Brisance (brissance) – the “shattering” effect of explosives; the burn rate, in terms of acceleration, i.e., how quickly is the maximum burn rate of an explosive mass reached?
BT – boattail (bullet design) Bullet – the projectile which is expelled from a firearm’s barrel at firing Burn rate – the relative speed at which gun powders burn (explode) This is determined by the size and shape of granules, amount and nature of any coatings and, in some cases, specific physical design of the granules, such as perforations, tubes, rods, ball (beads) or disk shapes (flattened beads). Cal. – Caliber (inches or millimeters); projectile (bullet) diameter or diameter of some specifically defined point in the bore of a barrel; the nominal or approximate diameter of a bore expressed similarly. NOT the same as a cartridge chambering! Caliber is diameter only. .223 Remington is not a caliber. It is a chambering. The number .223 alone, however is understood to mean the .223 Remington, but literally is a caliber. There are several chamberings that use the .223 caliber of bullet or bore. .30-’06 is a chambering. It uses a .308 caliber bullet. Cartridge – completed assembly, comp
