Here are some of the basics on bullets.

GRAINS... The unit of measurement used to give the weight of a bullet. There are 437.5 grains in one ounce.

JACKET... The material surrounding the inner core of a bullet. Usually made up of copper or a guilding (mixed) metal.

CORE... the inner material of a bullet. Usually made up of lead or lead mixed with other metals to give the lead specific hardnesses.

HOLLOW POINT... any bullet that has a cavity or hole in the point or tip of the bullet. This can range from pure lead bullets to bullets with lead cores and copper jackets to pure copper bullets.

FULL METAL JACKET... Any bullet that has a jacket of material, usually copper, that completely encompases the inner core.

SOFT POINT... Any bullet that uses a lead core and a copper jacket but leaves an exposed lead tip. These can be pointed bullets (spitzer), round nose bullets, or flat nose bullets.

SOLID... any bullet that is entirely made up of a single type of hard metal that is designed to penetrate extremely dense hide, muscle and bone with out expanding.

POLIMER TIPPED... A bullet that uses a plastic tip. The plastic tip prevents deformation when chambering the cartridge and also yields a higher ballistic coefficient (aero dynamics of a bullet) than standard soft point bullets.