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IMPERIAL SPORTING .25" TO .299" /
280 ACKLEY IMPROVED
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IMPERIAL SPORTING .25" TO .299"
280 ACKLEY IMPROVED
280 · 3 headstamps · 1 scan
| Calibre | 280 |
| In the cabinet | IMPERIAL SPORTING .25" TO .299" · 4 images |
Reading the headstamp
12 o'clockMaker's name or factory code
6 o'clockCalibre or year of manufacture
CentrePrimer — Berdan or Boxer, and any seal colour
Research notes
The 280 Ackley Improved is based on the 280 Remington case that was improved upon by P.O Ackley and standardised by Nosler in 2008.
Provenance
2018Catalogued in the collection
2026Record last revised · 2026-01-31
Same drawer
