Fishing sinker effects of tungsten, however, are essentially unknown. More recently, terminal tackle manufacturers are experimenting with high density composite resins. These materials present a non-toxic alternative to lead sinkers at a lower monetary cost than alternative metallic sinkers. Fishing sinker A fishing sinker or knoch is a weight used in conjunction with a fishing lure or hook to increase its rate of sink, anchoring ability, and/or casting distance. Fishing sinkers may be as small as 1 gram for applications in shallow water, and even smaller for fly fishing applications, or as large as several pounds or considerably more for deep sea
Hollow-base bullet developing a hollow-base bullet was to improve utility of muzzleloaded blackpowder rifles. Hollow-base bullet A hollow-base bullet is an expanding bullet that has a pit or hollowed out shape in its base often intended to cause the bullet to expand upon firing a cartridge in order to expand the base against the barrel grooves and obturate the bullet more as it travels through the barrel. It is also used for improved aerodynamic stability and accuracy as hollow-base bullets are usually front-weighted which enhances their aerodynamic stability. Two men have been credited of the invention of the hollow-base bullet: Captain Claude-Étienne