Sellier and Bellot Subsonic FMJ 150 Grain 9mm 50 Rounds
This is excellent ammo for practice, recreational shooters, serious competitive handgun shooting sports, Bullseye competitors shooting, action pistol shooting matches, and silhouette shooters. Also an excellent home defense round.
CONDITION New in Box
MANUFACTURER PART NUMBER SB9SUBB
MODEL Sellier & Bellot Ammo
TYPE Handgun Ammo
UPC 754908500932. Sellier and Bellot Subsonic FMJ 150 Grain 9mm 50 Rounds.
Older caseless ammunition typically uses a configuration where the primer and propellant get integrated into the bottom of the projectile, much like a rocket. When fired, the propellant gas is vented out the back of the projectile to accelerate it to speed. Unlike rocket projectiles, which have a similar configuration, the propellant of internal propellant caseless ammunition has a burn time of under 0.2 seconds.
An early type of internal propellant caseless ammunition was Walter Hunt‘s Rocket Ball cartridge. It was developed in 1850s and the guns using it were sold primarily by Volcanic Repeating Arms during that time. Walter Hunt’s Rocket Ball cartridges were severely under-powered and never saw wide acceptance for self-protection, hunting, or military use.
During World War II, Germany began an intensive program to research and develop a practical internal propellant caseless ammunition cartridge for military use, which was driven by the rising scarcity of metals, especially copper used to make cartridge cases.
After WWII the use of internal propellant caseless ammunition largely disappeared from mainstream weapons development, however the type would see a small resurgence when the Soviet Union introduced their GP-25 40 mm internal propellant caseless under-barrel grenade launcher in 1978.