meplat

The shape of the meplat is important in determining how the bullet moves through the air.

Only the base of the bullet has a boat tail-like shape - the meplat is still pointed.

In particular the size and shape of the meplat has a significant effect on the ballistic coefficient of a bullet.

The Keith bullet also employed a large, flat meplat, thus enabling rapid energy transfer for greater wounding properties.

Trimming the meplat decreases the bullet's ballistic coefficient, increasing drag and making it more susceptible to wind drift.

This decreases the size of the meplat which increases the ballistic coefficient and reduces drag, time of flight and wind drift.

Originally Keith specified a meplat that was 65% of the bullet caliber, but later increased it to a 70% meplat.

Some target shooters sort their bullets by weight, point their bullets and then trim them to the same meplat width to ensure the greatest possible consistency.

The basic SWC design consists of a roughly conical nose, truncated with a flat point (called a meplat), sitting on a cylinder (A at right).

A bullet constructed with a half diameter ogive designed meplat and hard, solid copper alloy material will crush only the tissue directly in front of the bullet.

For special purposes the 7U1 subsonic cartridge with a black and green painted meplat and CAP cartridge for underwater were developed.

To achieve balanced flight the linear drag has to be balanced with the rotational drag to keep the very fine nose (meplat) of the bullet pointed directly into the oncoming air.

The hollow point cavity dimensions and angles of the meplat were altered to enhance reliability of expansion, though the basic "reverse taper" design pioneered by the Black Talon was retained.

Cartridge, Ball, F1A1 [Green tip]: 5.56x45mm with optimized projectile having a modified boat tail length and meplat diameter, redesigned case thickness, new primer cup design, and AR2210V01 propellant.

Coincidentally, the shape of the nose of an axisymmetric projectile that gives it the least possible aerodynamic drag at hypersonic speeds always has a meplat, the diameter of which depends on the length of the nose.

A bullet constructed with a two diameter, hollow point ogive designed meplat and low-antimony lead-alloy core with a thin gilding metal jacket material will crush tissue in front and to the sides as the bullet expands.

The meplat designs are: flat; round to pointed depending on the ogive; hollow pointed which can be large in diameter and shallow or narrow in diameter and deep and truncated which is a long narrow punched hole in the end of a monolithic-solid type bullet.