This wildcat cartridge is being developed in conjuction with a new rifle ; the aim being to have a cast bullet friendly cartridge which features a long neck to cover the grease grooves and having enough powder capacity to drive a heavy for caliber bullet - 220 grains- to around 2200 fps . Cases are formed from 308 Winchester brass which is both readily available and strong.
Cool I designed a similar shortened case/long neck wildcat based on .303 cases for shooting .308 diameter cast bullets subsonic through a lee enfield action
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