 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 64% | 55,985 psi | 88% | 1860 fps | 100% |
| Vihtavuori 3N38² | <<locked>> | 72% | 57,682 psi | 90% | 1995 fps | 100% |
| Vihtavuori N105² | <<locked>> | 68% | 53,156 psi | 83% | 1932 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 54,578 psi | 86% | 2119 fps | 100% |
| Vihtavuori N320² | <<locked>> | 64% | 52,852 psi | 83% | 1663 fps | 100% |
| Vihtavuori N32C Tin Starᴾ | <<locked>> | 100% | 52,460 psi | 82% | 1585 fps | 100% |
| Vihtavuori N340² | <<locked>> | 64% | 53,156 psi | 83% | 1752 fps | 100% |
| Vihtavuori N350² | <<locked>> | 68% | 55,071 psi | 86% | 1841 fps | 100% |
| Winchester 296² | <<locked>> | 68% | 51,445 psi | 81% | 2231 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 68% | 53,069 psi | 83% | 1732 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 4100² | <<locked>> | 60% | 41,176 psi | 65% | 1969 fps | 100% |
| Accurate No. 11 FS² | <<locked>> | 60% | 32,561 psi | 51% | 1903 fps | 100% |
| Accurate No. 2² | <<locked>> | 60% | 51,938 psi | 81% | 1745 fps | 100% |
| Accurate Solo 1000² | <<locked>> | 60% | 42,409 psi | 66% | 1552 fps | 100% |
| Accurate Solo 1250² | <<locked>> | 60% | 43,163 psi | 68% | 1591 fps | 100% |
| ADI AP 100² | <<locked>> | 60% | 37,159 psi | 58% | 1693 fps | 100% |
| ADI APS 350² | <<locked>> | 60% | 37,753 psi | 59% | 1421 fps | 100% |
| ADI APS 450² | <<locked>> | 60% | 37,405 psi | 59% | 1450 fps | 100% |
| ADI AS 30² | <<locked>> | 60% | 40,161 psi | 63% | 1496 fps | 100% |
| ADI AS 50N² | <<locked>> | 60% | 46,441 psi | 73% | 1611 fps | 100% |
| Alliant 2400² | <<locked>> | 60% | 44,541 psi | 70% | 2001 fps | 100% |
| Alliant BE-86² | <<locked>> | 60% | 43,845 psi | 69% | 1594 fps | 100% |
| Alliant BLUE DOT² | <<locked>> | 60% | 39,131 psi | 61% | 1847 fps | 100% |
| Alliant Green Dot² | <<locked>> | 60% | 42,743 psi | 67% | 1568 fps | 100% |
| Alliant Herco² | <<locked>> | 60% | 35,708 psi | 56% | 1572 fps | 100% |
| Alliant Power Pro 300-MP² | <<locked>> | 60% | 40,480 psi | 63% | 2021 fps | 100% |
| Alliant RED DOT² | <<locked>> | 60% | 39,885 psi | 63% | 1509 fps | 100% |
| Alliant UNIQUE² | <<locked>> | 60% | 46,920 psi | 74% | 1722 fps | 100% |
| Baschieri & Pellagri 100² | <<locked>> | 60% | 43,816 psi | 69% | 1549 fps | 100% |
| Baschieri & Pellagri 102 Pistol² | 10.1 gr | 60% | 32,097 psi | 50% | 1407 fps | 100% |
| Baschieri & Pellagri 103 Pistol² | <<locked>> | 60% | 49,313 psi | 77% | 1647 fps | 100% |
| Hodgdon Clays² | <<locked>> | 60% | 32,634 psi | 51% | 1368 fps | 100% |
| Hodgdon H110² | <<locked>> | 60% | 41,423 psi | 65% | 2047 fps | 100% |
| Hodgdon LilGun² | <<locked>> | 60% | 38,754 psi | 61% | 1982 fps | 100% |
| Hodgdon TrailBoss² | <<locked>> | 60% | 16,766 psi | 26% | 1047 fps | 100% |
| Hodgdon Universal² | <<locked>> | 60% | 49,632 psi | 78% | 1693 fps | 100% |
| IMR 4227² | <<locked>> | 60% | 25,440 psi | 40% | 1765 fps | 99.4% |
| Maxam CSB 1² | <<locked>> | 60% | 40,640 psi | 64% | 1552 fps | 100% |
| Maxam CSB 2² | <<locked>> | 60% | 45,411 psi | 71% | 1601 fps | 100% |
