Bloke on the Range RECREATES HISTORY with John D. Pedersen’s Cartridge Wax Process

By Nathaniel F

A retarded blowback rifle extracts cases from the chamber while they are still under considerable pressure – over 35,000 PSI. Because of this pressure, the walls of the cartridge cases adhere strongly to the barrel’s chamber walls, while the head is forced back. Under normal circumstances, this would cause a catastrophic case head separation, therefore […]

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Source:: The Firearm Blog