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Cynthia, yes Ma'am, this is brass cased ammo. No magnetism here. ---((Complete Features and Specifications)): - Manufacturer Number: Q4318AC - Caliber: 9mm NATO - Bullet Type: Full Metal Jacket (FMJ) - Bullet Weight: 124 Grains - Rounds: 1000 Rounds per Case - Muzzle Velocity: 1140 fps - Jacket Material: Copper - Core Material: Lead - Ballistic Coefficient: 0.163 - Casing: Brass.

yes you can use it indoors it has no steel or magnetic components 124 grain copper jacket lead core bullet with a brass case see ******** In 1873, less than a decade after the Civil War and when Westward expansion was in full gallop, Winchester introduced the first successful centerfire cartridges. Winchester has set the world standard in superior ammunition performance and innovation for more than a century. To millions of hunters and shooters worldwide, the name "Winchester" means quality and performance. No matter the sport, game, or protection, you can always depend on the Winchester Ammunition to perform as promised.
1000 Round Case
Features and Specifications:
Manufacturer Number: Q4318AC
Caliber: 9mm NATO
Bullet Type: Full Metal Jacket (FMJ)
Bullet Weight: 124 Grains
Rounds: 1000 Rounds per Case
Muzzle Velocity: 1140 fps
***Jacket Material: Copper
***Core Material: Lead
Ballistic Coefficient: 0.163
****Casing: Brass
Usage: Non-expanding with good accuracy. This round is great for plinking, training, and target shooting.