This 300 Blackout TMJ is an ideal choice for range day target practice. The 120gr and 150gr TMJ is a bullet made by Berry's Bullets; it is fully encompassed in the copper plating, rather than jacketed. The FMJ projectiles are traditional jacketed bullets.
*The 147gr FMJ has a bi-metal projectile (just the jacket), meaning it WILL STICK TO A MAGNET. Please know that indoor ranges that check for magnetic ammunition will not approve of sending these downrange.
The 220gr subsonic round is a Total Metal Jacket (TMJ) projectile. It's slow subsonic speed makes it an incredibly fun round to shoot out of a suppressed firearm, though a suppressor isn't required for you to enjoy it's benefits.