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.276 Pedersen - Wikipedia, the free encyclopedia

Surprisingly the .276 Petersen fires a 7mm .284 bullet, and the case is 51 mm long, same as .308.
The .308 has greater case capacity, however.
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The video said that the .276 was pretty comparable to the 6.5 Carcano and the 6.5 Jap rounds. Very pleasant to fire, due to reduced recoil.

Extremely Rare 1931 Dated Springfield Armory Prototype Model T3E2 Semi-Automatic Rifle in .276 Caliber

T3E2 276 Garand for sale