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IMPERIAL SPORTING .45 UP TO .499" /
450 BUSHMASTER
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IMPERIAL SPORTING .45 UP TO .499"
450 BUSHMASTER
450 · 3 headstamps · 4 scans
| Calibre | 450 |
| In the cabinet | IMPERIAL SPORTING .45 UP TO .499" · 7 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 .450 Bushmaster was developed by Tim LeGendre of LeMag Firearms and licensed to Bushmaster Firearms International and optimised for use on a standard AR-15 platform. It follows on from the writings of Jeff Cooper, a proponent of the Thumper effect, namely a large bore (greater than .44”) in a semi-auto platform that has enough power for a one-shot kill on larger game at ranges up to 250 yards.
Provenance
2014Catalogued in the collection
2026Record last revised · 2026-01-15
Same drawer
