Bullet base configuration

Whilst most small arms bullets have a base which is the same diameter as the body, long-range rifle bullets have the rear section of the bullet tapered. This is to reduce base drag and is referred to either as a boat-tailed bullet (US nomenclature) or a streamlined bullet (British nomenclature). These bullets are generally military, but can also be encountered in commercial ammunition.

A heeled bullet is one in which the rear portion of the bullet, which fits into the cartridge case, is reduced so that the case diameter is the same as the driving

Cannelure Parts Bullet

Cannelure Figure 2.16 (a) Boat-tailed bullet

(b) Heeled bullet.

Cannelure Figure 2.16 (a) Boat-tailed bullet

(b) Heeled bullet.

surface of the bullet. Whilst this type of bullet is now only encountered in 0.22" rimfire ammunition, in the past, virtually all revolver ammunition was of this type (Figure 2.16).

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