The socom is an awesome cartridge that is basically a long 50ae (o.A.L.Of 1.575") with a rebated.308 style head configuration, necked down to utilize a.458" diameter projectiles.It has been chambered in some bolt guns but it's claim to fame is in the ar-15 platform.Recommended Usage: ReloadingType: HandgunMaterial: BrassStyle: LargeLength: 1.569"-1.576"Gun Type: PistolMetal Type: BrassCaliber Or Gauge: 458 SOCOMQuantity: 50 Per Bag