| Maxam CSB 3² | <<locked>> | 60% | 42,975 psi | 67% | 1572 fps | 100% |
| Maxam CSB 4² | <<locked>> | 60% | 43,627 psi | 68% | 1568 fps | 100% |
| Maxam CSB 5² | <<locked>> | 60% | 43,830 psi | 69% | 1539 fps | 100% |
| Ramshot Enforcer² | <<locked>> | 60% | 45,397 psi | 71% | 2001 fps | 100% |
| ReloadSwiss RS 14² | <<locked>> | 60% | 16,665 psi | 26% | 1070 fps | 100% |
| ReloadSwiss RS 20² | <<locked>> | 60% | 47,297 psi | 74% | 1693 fps | 100% |
| ReloadSwiss RS 30² | <<locked>> | 60% | 25,309 psi | 40% | 1778 fps | 100% |
| SNPE Vectan A0² | <<locked>> | 60% | 42,728 psi | 67% | 1617 fps | 100% |
| SNPE Vectan A1² | <<locked>> | 60% | 46,267 psi | 73% | 1634 fps | 100% |
| SNPE Vectan BA 9² | <<locked>> | 60% | 47,094 psi | 74% | 1654 fps | 100% |
| SNPE Vectan BA10² | <<locked>> | 60% | 41,350 psi | 65% | 1506 fps | 100% |
| SNPE Vectan BA6 1/2² | 14.1 gr | 60% | 24,511 psi | 38% | 1637 fps | 100% |
| SNPE Vectan BA7 1/2² | <<locked>> | 60% | 41,684 psi | 65% | 1690 fps | 100% |
| SNPE Vectan BA9 1/2² | <<locked>> | 60% | 46,833 psi | 73% | 1650 fps | 100% |
| SNPE Vectan SP 3*² | 16.2 gr | 60% | 18,231 psi | 29% | 1631 fps | 90.4% |
| Somchem MS200² | <<locked>> | 60% | 46,572 psi | 73% | 1686 fps | 100% |
| Somchem S265² | <<locked>> | 60% | 29,167 psi | 46% | 1775 fps | 100% |
| Vihtavuori 3N37² | <<locked>> | 60% | 50,024 psi | 78% | 1795 fps | 100% |
| Vihtavuori 3N38² | <<locked>> | 60% | 41,133 psi | 64% | 1804 fps | 100% |
| Vihtavuori N105² | <<locked>> | 60% | 41,756 psi | 65% | 1801 fps | 100% |
| Vihtavuori N110² | <<locked>> | 60% | 29,762 psi | 47% | 1781 fps | 100% |
| Vihtavuori N320² | <<locked>> | 60% | 47,921 psi | 75% | 1608 fps | 100% |
| Vihtavuori N32C Tin Star² | <<locked>> | 60% | 25,759 psi | 40% | 1217 fps | 100% |
| Vihtavuori N340² | <<locked>> | 60% | 47,674 psi | 75% | 1690 fps | 100% |
| Vihtavuori N350² | <<locked>> | 60% | 44,570 psi | 70% | 1722 fps | 100% |
| Winchester 296² | <<locked>> | 60% | 39,233 psi | 61% | 2064 fps | 100% |
| Winchester AutoComp ² | <<locked>> | 60% | 43,801 psi | 69% | 1621 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
* not dangerous but load has suboptimal powder burnt with possible characteristics such as extensive muzzle flash or inaccurate loads.
² fill rate low - you might want to consider using a filler to ensure proper ignition.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 56 powders for 7 x 49 GJW loaded with the .284 | 155gr | Geco EXPRESS. SNPE Vectan SP 3 delivers the highest muzzle velocity at 2,362 fps; across all powders the maximum-charge window runs from 1,355 fps to 2,362 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 14 of the 56 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N32C Tin Star 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. SNPE Vectan SP 3, SNPE Vectan BA6 1/2, Baschieri & Pellagri 102 Pistol rank at the top here: for 7 x 49 GJW with the .284 | 155gr | Geco EXPRESS they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss, ReloadSwiss RS 14 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.