Winchester Ammunition had a low-key introduction for the 400 Legend a couple of weeks ago at SHOT. It uses a 0.422" diameter bolt like the 6.8 SPC, but case is wider ( 0.44" vs 0.4207"). It also only runs at 45,000 psi and the case length is 1.65". The lower chamber pressure is likely due to the rebated rim. The back-force of a cartridge is related to max case diameter, not rim diameter.
www.thefirearmblog.com
New SAAMI Accepted Cartridge: 400 Legend !? -
SAAMI have published cartridge and chamber drawings of a not yet announced cartridge called 400 Legend (400 LGND). Let's take a look.
www.thefirearmblog.com
