.303 calibre rifle bullet, Tweedie flat tipped soft point
bullet : base : solid Tweedie base, flat with slightly rounded edge
Description: the Tweedie bullet reversed the usual pattern of manufacture by constructing an envelope with a closed base, the soft metal of the core being introduced through an opening in the head. The bullet was then pressure moulded to the required ogive, thereby reducing the opening at the tip to a small hole. The Tweedie bullet was proof against stripping and separation, problems which had occurred in the early development of smokeless propellants in the .303, but could not be formed into a full metal jacket. The originator of this system was Major-General Tweedie, in his patent Number 22,173, registered in 1891. Tweedie patented in 1889 and 1891 designs for expanding bullets which pre-dated the work in this field of Captain N.S. Bertie-Clay at Dum Dum Arsenal near Calcutta. Tweedie took several approaches to facilitiate expansion, including weakening the front part of the jacket, or canneluring, or making longitudinal slits in the jacket. Bertie-Clay acknowledged that his work was an improvement of Tweedie's design.