Geco Load Data
Our Geco load data covers 198,695 load recipes for 39 bullets and 179 calibers. Find all bullets and reloading data below and compare the performance of different powders for each bullet and caliber combination side-by-side.

Behind every success story stands a spirit of innovation and determination. With over 130 years of experience in the development of sporting and hunting ammunition, GECO has evolved from a small entrepreneurial venture into a globally recognized brand. Founded in 1887 by Gustav Genschow, the company began as a wholesaler of firearms and ammunition and quickly grew into a thriving manufacturer, known for its commitment to quality and performance.
Since its founding, GECO has embodied a drive for innovation and technical progress. Today, GECO ammunition is produced under strict quality control standards at state-of-the-art facilities located in Germany, Switzerland, Sweden, and Hungary. This commitment to precision manufacturing ensures reliable performance and consistent results for shooters around the world.
The original philosophy of Gustav Genschow—"quality products in the service of hunting and sport"—continues to define the brand’s identity. GECO ammunition is trusted by both seasoned professionals and emerging shooters, offering a wide selection of high-performance cartridges tailored to modern hunting and sport shooting disciplines.
GECO remains a brand that inspires confidence, delivering proven results through generations of expertise, cutting-edge production, and a passion for supporting hunters and marksmen at every level.
Bullets Covered
39 bullets
All Geco Load Data
.357 Mag. + .357 | 158gr | Geco FMJ FLAT NOSE
.357 Maximum + .357 | 180gr | Geco HEXAGON
10 mm Auto (CIP) + .401 | 180gr | Geco FMJ FLAT NOSE
.357 Mag. + .357 | 180gr | Geco HEXAGON
.30-06 Spring. + .308 | 170gr | Geco PLUS
7 x 64 Brenneke + .284 | 170gr | Geco PLUS
8 x 57 IS + .323 | 196gr | Geco PLUS
9 mm Steyr + .355 | 115gr | Geco FMJ
7 x 65 R Brenneke + .284 | 127gr | Geco ZERO LG
7 x 57 R + .284 | 127gr | Geco ZERO
.38 Special + .357 | 158gr | Geco FMJ FLAT NOSE
.450 Bushmaster + .451 | 230gr | Geco FMJ
9.3 x 62 + .366 | 184gr | Geco ZERO
7.82 Warbird + .308 | 170gr | Geco SOFTPOINT
.357 Mag. + .357 | 158gr | Geco HOLLOW POINT
.243 Win. + .243 | 105gr | Geco SOFTPOINT
9.3 x 57 + .366 | 255gr | Geco SOFTPOINT
7 x 65 R Brenneke + .284 | 170gr | Geco PLUS
.308 Win. + .308 | 136gr | Geco ZERO
7.21 Firebird + .284 | 170gr | Geco SOFTPOINT
.300 HAM'R + .308 | 165gr | Geco EXPRESS
9.3 x 62 + .366 | 255gr | Geco PLUS
.308 Win. + .308 | 165gr | Geco EXPRESS
.38 Short Colt + .355 | 115gr | Geco FMJ
About Geco load data on XXL Reloading
This page collects every Geco bullet we hold reloading data for, grouped by caliber and bullet weight. Each caliber and bullet combination links to a detail page with powder-by-powder load recipes: powder brand and type, start and maximum charge weight in grains and grams, case fill ratio, calculated peak chamber pressure, muzzle velocity and the barrel length the load was computed for.
Unlike a manufacturer's own tables, our Geco data is generated with an inner-ballistics engine across the full powder range, so you can compare many powders side by side for the same bullet instead of the handful a single load manual prints. Charge weights, pressures and velocities are modelled consistently, which makes cross-powder and cross-caliber comparison meaningful when you work up a load.
Use the caliber and bullet-weight filters above to narrow the list, switch to the Bullets tab to browse the Geco product range, and open any combination to see the full load table. All data is calculated reference data for experienced handloaders: always start at the minimum charge, work up carefully in your own rifle, and cross-check against current published data before firing.