PROJECT 4: FIREARMS IN FLORIDA ...OUR ALL DAY SOCIAL TV EVENT CONTINUES RIGHT NOW..WITH BULLETS. There are countless categories and types...and for people who aren't familiar, it can get complicated. Channel 4's Vic Micolucci talked to experts to simplify it. 3 0 - 8 For those who don't own guns...and even some who do...bullets can be very confusing. Shells, hollow points, a full metal jacket. You've heard the terms in movies...but what do they mean. We must start by dissecting the whole package...with help from forensic expert and former crime scene detective Michael Knox ...29: 57 the primer discharges and then that causes the propellant to discharge and that causes a buildup in pressure and then that buildup in pressure sensor the bullet out of the muzzle of the firearm. Ammunition is broken down into many different categories: ...there are shotgun shells...which have pellets inside...and there's ammo for rifles and handguns.Rifle ammo is usually longer... Those two types can have several types of tips, but the most common are hollow point and full metal jacket. Full metal jacket bullets have a pointed metal tips...that allow them to travel faster and farther after impact.33:51 this on the other hand is a hollow point around. And what the hollow point does is it causes the bullet to expand when it's tissue. It does cause more damage so it is more likely to cause injury Michael Knox says hollow points are most often used by police and those who want their weapons for self defense...they stop the threat...and they're less likely to travel through a person and hurt someone else. 35:17 this round could penetrate through a person and then continue on and still have enough velocity to hit somebody behind them. Knox now makes a living reconstructing crime scenes and trying to solve them ... He says technology is getting better...so officers can find bullets or casings at a crime scene and track down the shooter. Bullets that are fired have a unique fingerprint so-to-say...42:04 there's a transfer of impressions from inside the barrel of the firearm to the outside of the bullet. Ammo is sold all over... you don't need any kind of license to get it...but must be 18 years or older for shotgun and rifle bullets, and 21 and older to buy for handguns. Prices usually range from pennies a shot...to several dollars a round...often depending on supply and demand. Different guns...take different calibers...Aka diameters...some are measured as millimeters...others as fractions of an inch... 3 Again, That was Vic Micolucci reporting.. Our experts stress that you need to be careful with bullets and casings. Just like the actual guns...don't leave bullets out...don't leave them places where kids can get them...the best idea is to keep them locked away in a safe.